Keywords: energy (300) HZB own research (92)

News    07.07.2015

HZB presents research on thermoelectrics

HZB Group at the ICT/ECT2015. From left to right: Dr. Klaus Habicht (Head of the Department for Methods for Characterization of Transport Phenomena in Energy Materials), Dr. Tommy Hofmann, Dr. Katharina Fritsch, Dr. Britta Willenberg, Dr. Katrin Meier-Kirchner

The annual "International Conference on Thermoelectrics (ICT)” and the "European Conference on Thermoelectrics (ECT)” took place together from 29 June to 02 July 2015 in Dresden, Germany. For the first time, HZB participated in this international multidisciplinary meeting. The HZB Department "Methods for Characterization of Transport Phenomena in Energy Materials" headed by Dr. Klaus Habicht presented their research in two talks and one poster.

Dr. Tommy Hofmann presented a talk on the thermoelectric properties of nanostructured silicon which is prepared at HZB by an electrochemical etching process and which is characterized in-house by macroscopic techniques, and by microscopic probes. This material is currently of great interest as silicon is earth-abundant, non-toxic and inexpensive, which distinguishes it from current thermoelectric materials such as Bi2Te3 or PbTe. The nanostructuring of this simple material offers new possibilities to increase the thermoelectric efficiency of the material, for example by reducing the thermal conductivity through the artificial creation of interfaces within the material. The thermal conductivity as macroscopic quantity relates to the transport of lattice vibrations or phonons on the microscopic level, which can be ideally studied using inelastic neutron scattering techniques available at HZB's research reactor BER II.

In the second talk, Dr. Katharina Fritsch gave an overview of the experimental methods for thermoelectrics research applied in the Department, and she presented selected ongoing research projects. Discussed projects ranged from nanostructured silicon to experiments on the lattice dynamics and electronic bandstructure of low-dimensional thermoelectric single crystals as well as structural investigations of skutterudite compounds.

The structure-functionality relationship in  skutterudite compounds were also the topic of the poster entitled "Yb-filled skutterudites: a combined macroscopic and microscopic approach", in which Dr. Britta Willenberg presented results of a project realised as cooperation between the Department and the Institute of Materials Research at the German Aerospace Center (DLR) in Cologne.

The meeting was a perfect venue to get feedback on our research projects and to present the experimental facilities and research opportunities at HZB to a large audience from Germany and abroad. Overall, we we were able to attract new potential collaboration partners.

Klaus Habicht


You might also be interested in
  • <p>Schematic view of carbon structures with pores.</p>SCIENCE HIGHLIGHT      13.03.2019

    X-ray analysis of carbon nanostructures helps material design

    Nanostructures made of carbon are extremely versatile: they can absorb ions in batteries and supercapacitors, store gases, and desalinate water. How well they cope with the task at hand depends largely on the structural features of the nanopores. A new study from the HZB has now shown that structural changes that occur due to morphology transition with increasing temperature of the synthesis can also be measured directly – using small-angle X-ray scattering. The results have now been published in the journal Carbon. [...]

  • <p>Johannes Sutter received an award for his poster on solarcells at the NIPHO19.</p>NEWS      07.03.2019

    Poster award for Johannes Sutter

    Johannes Sutter, PhD student at HZB, was awarded a poster prize at the "International Conference on Perovskite Solar Cells, Photonics and Optoelectronics (NIPHO19)". The conference took place from 25-27 February 2019 in Jerusalem. [...]

  • <p>Dr. Marcel Risch has been awarded with an ERC Starting Grant and will continue his research at HZB.</p>NEWS      01.03.2019

    Marcel Risch to form research group at the HZB with an ERC Starting Grant

    The Helmholtz-Zentrum Berlin (HZB) will be further strengthened in its research on solar fuels. Dr. Marcel Risch, who recently obtained an ERC Starting Grants, is moving from Georg August Universität, Göttingen to the HZB. Starting in March 2019, the materials physicist will set up his own research group to analyse and improve catalytic materials for water splitting. [...]