Habilitation work  (TU Berlin, 2015): "Microscopic structure-property relationships in semiconductor devices : correlative microscopy at the example of Cu(In,Ga)Se2 thin-film solar cells"

Ph.D. thesis (ETH Zurich, 2005): “Structural and chemical analyses of buffer layers in Cu(In,Ga)Se2 thin-film solar cells”

 

Book and book chapters:

  • Abou-Ras, T. Kirchartz, U. Rau (Eds.), “Advanced Characterization Techniques for Thin Film Solar Cells”, 2nd edition, Wiley-VCH, Weinheim, 2016.
  • T. Kirchartz, D. Abou-Ras, U. Rau, “Introduction to thin-film photovoltaics”, in: D. Abou-Ras, T. Kirchartz, U. Rau (Eds.), “Advanced Characterization Techniques for Thin Film Solar Cells”, 2nd edition, Wiley-VCH, Weinheim, 2016.
  • D. Abou-Ras, M. Nichterwitz, M. Romero, S.S. Schmidt, “Electron microscopy on thin films for solar cells”, in: D. Abou-Ras, T. Kirchartz, U. Rau (Eds.), “Advanced Characterization Techniques for Thin Film Solar Cells”, 2nd edition, Wiley-VCH, Weinheim, 2016.

 Refereed contributions to journals:

  1. D. Abou-Ras, N. Schäfer, C.J. Hages, S. Levcenko, J. Marquez, T. Unold, Inhomogeneities in Cu(In,Ga)Se2 thin films for solar cells: the issue of length scales, to be published in RRL Solar (2017).
  2. J. Köszegi, O. Kugeler, R. Schäfer, D. Abou-Ras, J. Knobloch, Towards the perfect Meissner state: A magneto-optical study on magnetic flux expulsion and pinning in high-purity niobium, J. Appl. Phys. 122 (2017) 173901-1-9, doi: 10.1063/1.4996113.
  3. J. Márquez, H. Stange, C. Hages, N. Schaefer, S. Levcenko, S. Giraldo, E. Saucedo, K. Schwarzburg, D. Abou-Ras, A. Redinger, M. Klaus, Ch. Genzel, T.Unold, R. Mainz, Chemistry and dynamics of Ge in kesterite: towards band gap graded absorbers, to be published in Chem. Mater. (2017), doi: 10.1021/acs.chemmater.7b03416.
  4. N. Preissler, C.T. Trinh, M. Trahms, P. Sonntag, D. Abou-Ras, H. Kirmse, R. Schlatmann, B. Rech, D. Amkreutz, Impact of Dielectric Layers on Liquid-Phase Crystallized Silicon Solar Cells, to be published in IEEE J. Photovolt. (2017).
  5. E. Simsek Sanli, Q.M. Ramasse, R. Mainz, A. Weber, D. Abou-Ras, W. Sigle, P.A. van Aken, Evidence for Cu2-xSe platelets at grain boundaries and within grains in Cu(In,Ga)Se2 thin films, Appl. Phys. Lett. 111 (2017) 032103-1-4; doi: 10.1063/1.4993917.
  6. E. Simsek Sanli, D. Barragan-Yani, Q.M. Ramasse, R. Mainz, D. Abou-Ras, A. Weber, H.-J. Kleebe, P. van Aken, K. Albe, Point defect segregation and its role in the detrimental nature of Frank partials in Cu(In,Ga)Se2 thin-film absorbers, Phys. Rev. B 95 (2017) 195209, doi: 10.1103/PhysRevB.00.005200.
  7. O. Cojocaru-Mirédin, T. Schwarz, D. Abou-Ras, Assessment of elemental distributions at line and planar defects in Cu(In,Ga)Se2 thin films by atom probe tomography, to be published in Scripta Mater. (2017), doi: 10.1016/j.scriptamat.2017.03.034 (invited).
  8. N. Haghdadi, D. Abou-Ras, P. Cizek, P.D. Hodgson, A. D. Rollett, H. Beladi, Austenite-ferrite interface crystallography dependence of sigma phase precipitation using the five-parameter characterization approach, Mater. Lett. 196 (2017) 264-268, doi: 10.1016/j.matlet.2017.03.090.
  9. D. Abou-Ras, S. Wagner, B.J. Stanbery, H.-W. Schock, R. Scheer, L. Stolt, S. Siebentritt, D. Lincot, C. Eberspacher, K. Kushiya, A.N. Tiwari, Innovation Highway: Breakthrough Milestones & Key Developments in Chalcopyrite Photovoltaics from a Retrospective Viewpoint, Thin Solid Films 633 (2017) 2-12, doi: 10.1016/j.tsf.2017.01.005.
  10. N. Wanderka, S. Bakai, D. Abou-Ras, N. Schäfer, O. Bakai, The impact of ultrasonic vibrations on shear banding in nanocrystalline titanium, Mater. Lett. 191 (2017) 30-33, doi: 10.1016/j.matlet.2017.01.040.
  11. S.S. Schmidt, C. Wolf, H. Rodriguez-Alvarez, J.-P. Bäcker, C.A. Kaufmann, S. Merdes, F. Ziem, M. Hartig, S. Cinque, I. Dorbandt, C. Köble, D. Abou-Ras, R. Mainz, R. Schlatmann Fast Atmospheric Processing of Cu(In,Ga)(Se,S)2 Solar Cell Absorber Layers Using Elemental Selenium Vapor, Prog. Photovolt.: Res. Appl. 25 (2017) 341-357, doi: 10.1002/pip.2865.
  12. D. Abou-Ras, Correlative microscopy analyses of thin-film solar cells at multiple scales, Mater. Sci. Semicond. Proc. 65 (2017) 35-43, doi: 10.1016/j.mssp.2016.07.009 (invited).
  13. E. Simsek Sanli, Q.M. Ramasse, W. Sigle, D. Abou-Ras, R. Mainz, A. Weber, H.-J. Kleebe, P.A. van Aken, Elemental redistributions at structural defects in Cu(In,Ga)Se2 thin films for solar cells, J. Appl. Phys. 120 (2016) 205301-1-7, doi: 10.1063/1.4967731.
  14. M.L. Addonizio, L. Fusco, A. Antonaia, A. Spadoni, D. Abou-Ras, Rf-sputtered aluminium doped zinc oxide films: enhanced damp heat stability by means of plasma etching treatment, Surf. Coat. Techn. 307 (2016) 800–806, doi: 10.1016/j.surfcoat.2016.09.086.
  15. T. Schmid, N. Schäfer, D. Abou-Ras, Raman microspectroscopy provides access to compositional and microstructural details of polycrystalline materials, Spectroscopy Europe 28 (2016) 13-17 (invited).
  16. S. Kühnapfel, S. Gall, P. Sonntag, N. Schäfer, D. Abou-Ras, Direct correlation of microstructure and device performance of liquid phase crystallized Si thin film solar cells on glass, phys. stat. sol. (RRL) 10 (2016) 657-661, doi: 10.1002/pssr.201600219.
  17. D. Abou-Ras, N. Schäfer, T. Rissom, M.N. Kelly, J. Haarstrich, C. Ronning, G.S. Rohrer, A.D. Rollett, Grain-boundary character distribution and correlations with electrical and optoelectronic properties of CuInSe2 thin films, Acta Mater. 118 (2016) 244-252, doi: 10.1016/j.actamat.2016.07.042.
