| 학회 |
한국고분자학회 |
| 학술대회 |
2018년 봄 (04/04 ~ 04/06, 대전컨벤션센터) |
| 권호 |
43권 1호 |
| 발표분야 |
분자전자 부문위원회 I |
| 제목 |
Study of Decohesion and Tensile Properties of All-Polymer and Fullerene-Polymer Solar Cells Based on Same Polymer Donor |
| 초록 |
High fracture resistance of polymer solar cells (PSCs) has been considered one of key parameter to ensure long-term mechanical reliability. In this work, we conducted double-cantilever beam and tensile test to investigate differences of mechanical properties of PTB7-Th-based all-polymer solar cells (all-PSCs) and PCBM based solar cells (PCBM-PSCs). The all-PSCs exhibit much higher fracture energy of 2.45 J m−2 than that (0.29 J m−2) of PCBM-PSCs at optimized device condition. Additionally, 14-fold enhancement in crack onset strain is observed in all-PSCs compared to PCBM-PSCs. Dramatically different mechanical behaviors are elucidated in detail by analysis of the bulk-heterojunction morphology depending on different acceptor material content. The substitution of a small molecule acceptor by a polymer acceptor enables the higher fracture energy of all-PSCs, owing to the intrinsically ductile characteristics of the polymer acceptor and larger plastic deformation during crack growth. |
| 저자 |
최준형1, 김완선1, 김재한2, 김태수1, 이창연1, 이승진1, 김민구1, 김택수1, 김범준1
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| 소속 |
1KAIST, 2Korea Atomic Energy Research Institute |
| 키워드 |
all-polymer solar cells; fullerene-polymer solar cells; mechanical properties; fracture energy; crack onset strain
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| E-Mail |
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