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Effects of Sodium on Polycrystalline Cu(In,Ga)Se 2 and Its Solar Cell Performance
Author(s) -
Kronik Leeor.,
Cahen David,
Schock Hans Werner
Publication year - 1998
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/(sici)1521-4095(199801)10:1<31::aid-adma31>3.0.co;2-3
Subject(s) - copper indium gallium selenide solar cells , materials science , crystallite , sodium , semiconductor , solar cell , alkali metal , thin film , chemical engineering , inorganic chemistry , nanotechnology , metallurgy , optoelectronics , chemistry , organic chemistry , engineering
The promising new generation of solar cells based on CIGS (Cu(I,Ga)Se 2 ) exhibits behavior differing from that of earlier cells because of changes in the method of preparation, leading, among other things, to a difference in sodium content. A simple defect chemical model is presented for the effects of sodium on the surface chemistry and electronic properties of CIGS thin films. The model, based on the well‐known catalytic effect that alkali metals have on surface oxidation of semiconductors, is shown to be consistent with the experimental data available in the literature.