  18. N. Schäfer, A. Winkelmann, A.J. Wilkinson, T. Schmid, T.U. Schülli, G.A. Chahine, J. Marquardt, S. Schorr, M. Klaus, C. Genzel, T. Rissom, D. Abou-Ras, “Microstrain distribution mapping on CuInSe2 thin films by means of electron backscatter diffraction, X-ray diffraction, and Raman microspectroscopy”, Ultramicroscopy 169 (2016) 89-97, doi: 10.1016/j.ultramic.2016.07.001.
  19. D. Azulay, D. Abou-Ras, I. Popov, I. Balberg, O. Millo, The effect of Na doping on the electronic properties of CuIn1-xGaxSe2 thin films: A local-probe study, phys. stat. sol. (RRL) 10 (2016) 448-452, doi: 10.1002/pssr.201600058.
  20. M. Klingsporn, S. Kirner, C. Villringer, T. Niermann, D. Abou-Ras, I. Costina, M. Lehmann, B. Stannowski, Resolving the nano-structure of plasma-enhanced vapor deposited nanocrystalline silicon oxide layers for application in solar cells, J. Appl. Phys. 119 (2016) 223104-1-8, doi: 10.1063/1.4953566.
  21. J. de Wild, E.V.C. Robert, B. El Adib, D. Abou-Ras, P.J. Dale, Polymorphs and new secondary phase characterization in the Cu2SnS3 system for solar cell application, Sol. En. Mater. Sol. Cells 157 (2016) 259-265, doi: 10.1016/j.solmat.2016.04.039.
  22. R. Mainz, E. Simsek Sanli, H. Stange, D. Azulay, S. Brunken, D. Greiner, S. Hajaj, M.D. Heinemann, C.A. Kaufmann, M. Klaus, Q.M. Ramasse, H. Rodriguez-Alvarez, A. Weber, I. Balberg, O. Millo, P.A. van Aken, D. Abou-Ras, Annihilation of structural defects in chalcogenide absorber films for high-efficiency solar cells, En. Environ. Sci. 9 (2016) 1818-1827, doi: 10.1039/c6ee00402d.
  23. N. Schäfer, G.A. Chahine, A.J. Wilkinson, T. Schmid, T. Rissom, T. Schülli, D. Abou-Ras, Microstrain distributions in polycrystalline thin films measured by X-ray microdiffraction, J. Appl. Cryst. 49 (2016) 632-635, doi: 10.1107/S1600576716003204.
  24. D. Abou-Ras, S.S. Schmidt, N. Schäfer, J. Kavalakkatt, T. Rissom, T. Unold, R. Mainz, A. Weber, T. Kirchartz, E. Simsek Sanli, P.A. van Aken, Q.M. Ramasse, H.-J. Kleebe, D. Azulay, I. Balberg, O. Millo, O. Cojocaru-Mirédin, D. Barragan-Yani, K. Albe, J. Haarstrich, C. Ronning, Compositional and electrical properties of line and planar defects in Cu(In,Ga)Se2 thin films for solar cells - a review, Phys. Stat. Sol. (RRL) 10 (2016) 363-375, doi: 10.1002/pssr.201510440.
  25. W. Witte, D. Abou-Ras, D. Hariskos, Improved growth of solution-deposited buffer layers on Cu(In,Ga)Se2, Phys. Stat. Sol. (RRL) 10 (2016) 300-304, doi: 10.1002/pssr.201510454.
  26. S. Seeger, K. Ellmer, M. Weise, D. Gogova, D. Abou-Ras, R. Mientus, “Reactive magnetron sputtering of Nb-doped TiO2 films: relation between structure, composition and electrical properties”, Thin Solid Films 605 (2016) 44-52, doi: 10.1016/j.tsf.2015.11.058.
  27. T. Schmid, N. Schäfer, S. Levcenco, T. Rissom, D. Abou-Ras, Orientation-distribution mapping of polycrystalline materials by Raman microspectroscopy, Nature Sci. Rep. 5 (2015) 18410-1-7, doi: 10.1038/srep18410.
  28. N. Haghdadi, A. Zarei-Hanzaki, H.R. Abedi, D. Abou-Ras, M. Kawasaki, A.P. Zhilyaev, “Evolution of microstructure and mechanical properties in a hypoeutectic Al-Si-Mg alloy processed by accumulative back extrusion”, Mater. Sci. Eng. A. 651 (2015) 269-279, doi: 10.1016/j.msea.2015.10.066.
  29. K. Prokes, M. Schulze, S. Hartwig, N. Schäfer, S. Landsgesell, C.G.F. Blum, D. Abou-Ras, M.Y. Hacisalihoglu, E. Ressouche, B. Ouladdiaf, C. Hess, B. Büchner, S. Wurmehl, “Structural Inhomogeneities in FeTe0.6Se0.4: Relation to Superconductivity”, J. Crystal Growth 432 (2015) 95-104, doi: 10.1016/j.jcrysgro.2015.09.014.
  30. D. Abou-Ras, R. Caballero, C. Streeck, B. Beckhoff, J.-H. In, and S. Jeong, “Comprehensive comparison of various techniques for the analysis of elemental distributions in thin films – additional techniques”, Microscopy & Microanalysis 21 (2015) 1644-1648, doi: 10.1017/S1431927615015093.
  31. H. Stange, S. Brunken, H. Hempel, H. Rodriguez-Alvarez, N. Schäfer, D. Greiner, A. Scheu, J. Lauche, C. A. Kaufmann, T. Unold, D. Abou-Ras, and R. Mainz, Effect of Na presence during CuInSe2 growth on stacking fault annihilation and electronic properties, Appl. Phys. Lett. 107 (2015) 152103-1-5; doi: 10.1063/1.4933305.
  32. D. Abou-Ras, N. Schäfer, N. Baldaz, S. Brunken, C. Boit, “Electron-beam-induced current measurements with applied bias provide insight to locally resolved acceptor concentrations at p-n junctions”, AIP Advances 5 (2015) 077191-1-7; doi: 10.1063/1.4928097.
  33. N. Kedem, T.M. Brenner, M. Kulbak, N. Schaefer, S. Levcenco, I. Levine, D. Abou-Ras, G. Hodes, D. Cahen, Light-Induced Increase of Electron Diffusion Length in a p-n Junction Type CH3NH3PbBr3 Perovskite Solar Cell, J. Phys. Chem. Lett. 6 (2015) 2469-2476, doi: 10.1021/acs.jpclett.5b00889.
  34. W. Witte, D. Abou-Ras, K. Albe, G.H. Bauer, F. Bertram, C. Boit, R. Brüggemann, J. Christen, J. Dietrich, A. Eicke, D. Hariskos, M. Maiberg, R. Mainz, M. Meessen, M. Müller, O. Neumann, T. Orgis, S. Paetel, J. Pohl, H. Rodriguez-Alvarez, R. Scheer, H.-W. Schock, T. Unold, A. Weber, M. Powalla, “Gallium gradients in Cu(In,Ga)Se2 thin-film solar cells”, Prog. Photovolt.: Res. Appl. 23(6) (2015) 717–733, doi: 10.1002/pip.2485.
