Keywords: energy (312) solar energy (247) personnel (243) awards (8)

News    12.10.2018

Poster award for HZB PhD student

John Uhlrich, Editor-in-Chief at Wiley VCH presented an award to Quentin Jeangros, EPFL, and Eike Köhnen, HZB, for their outstanding posters (from left to right).
Copyright: Gruppe Steve Albrecht/HZB

Eike Köhnen received an award for his poster on perovskite silicon tandem cells at the 4th International Conference on Perovskite Solar Cells and Optoelectronics (PSCO) in Lausanne, Switzerland. He is a PhD student in the Junior Research Group on Perovskite Tandem Cells led by Dr. Steve Albrecht.

Tandem cells made of organometallic perovskite layers and silicon have the potential for very high efficiencies. While perovskites in particular convert blue parts of the light spectrum into electrical energy, silicon uses the red parts of the light. Eike Köhnen is working on the design of a so-called monolithic tandem cell.

For his poster, which he presented at the 4th International Conference on Perovskite Solar Cells and Optoelectronics (PSCO) in Lausanne, Switzerland, he received an award sponsored by Wiley Science Publishers.

Köhnen has realized a highly efficient monolithic tandem solar cell with an efficiency of 25 percent, which has also been certified by independent bodies. The tandem cell was manufactured at HZB, the silicon cell being produced at HZB-Institute PVcomB and the perovskite cell at HySPRINT. By optimizing the optical and electrical properties of the tandem-top contact, it was even possible to achieve an efficiency of 26 percent, which is the highest efficiency currently published in the literature for this tandem architecture. Since the spectrum arriving on Earth changes over the course of the day, Köhnen also investigated the influence of the spectrum on the behavior of the tandem solar cell.

arö


           



You might also be interested in
  • <p>Jakob Bombsch received an award for his poster on CIGSe absorbers at the spring meeting of the Materials Research Society.</p>NEWS      24.05.2019

    HZB-Doktorand receives poster award

    At the spring meeting of the Materials Research Society, Jakob Bombsch received an award for his poster on CIGSe absorbers for thin-film photovoltaics. Bombsch is a researcher in the department for Interface Design headed by Prof. Marcus Bär.  [...]


  • <p>The idea: during summer, a module with photovoltaic and catalytic materials is splitting molten ice into hydrogen (H<sub>2</sub>) and oxygen. The H<sub>2</sub> is stored.</p>NEWS      22.05.2019

    Energy for Antarctica: solar hydrogen as an alternative to crude oil?

    Volkswagen Foundation funds feasibility study by HZB experts in artificial photosynthesis

    The sun shines at the South Pole as well – and in summer almost around the clock. Instead of supplying research stations in the Antarctic with crude oil for producing the electricity and heating they need, solar hydrogen could be produced from sunlight in summer as an alternative. Hydrogen has a high energy density, is easy to store, and can be used as fuel when needed later without polluting the environment. An intriguingly simple idea - but one that raises many questions. Matthias May (HZB) and Kira Rehfeld (Heidelberg University) now want to examine how feasible this kind of solar fuel generation might be in Antarctica. The project is receiving financial support from the Volkswagen Foundation. [...]


  • <p>Bassi presented results on new phases in the quaternary Fe-Ti-W-O system for application as photoelectrocatalyst in light-assisted water splitting.</p>NEWS      20.05.2019

    Posterprize for HZB postdoc Prince Saurabh Bassi

    Dr. Prince Saurabh Bassi was awarded the poster prize at “International Bunsen-Discussion-Meeting on Fundamentals and Applications of (Photo) Electrolysis for Efficient Energy Storage”. He is a postdoctoral fellow working with Prof. Sebastian Fiechter in the Institute for Solar Fuels. [...]




Newsletter