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DS: Fachverband Dünne Schichten

DS 37: Focus Session: Sustainable Photovoltaics with Earth Abundant Materials I

DS 37.1: Invited Talk

Thursday, April 3, 2014, 09:30–10:00, CHE 91

Photovoltaics with Copper Oxides — •Bruno Meyer — 1. Physikalisches Institut, JLU Giessen

The p-type conducting Copper-oxide compound semiconductors (Cu2O, Cu4O3 and CuO) provide a unique possibility to tune the band gap energies from 2.1 eV to the infrared at 1.40 eV into the middle of the efficiency maximum for solar cell applications. They appear to be an attractive alternative absorber material in terms of abundance, sustainability, and non-toxicity of the elements. Heterostructures with n-type AlGaN and MgZnO will be the basis of the solar cells. We present experimental results on the band offsets between the three copper oxides and the transparent conducting oxides and nitrides. Based on these finding various combinations of thin-film solar-cells are fabricated and compared to each other. The role of intrinsic defects and interface properties are discussed.