  35. C.J. Hages, S. Levcenco, C.K. Miskin, J.H. Alsmeier, D. Abou-Ras, R.G. Wilks, M. Bär, T. Unold, R. Agrawal, “Improved performance of Ge-alloyed CZTGeSSe thin-film solar cells through control of elemental losses”, Prog. Photovolt.: Res. Appl. 23( 3) (2015) 376–384, March 2015 (2015), doi: 10.1002/pip.2442.
  36. S. Landsgesell, K. Prokes, D. Abou-Ras, N. Schäfer, C.V. Colin, “Neutron Diffraction Studies: Structure and Physical Properties of La2O3-xFxFe2Se2”, J. Supercond. Nov. Magn. 28 (2014) 1111-1116, doi: 10.1007/s10948-014-2760-4.
  37. N.S. Mueller, A.J. Morfa, D. Abou-Ras, M. Giersig, “Growing graphene on polycrystalline copper foils by ultra-high vacuum chemical vapor deposition”, Carbon 78 (2014) 347-355, doi: 10.1016/j.carbon.2014.07.011.
  38. R. Baier, C. Leendertz, D. Abou-Ras, M.C. Lux-Steiner, S. Sadewasser, Properties of electronic potential barriers at grain boundaries in Cu(In,Ga)Se2 thin films, Sol. En. Mater. Sol. Cells 130 (2014) 124-131, doi: 10.1016/j.solmat.2014.07.002.
  39. S. Steffens, C. Becker, D. Amkreutz, A. Klossek, M. Kittler, Y.-Y. Chen, A. Schnegg, M. Klingsporn, D. Abou-Ras, K. Lips, B. Rech, “Impact of dislocations and dangling bond defects on the electrical performance of crystalline silicon thin films”, Appl. Phys. Lett. 105, (2014) 022108-1-5, doi: 10.1063/1.4890625.
  40. J. Dietrich, D. Abou-Ras, S.S. Schmidt, T. Rissom, T. Unold, O. Cojocaru-Mirédin, T. Niermann, M. Lehmann, C.T. Koch, C. Boit, “Origins of electrostatic potential wells at dislocations in polycrystalline Cu(In,Ga)Se2 thin films”, J. Appl. Phys. 115 (2014) 103507-1-12; doi: 10.1063/1.4867398.
  41. M. Müller, D. Abou-Ras, T. Rissom, F. Bertram, J. Christen, “Symmetry dependent optoelectronic properties of grain boundaries in polycrystalline Cu(In,Ga)Se2 thin films”, J. Appl. Phys. 115 (2014) 023514-1-6, doi: 10.1063/1.4861149.
  42. J. Kavalakkatt, D. Abou-Ras, J. Haarstrich, C. Ronning, M. Nichterwitz, R. Caballero, T. Rissom, T. Unold, R. Scheer, H.W. Schock, “Electron-beam-induced current at absorber back surfaces of Cu(In,Ga)Se2 thin-film solar cells”, J. Appl. Phys. 115 (2014) 014504-1-10, doi: 10.1063/1.4858393.
  43. N. Haghdadi, A. Zarei-Hanzaki, D. Abou-Ras, M.H. Maghsoudi, A. Ghorbani, M. Kawasaki, “An investigation into the homogeneity of microstructure, strain pattern and hardness of pure aluminum processed by accumulative back extrusion”, Mater. Sci. Eng. A. 595 (2014) 179–187, doi: 10.1016/j.msea.2013.11.077.
  44. Y. Fu, R. Sáez Araoz, T. Koehler, M. Krueger, D. Abou-Ras, A. Steigert, I. Lauermann, U. Bloeck, M.C. Lux-Steiner, C.-H. Fischer, "Self-Assembled, Stabilizer-Free ZnS Nanodot Films using Spray-based Approaches", J. Phys. Chem. 117(46) (2013) 24632–24639, doi: 10.1021/jp409054a.
  45. D. Abou-Ras, J. Kavalakkatt, M. Nichterwitz, N. Schäfer, S. Harndt, A.J. Wilkinson, K. Tsyrulin, H. Schulz, F. Bauer, “Electron Backscatter Diffraction: An Important Tool for Analyses of Structure–Property Relationships in Thin-Film Solar Cells”, The Journal of The Minerals, Metals & Materials Society (JOM) 65 (2013) 1222-1228, doi: 10.1007/s11837-013-0685-1.
  46. N. Haghdadi, A. Zarei-Hanzaki, D. Abou-Ras, “Microstructure and mechanical properties of commercially pure aluminum processed by accumulative back extrusion”, Mater. Sci. Eng. A 584 (2013) 73-81, doi: 10.1016/j.msea.2013.06.060.
  47. H. Rodriguez-Alvarez, R. Mainz, R. Caballero, D. Abou-Ras, M. Klaus, S. Gledhill, A. Weber, C. Kaufmann,  H.-W. Schock, “Real-time study of Ga diffusion processes during the formation of Cu(In,Ga)Se2: The role of Cu and Na content”, Sol. En. Mat. Sol. Cells 116 (2013) 102-109, doi: 10.1016/j.solmat.2013.04.008.
  48. W. Witte, D. Abou-Ras, D. Hariskos, “Chemical bath deposition of Zn(O,S) and CdS buffers: Influence of Cu(In,Ga)Se2 grain orientation”, Appl. Phys. Lett. 102 (2013) 051607-1-4, doi: 10.1063/1.4788717.
  49. S. Merdes, D. Abou-Ras, R. Mainz, R. Klenk, M.C. Lux-Steiner, A. Meeder, H. W. Schock, J. Klaer, “CdS/Cu(In,Ga)S2 based solar cells with efficiencies reaching 12.9% prepared by a rapid thermal process”, Prog. Photovolt.: Res. Appl. 21 (2013) 88-93, doi: 10.1002/pip.2165.
  50. S. Landsgesell, D. Abou-Ras, D. Alber, and K. Prokěs, T. Wolf, “Direct evidence of chemical and crystallographic phase separation in K0.65Fe1.74Se2”, Phys. Rev. B 86 (2012) 224502-1-5, doi: 10.1103/PhysRevB.86.224502.
  51. X. Lin, J. Kavalakkatt, K. Kornhuber, D. Abou-Ras, S. Schorr, M.C. Lux-Steiner, A. Ennaoui,  “Synthesis of Cu2ZnxSnySe1+x+2y Nanocrystals with Wurtzite-Derived Structure”, RSC Advances 2 (2012) 9894-9898, doi: 10.1039/C2RA21293E.
  52. S.S. Schmidt,  D. Abou-Ras, S. Sadewasser, W. Yin, C. Feng, Y. Yan, “Electrostatic potentials at Cu(In,Ga)Se2 grain boundaries - experiment and simulations”, Phys. Rev. Lett. 109 (2012) 095506-1-5, doi: 10.1103/PhysRevLett.109.095506.
  53. D. Abou-Ras, S.S. Schmidt, R. Caballero, T. Unold, H.-W. Schock, C.T. Koch, B. Schaffer, M. Schaffer, P. Choi, O. Cojocaru-Mirédin, “Confined and chemically flexible grain boundaries in polycrystalline compound semiconductors”, Adv. En. Mater. 2 (2012) 992-998, doi: 10.1002/aenm.201100764.
  54. J. Dietrich, D. Abou-Ras, T. Rissom, T. Unold, H.-W. Schock, C. Boit, “Compositional gradients in Cu(In,Ga)Se2 thin films for solar cells and their effects on structural defects”, J. Photovolt. 2 (2012) 364-370, doi: 10.1109/JPHOTOV.2012.2190584.
