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Fabrication of solution processed 3D nanostructured CulnGaS(2) thin film solar cells

Authors
Chu, Van BenCho, Jin WooPark, Se JinHwang, Yun JeongPark, Hoo KeunDo, Young RagMin, Byoung Koun
Issue Date
28-3월-2014
Publisher
IOP PUBLISHING LTD
Keywords
CIGS; ITO nanorods; solar cells; solution process; 3D nanostructure
Citation
NANOTECHNOLOGY, v.25, no.12
Indexed
SCIE
SCOPUS
Journal Title
NANOTECHNOLOGY
Volume
25
Number
12
URI
https://scholar.korea.ac.kr/handle/2021.sw.korea/98979
DOI
10.1088/0957-4484/25/12/125401
ISSN
0957-4484
Abstract
In this study we demonstrate the fabrication of CuInGaS2 (CIGS) thin film solar cells with a three-dimensional (3D) nanostructure based on indium tin oxide (ITO) nanorod films and precursor solutions (Cu, In and Ga nitrates in alcohol). To obtain solution processed 3D nanostructured CIGS thin film solar cells, two different precursor solutions were applied to complete gap filling in ITO nanorods and achieve the desirable absorber film thickness. Specifically, a coating of precursor solution without polymer binder material was first applied to fill the gap between ITO nanorods followed by deposition of the second precursor solution in the presence of a binder to generate an absorber film thickness of similar to 1.3 mu m. A solar cell device with a (Al, Ni)/AZO/i-ZnO/CdS/CIGS/ITO nanorod/glass structure was constructed using the CIGS film, and the highest power conversion efficiency was measured to be similar to 6.3% at standard irradiation conditions, which was 22.5% higher than the planar type of CIGS solar cell on ITO substrate fabricated using the same precursor solutions.
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