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Principal Investigators Eray Aydil, Stephen Campbell, Andre Mkhoyan (all IRG-4)

Semicrystalline Tin Dioxide Films for Improving the Damp Heat Stability of Copper Indium Gallium Diselenide Solar Cells. Timothy P. Lodge, University of Minnesota-Twin Cities, DMR 0819885. Principal Investigators Eray Aydil, Stephen Campbell, Andre Mkhoyan (all IRG-4)

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Principal Investigators Eray Aydil, Stephen Campbell, Andre Mkhoyan (all IRG-4)

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  1. Semicrystalline Tin Dioxide Films for Improving the Damp Heat Stability of Copper Indium Gallium Diselenide Solar Cells Timothy P. Lodge, University of Minnesota-Twin Cities, DMR 0819885 Principal Investigators Eray Aydil, Stephen Campbell, Andre Mkhoyan (all IRG-4) Description and Significance While copper indium gallium diselenide (CIGS) thin-film solar cells with laboratory efficiencies exceeding 20% have been reported, these high efficiencies degrade with time as the devices are exposed to humid environments. In this project, co-funded by MRSEC and Dow Solar, Tosun et al. showed that thin tin dioxide layers, deposited on top of the completed CIGS solar cells can significantly increase the device lifetime by forming a barrier against water diffusion. 3 nm Ni/Al/Ni SnO2 TCO (~300 nm) ZnO (~100 nm) CdS (~40 nm) CIGS(2-3 μm) Mo (~1 μm) Stainless Steel (B.S. Tosun, et al., Thin Solid Films (2011), doi:10.1016/j.tsf.2011.10.16)

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