  55. P. Choi, O. Cojocaru-Mirédin, D. Abou-Ras, R. Caballero, D. Raabe, V.S. Smentkowski, C.G. Park, G.H. Gu, B. Mazumder, M.H. Wong, Y.-L. Hu, T.P. Melo, J.S. Speck, “Atom probe tomography of compound semiconductors for photovoltaic and light-emitting device applications”, Microscopy Today 20 (2012) 18-24, doi: 10.1017/S1551929512000235.
  56. D. Abou-Ras, B. Schaffer, M. Schaffer, S.S. Schmidt, R. Caballero, T. Unold, “Direct insight into grain boundary reconstruction in polycrystalline Cu(In,Ga)Se2 with atomic resolution”, Phys. Rev. Lett. 108 (2012) 075502-1-5, doi: 10.1103/PhysRevLett.108.075502.
  57. D. Abou-Ras, B. Marsen, T. Rissom, F. Frost, H. Schulz, F. Bauer, V. Efimova, V. Hoffmann, A. Eicke, “Enhancements in specimen preparation of Cu(In,Ga)(S,Se)2 thin films”, Micron 43 (2012) 470-474, doi: 10.1016/j.micron.2011.11.004.
  58. O. Cojocaru-Mirédin, P.-P. Choi, D. Abou-Ras, S.S. Schmidt, R. Caballero, D. Raabe, “Characterization of Grain Boundaries in Cu(In,Ga)Se2 films using Atom Probe Tomography”, J. Photovolt. 1 (2011) 207-212, doi: 10.1109/JPHOTOV.2011.2170447.
  59. M. Afshar, S. Sadewasser,  J. Albert, S. Lehmann, D. Abou-Ras, D. Fuertes Marrón, A.A. Rockett, E. Räsänen, M.C. Lux-Steiner, “Chalcopyrite Semiconductors for Quantum Well Solar Cells”, Adv. En. Mat. 1 (2011) 1109-1115, doi: 10.1002/aenm.201100362.
  60. R. Baier, D. Abou-Ras, T. Rissom, M.C. Lux-Steiner, S. Sadewasser, “Symmetry-dependence of electronic grain boundary properties in polycrystalline CuInSe2 thin films”, Appl. Phys. Lett. 99 (2011) 172102-1-3, doi: 10.1063/1.3652915.
  61. D. Abou-Ras, R. Caballero, C.-H. Fischer, C.A. Kaufmann, I. Lauermann, R. Mainz, H. Mönig, A. Schöpke, C. Stephan, C. Streeck, S. Schorr, A. Eicke, M. Döbeli, B. Gade, J. Hinrichs, T. Nunney, H. Dijkstra, V. Hoffmann, D. Klemm, V. Efimova, A. Bergmaier, G. Dollinger, T. Wirth, W. Unger, A.A. Rockett, A. Perez Rodriguez, J. Alvarez Garcia, V. Izquierdo-Roca, T. Schmid, P.-P. Choi, M. Müller, F. Bertram, J. Christen, H. Khatri, R.W. Collins, S. Marsillac, I. Kötschau, “Comprehensive comparison of various techniques for the analysis of elemental distributions in thin films”, Microscopy & Microanalysis 17 (2011) 728-751, doi: 10.1017/S1431927611000523.
  62. S.S. Schmidt, D. Abou-Ras, T. Unold, T. Eisenbarth, H. Wilhelm, A. Grimm, J. Klaer, H.-W. Schock, “Effect of Zn incorporation into CuInS2 solar cell absorbers on microstructural and electrical properties”, J. Appl. Phys. 110 (2011) 064515-1-14, doi: 10.1063/1.3639284.
  63. D. Abou-Ras, J. Dietrich, J. Kavalakkatt,M. Nichterwitz, S.S. Schmidt, C.T. Koch, R. Caballero, J. Klaer, and T. Rissom, “Analysis of Cu(In,Ga)(S,Se)2 thin-film solar cells by means of electron microscopy”, Sol. En. Mat. Sol. Cells 95 (2011) 1452-1462, doi: 10.1016/j.solmat.2010.11.008 (invited).
  64. D. Thomas, R. Mainz, H. Rodriguez-Alvarez, B. Marsen, D. Abou-Ras, M. Klaus, Ch. Genzel, H.-W. Schock, “In-situ studies of the recrystallization process of CuInS2 thin films by energy dispersive X-ray diffraction”, Thin Solid Films 519 (2011) 7193-7196, doi:10.1016/j.tsf.2010.12.229.
  65. S. Sadewasser, D. Abou-Ras, D. Azulay, R. Baier, I. Balberg, D. Cahen, S. Cohen, K. Gartsman, G. Karuppiah, J. Kavalakkatt, W. Li, O. Millo, Th. Rissom, Y. Rosenwaks, H.-W. Schock, A. Schwarzman, T. Unold, “Nanometer-scale electronic and microstructural properties of grain boundaries in Cu(In,Ga)Se2”, Thin Solid Films 519 (2011) 7341-7346, doi:10.1016/j.tsf.2010.12.227.
  66. D. Fuertes Marrón, E. Cánovas, M.Y. Levy, A. Martí, A. Luque, M. Afshar, J. Albert, S. Lehmann, D. Abou-Ras, S. Sadewasser, and N. Barreau, "Optoelectronic evaluation of the nanostructuring approach to chalcopyrite-based intermediate band materials", Sol. En. Mat. Sol. Cells 94 (2010) 1912-1918, doi: 10.1016/j.solmat.2010.06.043.
  67. H. Rodriguez-Alvarez, R. Mainz, B. Marsen, D. Abou-Ras, H.W. Schock, “Recrystallization of Cu-In-S thin films studied in situ by energy-dispersive X-ray diffraction”, J. Appl. Cryst. 43 (2010) 1053-1061, doi:10.1107/S0021889810025860.
  68. N. Naghavi, D. Abou-Ras, N. Allsop, N. Barreau, S. Bücheler, A. Ennaoui, C.-H. Fischer, C. Guillen, D. Hariskos, J. Herrero, R. Klenk, K. Kushiya, D. Lincot, R. Menner, T. Nakada, C. Platzer-Björkman, S. Spiering, A.N. Tiwari, T. Törndahl, “Buffer layers and transparent conducting oxides for chalcopyrite Cu(In,Ga)(S,Se)2 based thin film photovoltaics: present status and current developments”, Prog. Photovolt. 18 (2010) 411-433, doi:10.1002/pip.955 (invited).
  69. D. Abou-Ras, U. Jahn, J. Klaer, M. Nichterwitz, T. Unold, H.-W. Schock, “Combined electron backscatter diffraction and cathodoluminescence measurements on CuInS2/Mo/glass stacks and CuInS2 thin-film solar cells”, J. Appl. Phys. 107 (2010) 014311-1-8, doi:10.1063/1.3275046.
  70. C. Camus, Daniel Abou-Ras, N.A. Allsop, S.E. Gledhill, T. Köhler, J. Rappich, I. Lauermann, M.C. Lux-Steiner and C.-H. Fischer, “Formation of CuInS2-carbon multilayers in the spray ILGAR process”, phys. stat. sol. (a) 207 (2010) 129-131, doi: 10.1002/pssa.200925374.
