A simple chemical route for composition graded Cu(In,Ga)S2 thin film solar cells: multi-stage paste coating

Title
A simple chemical route for composition graded Cu(In,Ga)S2 thin film solar cells: multi-stage paste coating
Authors
박세진안상희김지은전효상윤석구황윤정김지현김동욱민병권
Keywords
CIGS; solar cells; Ga-grading; solution process
Issue Date
2015-12
Publisher
RSC advances
Citation
VOL 5, 103439-103444
Abstract
In order to realize the modulation of band-gap profile in low-cost and printable CuInxGa1−xS2 thin-film solar cells, a simple chemical route, namely a multi-stage paste coating method, was developed. In particular, with this method, multiple coatings with two precursor solution pastes with different compositions were applied. Elemental analysis techniques confirmed the formation of three different graded Ga distributions (front, back, and front-and-back gradient) throughout the absorber films depending on the coating sequence with two different pastes. The back gradient cell showed the largest power conversion efficiency of 7.29%, which was almost two times larger than those of the non-graded cells.
URI
http://pubs.kist.re.kr/handle/201004/58226
ISSN
20462069
Appears in Collections:
KIST Publication > Article
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