Dresden 2017 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 64: Poster: Photovoltaics and Optics

HL 64.5: Poster

Wednesday, March 22, 2017, 15:00–19:00, P1C

Solution-producible solar cells with CuInS2- and ZnO nanoparticles — •Harald Reinhold, Dorothea Scheunemann, Jürgen Parisi, and Holger Borchert — University of Oldenburg, Department of Physics, Energy and Semiconductor Research Laboratory, 26111 Oldenburg

Solar cells with CuInS2 nanocrystals are a nontoxic alternative to solar cells with Pb chalcogenides. On the other hand, CuInS2 solar cells show a considerably lower power conversion efficiency. A main reason for this are insufficient transport properties originating from long organic ligands which are essential in the synthesis of CuInS2 nanocrystals [1]. In order to raise the efficiency of our CuInS2 solar cells, we exchanged the long organic ligands by short ionic ligands. After the exchange reaction, the nanoparticles were examined by FTIR spectroscopy and thermogravimetric analysis (TGA), which shows an exchange rate around 90%. Results on the ligand exchange and the impact on the performance of corresponding solar cells will be presented.

[1] D. Scheunemann et. al., Towards depleted heterojunction solar cells with CuInS2 and ZnO nanocrystals, Appl. Phys. Lett.,2013, 103, 133902.