| 학회 |
한국고분자학회 |
| 학술대회 |
2015년 봄 (04/08 ~ 04/10, 대전컨벤션센터) |
| 권호 |
40권 1호 |
| 발표분야 |
대학원생 구두발표 (영어발표, 발표15분) |
| 제목 |
Determining the Role of Polymer Molecular Weight for High-Performance All-Polymer Solar Cells: Its Effect on Polymer Aggregation and Phase Separation |
| 초록 |
A series of semi-crystalline PPDT2FBT polymers with different number-average molecular weights(Mn) were synthesized and their photovoltaic properties as electron donors for all-polymer solar cells(all-PSCs) with P(NDI2OD-T2) polymer as a acceptor were studied. Tuning the Mn induced dramatic effects on the aggregation behaviors of the polymers and their bulk heterojunction(BHJ) morphology of all-PSCs, which was thoroughly examined by grazing incident X-ray scattering, resonant soft X-ray scattering, and other microscopy measurements. High Mn PPDT2FBT promoted a strong “face-on” geometry in the blend film, suppressed the formation of an excessively large crystalline domain, and facilitated molecularly-intermixed phases with P(NDI2OD-T2). Therefore, the optimized all-PSCs based on high Mn PPDT2FBT/P(NDI2OD-T2) showed substantially higher hole and electron mobilities than those of low Mn PPDT2FBT/P(NDI2OD-T2), leading to a power conversion efficiency exceeding 5%. |
| 저자 |
우딘 모하메드 압살1, 강현범2, 이창연2, 이원호2, 김범준2, 우한영1
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| 소속 |
1부산대, 2KAIST |
| 키워드 |
all-polymer solar cells (all-PSCs); molecular weight; BHJ morphology; phase separation; intermixed phase; charge mobility
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| E-Mail |
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