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HL: Fachverband Halbleiterphysik

HL 45: Joint Poster Session

HL 45.18: Poster

Dienstag, 15. März 2011, 18:00–21:00, P1

Investigation of ZnO interlayer and different substrates for dye-sensitized ZnO/polymer hybrid solar cells — •Julia Waltermann¹, Kay-Michael Günther¹, Stefan Kontermann², and Wolfgang Schade² — ¹Clausthal University of Technology, EFZN, EnergieCampus, Am Stollen 19, 38640 Goslar — ²Fraunhofer Heinrich-Hertz-Institute, EnergieCampus, Am Stollen 19, 38640 Goslar

Dye-sensitized solar cells composed of an n-doped ZnO nanowire array and a p-doped polymer layer appears to be a promising candidate for low-cost production of environment-friendly solar cells. Earlier investigations on hybrid devices consisting of a transparent conducting oxide (TCO) substrate, ZnO-nanowires, a ruthenium dye (N719) and a PEDOT:PSS or P3HT layer have exposed that in our setup an additional polycrystalline ZnO layer beneath the ZnO nanowires is needed. It prevents short circuits caused by polymer seeping between the nanowires towards the counter electrode. To find the best combination of substrate material and ZnO deposition technique in this work three different TCO substrates: ITO, FTO or aluminium doped zinc oxide (ZnO:Al) are combined with ZnO layers prepared either by sputtering or by a sol-gel method. The samples are compared regarding surface topography, resistivity and possible build-up Schottky barriers.