湿度对太阳能电池用多晶Cu(In,Ga)Se/sub 2/薄膜的影响:Na和H/sub 2/O共吸附的研究

Conference Record of the Twenty Fifth IEEE Photovoltaic Specialists Conference - 1996 Pub Date : 1996-05-13 DOI:10.1109/PVSC.1996.564264

C. Heske, G. Richter, Zhonghui Chen, R. Fink, E. Umbach, W. Riedl, F. Karg

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引用次数: 5

摘要

利用光电子能谱(XPS, UPS)研究了湿度对rtp法制备的太阳能电池用多晶Cu(In,Ga)Se/sub 2/薄膜内外表面的影响。发现了有意沉积或分离的Na与吸附的H/sub /O的各种相互作用。低温(100 K)下H/sub / o诱导的Na偏析和高温下的反应和脱附改变了CIGS表面的Na含量。进一步的反应，如沉积“金属”Na的钝化和Na- o - cigs复合物的形成，影响电子结构(即工作函数和能带弯曲)，因此对相应的太阳能电池的电性能非常重要。

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Influence of humidity on polycrystalline Cu(In,Ga)Se/sub 2/ thin films for solar cells: a study of Na and H/sub 2/O coadsorption

Photoelectron spectroscopy (XPS, UPS) has been employed to study the influence of humidity on external and internal surfaces of RTP-processed polycrystalline Cu(In,Ga)Se/sub 2/ thin films for solar cells. Various interactions of deliberately deposited or segregated Na with adsorbed H/sub 2/O have been found. The Na content at the CIGS surface is changed by an H/sub 2/O-induced segregation of Na at low temperatures (100 K) and by reaction and desorption at higher temperatures. Further reactions, such as the passivation of as-deposited "metallic" Na and the formation of a Na-O-CIGS complex influence the electronic structure (i.e. the workfunction and band bending) and are thus of great importance for the electrical performance of corresponding solar cells.

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Conference Record of the Twenty Fifth IEEE Photovoltaic Specialists Conference - 1996

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