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학술지 Highly Efficient Ag-alloyed Cu(In,Ga)Se2 Solar Cells with Wide Bandgaps and Their Application to Chalcopyrite-based Tandem Solar Cells
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저자
김기환, 안승규, 최장훈, 유진수, 어영주, 조준식, 조아라, 곽지혜, 송수민, 조대형, 정용덕, 윤재호
발행일
201806
출처
Nano Energy, v.48, pp.345-352
ISSN
2211-2855
출판사
Elsevier
DOI
https://dx.doi.org/10.1016/j.nanoen.2018.03.052
협약과제
17JB1600, 무독성 버퍼층을 갖는 다색 플렉서블 박막 태양전지 기술 개발, 정용덕
초록
In this work, Ag alloying effects in wide-bandgap Cu(In,Ga)Se2 (CIGS) solar cells are investigated, and their application in tandem solar cells is attempted. With a three-stage process, highly efficient Ag-alloyed CIGS (ACIGS) solar cells with Eg ?돟 1.4 eV are fabricated; the benefits of Ag alloying are discussed with a focus on the control of structural/electronic disorders. The ACIGS solar cells are found to exhibit particularly improved device performance in specific compositions; in general, Ag alloying helps to enhance VOC in wide-bandgap CIGS solar cells. With wide-bandgap ACIGS cells as a top subcell, various kinds of chalcopyrite-based tandem (two-junction and two-terminal) cells are demonstrated. Prospects and limitations of chalcopyrite-based tandem cells are investigated by examining beam-splitting tandem, mechanically stacked tandem, and monolithic tandem cells.
키워드
Chalcopyrite, CIGS, Multi-junction, Tandem, Wide bandgap
KSP 제안 키워드
Alloying effects, Beam splitting, CIGS solar cell, Multi-junction, Wide Band Gap, device performance, highly efficient, monolithic tandem, tandem cell, tandem solar cell, three-stage process