Efficiency enhancement of Cu(In,Ga)Se2 thin-film solar cells by a post-deposition treatment with potassium fluoride

被引:133
作者
Laemmle, Anke [1 ]
Wuerz, Roland [1 ]
Powalla, Michael [1 ]
机构
[1] Zentrum Sonnenenergie & Wasserstoff Forsch Baden, D-70565 Stuttgart, Germany
来源
PHYSICA STATUS SOLIDI-RAPID RESEARCH LETTERS | 2013年 / 7卷 / 09期
关键词
potassium; Cu(In; Ga)Se-2; solar cells; doping; efficiency; NAF;
D O I
10.1002/pssr.201307238
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Alkali-free Cu(In,Ga)Se-2(CIGS) absorbers grown on Mo-coated alumina (Al2O3) substrates were doped with potassium (K) after CIGS growth by a potassium fluoride (KF) post-deposition treatment (PDT). The addition of K to the absorber leads to a strong increase in cell efficiency from 10.0% for the K-free cell to 14.2% for the K-doped cell, mainly driven by an increase in the open-circuit voltage V-oc and the fill factor FF, and to an increase in the net charge carrier density. Hence K doping by KF-PDT is comparable to doping with Na. (c) 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
引用
收藏
页码:631 / 634
页数:4
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