| 학회 |
한국고분자학회 |
| 학술대회 |
2017년 봄 (04/05 ~ 04/07, 대전컨벤션센터) |
| 권호 |
42권 1호 |
| 발표분야 |
분자전자 부문위원회 I |
| 제목 |
PDI-based small molecule acceptors for efficient fullerene-free organic solar cell : A study on the effect of the molecular arrangement of PDI molecules on Power Conversion Efficiency |
| 초록 |
Perylene diimide (PDI)-containing molecules have been used for application in non-fullerene-based organic solar cells (OSCs). A closer look into reported PDI-based acceptor molecules reveals that two or three PDI molecules arranged mainly in side-on or edge-on direction only. In this work, we synthesized new PDI-based small molecule acceptors (W1-PDI and W2-PDI) which were arranged with both directions to compare with W0-PDI with strong crystallinity as reference. While W1-PDI showed a tendency that the planarity decreases in comparison to W0-PDI; W2-PDI displayed rather opposite tendency. In the results of OSC devices, W1-PDI showed higher power conversion efficiency (PCE=3.10%) than W2-PDI (PCE=1.43%). The results demonstrated that the molecules having twisted structure for alleviating the crystallinity not only bring about the improvement of device performance but also results in adverse effect according to the molecular geometry. |
| 저자 |
김형종, 이지형, 김상범, 조민주, 최동훈
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| 소속 |
고려대 |
| 키워드 |
Organic solar cell; Non-fullerene; n-type semiconductor
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| E-Mail |
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