  71. A. Weber, S. Schmidt, D. Abou-Ras, P. Schubert-Bischoff, I. Denks, R. Mainz, H.W. Schock, “Texture inheritance in thin film growth of Cu2ZnSnS4”, Appl. Phys. Lett. 95 (2009) 041904-1-3, doi: 10.1063/1.3192357.
  72. T. Schmid, C. Camus, S. Lehmann, D. Abou-Ras, C.-H. Fischer, M.C. Lux-Steiner, R. Zenobi, "Spatially resolved characterization of chemical species and crystal structures in CuInS2 and CuGaxSey thin films", phys. stat. sol. (a) 206 (2009) 1013-1016, doi: 10.1002/pssa.200881156.
  73. R. Mainz, F. Streicher, D. Abou-Ras, S. Sadewasser, R. Klenk, M.C. Lux-Steiner, "Combined analysis of spatially resolved electronic structure and composition on a cross-section of thin film Cu(In1-xGax)S2 solar cells", phys. stat. sol. (a) 206 (2009) 1017-1020, doi: 10.1002/pssa.200881216.
  74. M. Contreras, I. Repins, W.K. Metzger, M. Romero, D. Abou-Ras, "Se activity and its effect on Cu(In,Ga)Se2 photovoltaic thin-films", phys. stat. sol. (a) 206 (2009) 1042-1048, doi: 10.1002/pssa.200881243.
  75. S. Höring, D. Abou-Ras, N. Wanderka, H. Leitner, H. Clemens, J. Banhart, ”Characterization of Reverted Austenite during Prolonged Ageing of Maraging Steel CORRAX”, Steel Research International 80 (2009) 84-88, doi: 10.2374/SRI08SP116.
  76. D. Abou-Ras, G. Kostorz, D. Hariskos, R. Menner, M. Powalla, S. Schorr, and A.N. Tiwari, "Structural and chemical analyses of sputtered InxSy buffer layers in Cu(In,Ga)Se2 thin-film solar cells", Thin Solid Films 517, pp. 2792-2798 (2009), doi:10.1016/j.tsf.2008.10.138.
  77. M. Nichterwitz, D. Abou-Ras, K. Sakurai, J. Bundesmann, T. Unold, R. Scheer, H.W. Schock, "Influence of grain boundaries on current collection in Cu(In,Ga)Se2 thin-film solar cells", Thin Solid Films 517, pp. 2554-2557 (2009), doi: 10.1016/j.tsf.2008.11.064.
  78. D. Abou-Ras, C.T. Koch, V. Küstner, P.A. van Aken, U. Jahn, M.A. Contreras, R. Caballero, C.A. Kaufmann, R. Scheer, T. Unold, H.-W. Schock, "Grain-boundary types in chalcopyrite-type thin films and their correlations with film texture and electrical properties", Thin Solid Films 517 (2009) 2545-2549, doi: 10.1016/j.tsf.2008.11.044.
  79. A. Ennaoui, M. Lux-Steiner, A. Weber, D. Abou-Ras, I. Kötschau, H.-W. Schock, R. Schurr, A. Hölzing, S. Jost, R. Hock, T. Voß, J. Schulze, A. Kirbs, "Cu2ZnSnS4 thin film solar cells from electroplated precursors: Novel low-cost Perspective", Thin Solid Films 517 (2009) 2511-2514, doi: 10.1016/j.tsf.2008.11.061.
  80. R. Sáez-Araoz, D. Abou-Ras, T.P. Niesen, A. Neisser, K. Wilchelmi, M.Ch. Lux-Steiner and A. Ennaoui, "In situ monitoring the growth of thin-film ZnS/Zn(S,O) bilayer on Cu-chalcopyrite for high performance thin film solar cells", Thin Solid Films 517 (2009) 2300-2304, doi: 10.1016/j.tsf.2008.10.139.
  81. T. Eisenbarth, T. Unold, R. Caballero, C.A. Kaufmann, D. Abou-Ras and H.-W. Schock, "Origin of defects in CuIn1-xGaxSe2 solar cell with varied Ga content", Thin Solid Films 517 (2009) 2244-2247, 10.1016/j.tsf.2008.10.142.
  82. D. Abou-Ras, M.A. Contreras, R. Noufi, H.-W. Schock, " Impact of the Se evaporation rate on the microstructure and texture of Cu(In,Ga)Se2 thin films for solar cells", Thin Solid Films 517 (2009) 2218-2221, doi: 10.1016/j.tsf.2008.10.133.
  83. D. Abou-Ras, R. Caballero, C.A. Kaufmann, M. Nichterwitz, K. Sakurai, S. Schorr, T. Unold, H.W. Schock, "Impact of the Ga concentration on the microstructure of CuIn1–xGaxSe2", phys. stat. sol. (RRL) 2 (2008) 135-137, doi: 10.1002/pssr.200802059.
  84. C. Camus, E. Rudigier, D. Abou-Ras, N.A. Allsop, T. Unold, Y. Tomm, S. Schorr, S.E. Gledhill, T. Köhler, J. Klaer, M.C. Lux-Steiner, Ch.-H. Fischer, "Phonon confinement and strain in CuInS2", Appl. Phys. Lett. 92 (2008) 101299-1-3, doi: 10.1063/1.2894519.
  85. D. Abou-Ras, J. Gibmeier, G. Nolze, A. Gholinia, P. Konijnenberg, “On the capability of revealing the pseudosymmetry of the chalcopyrite-type crystal structure”, Cryst. Res. Techn. 43 (2008) 234-239, doi: 10.1002/crat.200711082.
  86. D. Abou-Ras, K. Pantleon, "The impact of twinning on the local texture of chalcopyrite-type thin films", phys. stat. sol. (RRL) 1 (2007) 187-189, doi: 10.1002/pssr.200701137.
  87. D. Abou-Ras, S. Schorr, H.-W. Schock, “Grain sizes and grain boundaries in chalcopyrite-type thin films”, J. Appl. Cryst. 40 (2007) 841-848, doi:10.1107/S0021889807032220.
  88. K. Sakurai, T. Neumann, R. Hesse, D. Abou-Ras, P. Jablonski, A. Neisser, C. Kaufmann, S. Niki, R. Scheer, H.-W. Schock, “Characteristics of scattered laser light signals from Cu(In,Ga)Se2 films”, Thin Solid Films 515 (2007) 6222-6225, doi:10.1016/j.tsf.2006.12.161.
  89. C.A. Kaufmann, T. Unold, D. Abou-Ras, J. Bundesmann, A. Neisser, R. Klenk, R. Scheer, K. Sakurai and H.-W. Schock, “Investigation of coevaporated Cu(In,Ga)Se2 thin films in highly efficient solar cells”, Thin Solid Films 515 (2007) 6217-6221, doi:10.1016/j.tsf.2006.12.095.
  90. L. Lityńska, D. Abou-Ras, G. Kostorz, J. Dutkiewicz, “TEM and HREM study of Al3Zr precipitates in Al-Mg-Si-Zr alloy”, J. Microsc. 223 (2006) 182-184, doi:10.1111/j.1365-2818.2006.01615.x.
  91. C. Platzer-Björkman, T. Törndahl, D. Abou-Ras, J. Malmström, J. Kessler, and L. Stolt, “Cu(In,Ga)Se2/Zn(O,S) solar cells: band alignment and sulfur gradient”, J. Appl. Phys.  100  (2006) 044506-1-9, doi:10.1063/1.2222067.
