Potassium post deposition treatment of solution-processed kesterite solar cells

THIN SOLID FILMS

卷:633

Article; Proceedings Paper

Haass, S. G.¹  Diethelm, M.¹  Andres, C.¹  Romanyuk, Y. E.¹  Tiwari, A. N.¹ 

[1] Empa Swiss Fed Labs Mat Sci & Technol, Lab Thin Films & Photovolta, Ueberlandstr 129, CH-8600 Dubendorf, Switzerland

关键词: Thin film solar cells;    Kesterite;    Solution processing;    Open circuit voltage deficit;    Post-deposition treatment;   

DOI  :  10.1016/j.tsf.2016.11.012

来源: Elsevier

【 摘 要 】

Potassium post deposition treatment (K-PDT) has been a major breakthrough for CIGSSe (Cu(In,Ga)(S,Se)(2)) solar cells yielding world record efficiencies. K-PDT yields significant improvements in open circuit voltage, fill factor and allows thinning CdS thus leading to efficiencies above 20% for CIGSSe material. Here we present a similar K-PDT approach for solution processed kesterite solar cells. K-PDT improves the open circuit voltage of kesterite solar cells, however a severe blocking of the short circuit current and reduction of fill factor reduces the overall device performance. Furthermore, quantum efficiency measurements indicate that K-PDT alters the properties of the CdS layer whereas time-resolved photoluminescence measurements exhibit an additional third exponential component, which can be attributed to minority carrier trapping at the interface. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

Free