Effects of compression and controlled selenization on powder-fabricated Cu (In,Ga)Se2 thin films

Title
Effects of compression and controlled selenization on powder-fabricated Cu (In,Ga)Se2 thin films
Authors
박종구이승용조소혜안학영박보인송봉근박형호주병권
Keywords
Photovoltaic materials; Cu(In,Ga)Se2 Light absorbing layer; Thin films; Powder process
Issue Date
2019-05
Publisher
Applied surface science
Citation
VOL 475-161
Abstract
Cu(In,Ga)Se2 thin films have been used as a light absorbing layer in high-efficiency solar cells. Among many methods, the powder process for fabricating Cu(In,Ga)Se2 thin films is advantageous, due to its simplicity and minimal usage of materials. However, Cu(In,Ga)Se2 layers produced by the powder process often result in high porosity and small grain sizes, which has been a significant barrier to wide application. In this report, we demonstrate that simple compression of the Cu(In,Ga)S2 powder coat and a cost-efficient selenization using a mixture of Se and Al2O3 can reduce porosity and enlarge the grain size. It is surmised that improved particle packing density in the powder coats, in addition to sintering with a steady supply of Se vapor, synergistically enhances highly sintered Cu(In,Ga)Se2 thin films.
URI
http://pubs.kist.re.kr/handle/201004/68971
ISSN
0169-4332
Appears in Collections:
KIST Publication > Article
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