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학술지 Flexible Solar Cells with a Cu(In,Ga)Se2 Absorber Grown by Using a Se Thermal Cracker on a Polyimide Substrate
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저자
박수정, 정용덕, 이우정, 조대형, 위재형, 한원석, 조유석, 윤종만
발행일
201501
출처
한국물리학회, v.66 no.1, pp.76-81
ISSN
0374-4884
출판사
한국물리학회
DOI
https://dx.doi.org/10.3938/jkps.66.76
협약과제
13VB6400, CIGS 박막 태양전지 구조상의 Cd-free 버퍼층에 손상을 주지 않는 TCO 증착 기술 개발, 정용덕
초록
A polyimide substrate was used for the fabrication of flexible Cu(In,Ga)Se2 (CIGS) thin-film solar cells. To deposit a stable Mo layer on a flexible substrate, we measured the residual stress in the polyimide film after the deposition of a Mo layer by varying the process pressure. A CIGS absorber was deposited on a Mo layer at a growth temperature below 500?꼦 by using a Se thermal cracker and various cracking zone temperatures (TC) to improve the reactivity of Se due to the low process temperature. To investigate the effect of Na on the efficiency of a flexible CIGS solar cell, we deposited a Mo:Na layer as a source of Na between the Mo layer and the polyimide substrate. In case of the flexible CIGS solar cell fabricated under the condition of a TC of 800?꼦 with a Mo:Na layer, the highest cell efficiency was achieved at 10.76% without an anti-reflection coating, which is significantly increased by 4% compared to the efficiency of a solar cell without the Mo:Na layer.
키워드
Cu(InGa)Se 2, Na, Polyimide, Se cracker
KSP 제안 키워드
CIGS absorber, Cell Efficiency, Cu(InGa)Se 2, Flexible CIGS solar cell, Flexible substrate, Polyimide substrate, Process pressure, Process temperature, Residual Stress, Thin film solar cells, antireflection coating