| 학회 |
한국고분자학회 |
| 학술대회 |
2021년 봄 (04/07 ~ 04/09, 대전컨벤션센터) |
| 권호 |
46권 1호 |
| 발표분야 |
분자전자 부문위원회 Ⅰ |
| 제목 |
Ester-Functionalized, Wide-Bandgap PM7 Derivatives for Simultaneous Enhancement of Photovoltaic Performance and Mechanical Robustness of All-Polymer Solar Cells |
| 초록 |
In this study, two wide-bandgap PM7 derivatives are developed via simple structural modification of the fused-accepting unit (i.e., two ester groups on the outer thiophenes (PM7 D1) and on the central thiophene (PM7 D2)). This simple modification creates a higher-energy light absorption window, providing better complementary light harvesting with P(NDI2HD-Se). As a result, PM7 D1-based all-polymer solar cells (all-PSCs) exhibit a high power conversion efficiency (PCE) of 9.13%, which outperforms that of the PM7-based all-PSC (PCE = 6.93%). Importantly, the ester modification has significant impact on the thin-film mechanical ductility and robustness. For example, elongation properties of PM7 D1 and PM7 D2 pristine films are significantly improved by ca. 2.5 times compared to that of PM7. The improved ductile properties of PM7 D1 and PM7 D2 also affect the mechanical ductility of the blend films, leading to 1.5-fold increase in crack onset strain compared with that of PM7 blend film. |
| 저자 |
유호선1, Austin L. Jones2, 마부수1, 김택수1, John R. Reynolds2, 김범준1
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| 소속 |
1KAIST, 2Georgia Institute of Technology |
| 키워드 |
all-polymer solar cells; benzodithiophene polymer donors; ester alkyl side chains; mechanical robustness; stretchability
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| E-Mail |
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