Amorphous transparent conductors for PV applications

Transparent conducting oxides (TCOs) with qualitatively better resistance to humidity than ZnO, the traditional Cu(In,Ga)Se 2 (CIGS) TCO, are needed to reduce the water-induced degradation of CIGS photovoltaics (PV). Amorphous In-Zn-O (a-IZO) is found both to act as a water vapor transport barrier a...

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Bibliographic Details
Main Authors: Perkins, J D, Gennett, T, Leisch, J E, Sundaramoorthy, R, Repins, I L, van Hest, M F A M, Ginley, D S
Format: Conference Proceeding
Language:English
Subjects:
Optical films
Optical reflection
Optical refraction
Photovoltaic cells
Resistance
Zinc oxide
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Summary:Transparent conducting oxides (TCOs) with qualitatively better resistance to humidity than ZnO, the traditional Cu(In,Ga)Se 2 (CIGS) TCO, are needed to reduce the water-induced degradation of CIGS photovoltaics (PV). Amorphous In-Zn-O (a-IZO) is found both to act as a water vapor transport barrier and to be essentially inert in damp heat testing at 85°C, 85%RH (85/85). In particular, no significant reduction in conductivity or transparency was observed after 40 days at 85/85. In initial PV application testing, a-IZO-finished CIGS solar cells have demonstrated 16.4% efficiency, essentially equal to equivalent CIGS cells finished with Al-doped ZnO.
ISSN:0160-8371
DOI:10.1109/PVSC.2010.5614580