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  • 03월 02일 17시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제117회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Toward High Efficiency Photovoltaics with Enhanced Long-term Stability Utilizing Block Copolymer Additives

등록일
2016년 2월 17일 10시 32분 06초
접수번호
0895
발표코드
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발표시간
목 09시 : 15분
발표형식
구두발표
발표분야
고분자화학 - 젊은 고분자 화학자 구두발표 (Oral Presentation for Young Polymer Scientists)
저자 및
공동저자
김희준, 김동하1,*, Juan Peng2,*, Ming Jing2
이화여자대학교 나노화학과, Korea
1이화여자대학교 화학나노과학과, Korea
2Fudan University, China
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승인 2건
Organic Photovoltaics (OPVs) have drawn extensive attention due to huge potentials such as low cost and flexibility, however, short exciton diffusion length (~15nm) leads relatively low in power conversion efficiency (PCE), for a cell based on a blend of poly 3-hexylithiophene (P3HT) and phenyl-C61-butyric acid methyl ester (PC61BM). In this study, we demonstrate the enhanced performance of the OPVs by manipulating the morphology of P3HT:PC61BM active layer using P3HT-b-P3PHT block copolymer (BCP) as surfactant. The optical microscope (OM) and atomic force microscopy (AFM) images reveal that the presence of BCP reduces large segregation of PC61BM domains thereby by inhibiting macrophase separation between P3HT and PC61BM. Additionally atomic force microscope (AFM)AFM images indicate significantly reduced surface roughness after incorporation of BCP compared with reference film. These changes lead significantly improvement in current density (Jsc) and fill factor (FF), resulting in enhanced PCE from 3.6% to 4.1%. In addition, the device using P3HT-b-P3PHT BCP surfactants exhibits long-termed operating lifetime when prolonged exposure to high temperature, which remains above 92% of its initial efficiency after post-annealing at 150˚C for 60 min .

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