  92. D. Abou-Ras, G. Kostorz, A. Strohm, H.W. Schock, A.N. Tiwari, “Interfacial layer formations between Cu(In, Ga)Se2 and InxSy layers”, J. Appl. Phys. 98 (2005) 123512-1-7, doi:10.1063/1.2149166.
  93. D. Abou-Ras, G. Kostorz, D. Brémaud, M. Kälin, F.V. Kurdesau, A.N. Tiwari, M. Döbeli, “Formation and characterisation of MoSe2 in Cu(In,Ga)Se2-based solar cells”, Thin Solid Films 480-481 (2005) 433-438, doi:10.1016/j.tsf.2004.11.098.
  94. A. Strohm, L. Eisenmann, R.K. Gebhardt, A. Harding, T. Schlötzer, D. Abou-Ras, H.W. Schock, “ZnO/InxSy/Cu(In,Ga)Se2 solar cells fabricated by coherent heterojunction formation”, Thin Solid Films 480-481 (2005) 162-167, doi:10.1016/j.tsf.2004.11.032.
  95. D. Abou-Ras, G. Kostorz, A. Romeo, D. Rudmann, A.N. Tiwari, “Structural and chemical investigations of CBD- and PVD-CdS buffer layers and interfaces in Cu(In,Ga)Se2-based thin film solar cells”, Thin Solid Films 480-481 pp. 118-123 (2005), doi:10.1016/j.tsf.2004.11.033.
  96. D. Abou-Ras, D. Rudmann, G. Kostorz, S. Spiering, M. Powalla, A. N. Tiwari, “Microstructural and chemical studies of interfaces between Cu(In,Ga)Se2 and In2S3 layers”, J. Appl. Phys. 97 (2005) 084908-1-8, doi:10.1063/1.1863454.
  97. A. Romeo, M. Terheggen, D. Abou-Ras, D.L. Bätzner, F.-J. Haug, M. Kälin, D. Rudmann, A.N. Tiwari, “Development of thin-film Cu(In,Ga)Se2 and CdTe solar cells”, Prog. Photovolt: Res. Appl. 12 (2004) 93-111, doi:10.1002/pip.527 (invited).
  98. W. Boujalbem, A. Cheikh-Rouhou, J. Pierre, D. Abou-Ras, J.P. Renard, K. Shimizu, "Inverse colossal magnetoresistance and NMR study in lacunar perovskite manganites Pr0.7Sr0.2¨0.1MnO3 and Pr0.6¨0.1Sr0.3MnO3", Physica B 321 (2002) 68-73, doi:10.1016/S0921-4526(02)00824-4.
  99. D. Abou-Ras, W. Boujalbem, A. Cheikh-Rouhou, J. Pierre, J.P. Renard, L. Reversat, K. Shimizu, "Effect of strontium deficiency on the transport and magnetic properties of Pr0.7Sr0.3MnO3", J. Magn. Magn. Mat. 233 (2001) 147-154, doi:10.1016/S0304-8853(01)00273-6.

Contributions to Conference Proceedings:

  • C. Boit, N. Schäfer, D. Abou-Ras, C. Helfmeier, A. Glowacki, U. Kerst, “Backside Failure Analysis Techniques: What’s The Gain Of Silicon Getting Thinner?”, Proceedings of the 21st International Symposium on the Physical and Failure Analysis of Integrated Circuits (IPFA 2014), Singapore, June 30 – July 4, 2014.
  • O. Cojocaru-Mirédin, D. Abou-Ras, R. Sáez-Araoz, C.-H. Fischer, R. Wuerz, D. Raabe, “Characterization of internal interfaces in Cu(In,Ga)Se2 thin-film solar cells using correlative microscopies”, Conference Record of the 40th IEEE Photovoltaic Specialists Conference and Exhibition, Denver (CO), U.S.A., June 8-13, 2014.
  • N. Schäfer, D. Abou-Ras, M. Nichterwitz, H. Kropf, T. Rissom, A.J. Wilkinson, K. Tsyrulin, H. Schulz, F. Bauer, “Structure-property relationships in thin-film solar cells by scanning electron microscopy in combination with focused ion beam”, Proceedings of the Microscopy Conference 2013 (MC2013), Regensburg, Germany, August 25-30, 2013 (DGE, Regensburg, 2013), MIM.4.P060, pp. 508-509.
  • W. Witte, M. Powalla, D. Hariskos, A. Eicke, M. Botros, H.-W. Schock, D. Abou-Ras, R. Mainz, H. Rodriguez-Alvarez, T. Unold, G.H. Bauer, R. Brüggemann, S.J. Heise, O. Neumann, M. Meessen, J. Christen, F. Bertram, M. Müller, A. Klein, T. Adler, K. Albe, J. Pohl, M. Martin, R.A. De Souza, L. Nagarajan, T. Beckers, C. Boit, J. Dietrich, M. Hetterich, Z. Zhang, R. Scheer, H. Kempa, T. Orgis, “Chemical gradients in Cu(In,Ga)(S,Se)2 thin-film solar cells: results of the GRACIS project”, Proceedings of the 27th European Photovoltaic Solar Energy Conference and Exhibition, Frankfurt/Main, Germany, September 24-28, 2012 (WIP Munich, 2012) pp. 2166-2173, doi: 10.4229/27thEUPVSEC2012-3BO.4.1.
  • D. Abou-Ras, R. Caballero, K. Tsyrulin, F. Bauer, “Accessing structure-property relationships in thin-film solar cells on flexible substrates by scanning electron microscopy”, Proceedings of the 15th European Microscopy Congress 2012, Manchester, UK, September 16-21, 2012 (Royal Microscopy Society, 2012), no. 0557.
  • W. Witte, D. Abou-Ras, and D. Hariskos, “Influence of Cu(In,Ga)Se2 Grain Orientation on Solution Growth of Zn(O,S) and CdS”, 38th IEEE Photovoltaics Specialists Conference and Exhibition, Austin, Texas, U.S.A., June 3-8, 2012, pp. 1995-1998.
  • D. Abou-Ras, S.S. Schmidt, R. Caballero, T. Unold, H.-W. Schock, C.T. Koch, B. Schaffer, M. Schaffer, P.-P. Choi, O. Cojocaru-Mirédin, “Confined and chemically flexible grain boundaries in Cu(In,Ga)Se2 thin films”, Technical Digest of the 21st Photovoltaic Science and Engineering Conference, Fukuoka, Japan, November 29 - December 2, 2011, pp. 3B-3O-01.
  • B. Schaffer, F. Azough, M. Schaffer, D. Abou-Ras, D. Cherns, I. MacLaren, A. Craven, “Applications of atomic resolution EELS mapping”, in: W. Jäger, W. Kaysser, W. Benecke, W. Depmeier, S. Gorb, L. Kienle, M. Mulisch, D. Häußler, A. Lotnyk (Eds.), Proceedings of the Microscopy Conference 2011 (MC2011), Kiel, Germany, August 28 - September 2, 2011 (DGE, Kiel, 2011), p.IM5-515.
