Affiliation of Author(s):材料科学与技术学院

Journal:JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS

Key Words:STAINLESS-STEEL SUBSTRATE OPTIMIZATION

Abstract:Flexible Cu(InGa)Se-2 (CIGS) solar cells on metallic substrates are highly desirable for versatile energy applications. However, related researches reported on CIGS devices usually used a diffusion barrier, which involves an issue of thermal expansion coefficient matching and complicates the fabrication process. In this study, CIGS solar cells were fabricated on Ni and Ti foils through selenization of metal stacks deposited by e-beam evaporation, without the use of diffusion barrier. The films on Ti foils showed (112) preferred orientation while those on Ni foils exhibited (220) preferred orientation, due to the different crystal orientation of substrates. In-Ni and Ga-Ni phase were observed in films prepared on Ni foils, which led to the existence of Cu2-xSe. As a result, the CIGS solar cells fabricated on Ni foils showed inferior photoelectric properties, whereas those on 50 and 100m Ti foils presented conversion efficiency of 4.9% and 6.6%. The discrepancy on efficiency between two cells on Ti foils was ascribed to the different structural properties induced by the thermal stress. After 100 bending cycles, efficiency of cells on 50 and 100m thick Ti foils decreased by 1.0% and 2.6% respectively, indicating that CIGS solar cell on 50m Ti foil is more promising as flexible device applied on harsh circumstance.

ISSN No.:0957-4522

Translation or Not:no

Date of Publication:2019-06-01

Co-author:Chen, Jieyi,Zhai, Zihao,Lily,Lin, Yuxing

Correspondence Author:shl