  • J. Dietrich, D. Abou-Ras, T. Rissom, T. Unold, H.-W. Schock, C. Boit, “Transmission electron microscope studies on microstructural defects in Ga-graded Cu(In,Ga)Se2 thin films for solar cells”, in: W. Jäger, W. Kaysser, W. Benecke, W. Depmeier, S. Gorb, L. Kienle, M. Mulisch, D. Häußler, A. Lotnyk (Eds.), Proceedings of the Microscopy Conference 2011 (MC2011), Kiel, Germany, August 28 - September 2, 2011 (DGE, Kiel, 2011), p.M1-P504.
  • D. Abou-Ras, S.S. Schmidt, R. Caballero, T. Unold, H.-W. Schock, C.T. Koch, B. Schaffer, M. Schaffer, P.-P. Choi, O. Cojocaru-Mirédin, “High resolution grain boundary analysis of Cu(In,Ga)Se2 thin films in solar cells”, in: W. Jäger, W. Kaysser, W. Benecke, W. Depmeier, S. Gorb, L. Kienle, M. Mulisch, D. Häußler, A. Lotnyk (Eds.), Proceedings of the Microscopy Conference 2011 (MC2011), Kiel, Germany, August 28 - September 2, 2011 (DGE, Kiel, 2011), p.M1-P508.
  • D. Abou-Ras, T. Rissom, B. Marsen, F. Frost, H. Schulz, F. Bauer, V. Efimova, V. Hoffmann, A. Eicke, “Cu agglomerate formation upon ion bombardment on Cu(In,Ga)(S,Se)2 thin films for solar cells”, in: W. Jäger, W. Kaysser, W. Benecke, W. Depmeier, S. Gorb, L. Kienle, M. Mulisch, D. Häußler, A. Lotnyk (Eds.), Proceedings of the Microscopy Conference 2011 (MC2011), Kiel, Germany, August 28 - September 2, 2011 (DGE, Kiel, 2011), p. M1-P511.
  • J. Dietrich, D. Abou-Ras, T. Rissom, T. Unold, H.-W. Schock, C. Boit, Effect of compositional gradients on structural defects in Cu(In,Ga)Se2 thin films for solar cells, Conference Records of the 37th IEEE Photovoltaic Specialists Conference and Exhibition, Seattle, Washington, U.S.A., June 19-24, 2011, pp. 343-347.
  • D. Abou-Ras, S.S. Schmidt, J. Kavalakkatt, R. Caballero, M. Nichterwitz, T. Unold, J. Haarstrich, H. Metzner, C. Ronning, C.T. Koch, B. Schaffer, O. Cojocaru-Mirédin, P.-P. Choi, H.W. Schock, “Grain-boundary physics in Cu(In,Ga)Se2 photovoltaic absorbers revealed by means of various electron microscopy techniques”, Proceedings of the 17th International Microscopy Conference (IMC-17), Rio de Janeiro, Brasil, September 19-24, 2010, pp. M4.3-1-2.
  • P. Pistor, D. Abou-Ras, I. Lauermann, T. Rissom, S. Schmidt, R. Klenk, “Cu diffusion and junction formation at the (PVD-) In2S3 buffer layer / Cu(In,Ga)Se2 absorber interface”, Proceedings of the 5th World Congress on Photovoltaic Energy Conversion (WCPEC-5), Valencia, Spain, September 6-10, 2010 (WIP, Munich, 2010), pp. 2881-2884.
  • D. Abou-Ras, R. Caballero, J. Kavalakkatt, M. Nichterwitz, T. Unold, H.W. Schock, S. Bücheler, A.N. Tiwari, “Electron backscatter diffraction: exploring the microstructure in Cu(In,Ga)(S,Se)2 and CdTe thin-film solar cells”, Conference Records of the 35th IEEE Photovoltaics Specialists Conference, Honolulu, Hawai’i, June 20-25, 2010, pp. 418-423, doi: 10.1109/PVSC.2010.5616785.
  • D. Abou-Ras, J. Bundesmann, J. Kavalakkatt, J. Klaer, B. Marsen, M. Nichterwitz, T. Unold, U. Jahn, W. Jägermann, H. Schulz, F. Reinauer, and H.W. Schock, "Combination of various scanning electron microscopy techniques: applications for thin-film solar cells", G. Kothleitner, M. Leisch (Eds.), MC 2009 Graz, Vol. 1 Instrumentation and Methodology,  Proceedings of the Microscopy Conference (MC 2009), Graz, Austria, August 31-September 4, 2009 (Verlag der Technischen Universität Graz, Austria, 2009), pp. 171-172.         
  • R. Hesse, J.R. Kamdoum Kamdoum, R. Caballero, C.A. Kaufmann, C. Stephan, S. Schorr, D. Abou-Ras, T. Unold, H.-W. Schock, "Structural investigations of copper incorporation into In-Ga-Se precursor layers for Cu(In,Ga)Se2 thin films", phys. stat. sol (c) 6(5) (2009) 1249-1252, Proceedings of  the 16th International Conference on Ternary and Multinary Compounds (ICTMC-16), Berlin, Germany, September 15-19, 2008, doi: 10.1002/pssc.200881244.
  • S. Merdes, R. Kaigawa, J. Klaer, R. Klenk, R. Mainz, A. Meeder, N. Papathanasiou, D. Abou-Ras, S. Schmidt, “Increased open circuit voltage in Cu(In,Ga)S2 based solar cells prepared by rapid thermal processing of metal precursors”, Proceedings of the 23rd European Photovoltaic Solar Energy Conference and Exhibition, Valencia, Spain, September 1-5, 2008 (WIP Munich, 2008) pp. 2588-2591.
  • Abou-Ras, U. Jahn, J. Bundesmann, R. Caballero, C.A. Kaufmann, J. Klaer, M. Nichterwitz, T. Unold, H.W.Schock, "Scanning electron microscopy techniques for cross-sectional analyses of thin-film solar cells", M. Luysberg, K. Tillmann, T. Weirich (Eds.), “EMC 2008”, Vol 1: Instrumentation and Methods, Proceedings of the 14th European Microscopy Congress 2008, Aachen, Germany, September 1-5, 2008 (Springer, 2008) pp. 523-524.
  • D. Abou-Ras, C.A. Kaufmann, A. Schöpke, A. Eicke, M. Döbeli, B. Gade, T. Nunney, "Elemental distribution profiles across Cu(In,Ga)Se2 solar-cell absorbers acquired by various techniques", in: M. Luysberg, K. Tillmann, T. Weirich (Eds.), “EMC 2008”, Vol 1: Instrumentation and Methods, Proceedings of the 14th European Microscopy Congress 2008, Aachen, Germany, September 1-5, 2008 (Springer, 2008) pp. 741-742.
  • R. Hesse, H. Rodriguez Alvarez, R. Mainz, J. Lauche, P. Herdin, D. Abou-Ras, T. Unold, H.-W. Schock, "In-situ monitoring of rapid thermal processes for Cu(In,Ga)(S,Se)2 by optical methods", Proceedings of the SPIE Optics & Photonics: Solar Energy + Applications, San Diego, U.S.A., August 4-8, 2008, in: "Photovoltaic Cell and Module Technologies II", B. von Roedern, A.E. Delahoy (eds.), Proceedings of SPIE 7045, (SPIE, 2008) pp. 704505-1-10, doi: 10.1117/12.794489.
  • D. Abou-Ras, C.A. Kaufmann, A. Eicke, M. Döbeli, B. Gade, and T. Nunney, "Comparison of elemental distribution profiles across Cu(In,Ga)Se2 solar-cell absorbers acquired by various techniques", Proceedings of the Microscopy & Microanalysis 2008, Albuquerque, New Mexico, U.S.A., August 3-7, 2008, Microsc. Microanal. 14 (Suppl. 2), pp 1134-1135 (2008),
    doi: 10.1017/S1431927608084456.
  • O. Volobujeva, D. Abou-Ras, M. Grossberg, J. Raudoja, E. Mellikov, R. Traksmaa, "Selenization of co-sputtered Cu-In alloy films", Conference Records of the 33rd IEEE Photovoltaic Specialists Conference, San Diego, U.S.A., May 12-16, 2008 (IEEE, Piscataway, 2008) pp. 1-4, doi: 10.1109/PVSC.2008.4922549. 
  • D. Abou-Ras, M. Nichterwitz, C.A. Kaufmann, S.Schorr, J. Gibmeier, A. Gholinia, P. Konijnenberg, H.-W. Schock, "Texture and grain-boundary analyses in chalcopyrite-type thin film solar cells", Microsc. Microanal. 13 (Suppl. 3), pp. 388-389 (2007), doi: 10.1017/S1431927607081949.
  • M. Powalla, F. Kessler, D. Hariskos, G. Voorwinden, A.N. Tiwari, D. Brémaud, M. Edoff, S. Schleussner, L. Stolt, B. Dimmler, R. Wächter, R. Klenk, P. Pistor, D. Abou-Ras, H.-W. Schock, O. Kerrec, P.-P. Grand, D. Lincot, N. Naghavi, A. Pérez-Rodríguez, S. Auvray, "Highly productive manufacturing of CIS-based large-area modules", Proceedings of the 22nd European Photovoltaic Solar Energy Conference and Exhibition, Milan, Italy, September 3–7, 2007 (WIP Munich, 2007), pp. 1930-1934.
  • T. Unold, D. Schweigert, D. Abou-Ras, C.A. Kaufmann, R. Klenk, R. Caballero, H.-W. Schock, "Defects in high-efficiency CuIn1-xGaxSe2 solar cells", Proceedings of the 22nd European Photovoltaic Solar Energy Conference and Exhibition, Milan, Italy, September 3–7, 2007 (WIP Munich, 2007), pp. 2405-2408.
  • D. Abou-Ras, M. Nichterwitz, R. Caballero, C.A. Kaufmann, T. Unold, S. Schorr, R. Scheer, J. Klaer, H.-W. Schock, "(Enhanced) insight in the microstructure and composition of chalcopyrite-type thin film solar cells", Proceedings of the 22nd European Photovoltaic Solar Energy Conference and Exhibition, Milan, Italy, September 3–7, 2007 (WIP Munich, 2007), pp. 1911-1914.
  • R. Hesse, R. Caballero, D. Abou-Ras, T. Unold, C.A. Kaufmann, H.-W. Schock, "A reliable optical method for in-situ process control for deposition of Cu(In,Ga)Se2 thin layers for photovoltaics", Proceedings of the SPIE Optics & Photonics: Solar Energy + Applications, San Diego, U.S.A., August 26–30, 2007, in: "Photovoltaic Cell and Module Technologies", B. von Roedern, A.E. Delahoy (eds.), Proceedings of SPIE 6651 (SPIE, 2007) pp. 665108-1-9, doi: 10.1117/12.733726.
  • D. Abou-Ras, M. Nichterwitz, C.A. Kaufmann, S. Schorr, and H.-W. Schock, “Preferred Orientation, Grain Sizes and Grain Boundaries of Chalcopyrite-Type Thin Films”, Thin-Film Compound Semiconductor Photovoltaics 2007, T. Gessert, S. Marsillac, T. Wada, K. Durose, C. Heske (eds.), Mater. Res. Soc. Symp. Proc. 1012 (Warrendale, PA, 2007) pp. Y9.3.1- Y9.3.6.
  • D. Abou-Ras, S. Schorr und H. W. Schock, "Grain-size distributions and grain boundaries of chalcopyrite thin films", Referate der Gemeinsamen Jahrestagung der Deutschen Gesellschaft für Kristallographie und der Deutschen Gesellschaft für Kristallwachstum und Kristallzüchtung, Bremen, Germany, March 5–9, 2007 (Oldenbourg Verlag, München, 2007) - abstract only.
  • J. Klaer, R. Klenk, D. Abou-Ras, R. Scheer, H.W. Schock, D. Schmid, W. Eisele, J. Hinze, I. Luck, C. v. Klopmann, A. Meeder, U. Rühle, N. Meyer, “Progress in Mini-Modules from a CuInS2 baseline process”, Proceedings of the 21st European Photovoltaic Solar Energy Conference and Exhibition, Dresden, Germany, September 4–8, 2006 (WIP Munich, 2006) pp. 1801-1805.
  • D. Abou-Ras, D. Mukherji, G. Kostorz, A.N. Tiwari, "Studies of Cu(In,Ga)Se2 thin-film solar cells by transmission electron microscopy", Proceedings of the Microscopy Conference 2005, 6. Dreiländertagung, Davos, Switzerland, August 28 – September 2, 2005, pp. 317-318.
  • D. Abou-Ras, D. Mukherji, G. Kostorz, D. Brémaud, M. Kälin, D. Rudmann, M. Döbeli, A.N. Tiwari, “Dependence of the MoSe2 formation on the Mo orientation and the Na concentration for Cu(In,Ga)Se2 thin-film solar cells”, Thin-Film Compound Semiconductor Photovoltaics, W. Shafarman, T. Gessert, S. Niki, S. Siebentritt (eds.); Mat. Res. Soc. Symp. Proc. 865 (Warrendale, PA, 2005) pp. F8.1.1-F8.1.6.
  • D. Abou-Ras, H. Heinrich, G. Kostorz, M. Powalla, S. Spiering, A.N. Tiwari, “Structural and chemical investigations of Cu(In,Ga)Se2/ALD-In2S3 interfaces”, Proceedings of  the 19th European Photovoltaic Solar Energy Conference and Exhibition, Paris, France, June 7–11, 2004 (WIP Munich and ETA Ispra, 2004) pp. 1772-1775.
  • A. Romeo, D. Abou-Ras, R. Gysel, S. Buzzi, D.L. Bätzner, D. Rudmann, H. Zogg, A.N. Tiwari, “Properties of CIGS solar cells developed with evaporated II-VI buffer layers”, Technical Digest of the 14th International Photovoltaic Science and Engineering Conference, Bangkok, Thailand, January 26–30, 2004, pp. 705-706 (27-4).
  • U. Opara Krašovec, D. Abou-Ras, A. Georg, A. Georg, J. Luther, "New photovoltaic battery", in: "Solar energy for a sustainable future", Abstract Book of the ISES Solar World Congress 2003, Göteborg, Sweden, June 14–19, 2003 (Solar energy association of Sweden, Göteborg, 2003) p. 100 (W5 16).

Further publications:

  • D. Abou-Ras, T. Eisenbarth, “Charakterisierung von Dünnschichtsolarzellen”, Galvanotechnik 100(9) (2009) 2088-2092 (German) (invited).
  • D. Kraft, D. Abou-Ras, “Microscopic access to PV materials quality”, SOLAR, A PV Management Magazine, issue II (2009) pp. 33-35.