| 학회 |
한국고분자학회 |
| 학술대회 |
2017년 봄 (04/05 ~ 04/07, 대전컨벤션센터) |
| 권호 |
42권 1호 |
| 발표분야 |
분자전자 부문위원회 I |
| 제목 |
The Impact of Sequential Fluorination of Conjugated Polymers on Charge Generation in All-Polymer Solar Cells |
| 초록 |
The all-PSCs suffer from low exciton dissociation efficiency due to anisotropically structures of polymers, thereby limiting the Jsc and FF. To enhance the exciton dissociation efficiency of all-PSCs, we design new series of polymers (P1-P3) with different number of fluorine atoms. Increased fluorine atoms on polymer results in the large change in ∆μge for P1-P3. The large ∆μge of P3 promotes exciton dissociation with suppressed recombination process, leading to the improved photovoltaic parameters of P3-based all-PSCs. The PCE value of the P3-based all-PSCs outperforms that of P2 and P1-based devices. The reduced recombination as well as the enhanced exciton lifetime in P3-based all-PSCs was supported by the results from light-intensity dependence of Jsc and Voc and TRPL measurements. Our results provide reciprocal understanding of the charge generation process associated with ∆μge in all-PSCs and suggest an effective design strategy of polymer for high-performance all-PSCs. |
| 저자 |
김선하1, Kakaraparthi Kranthiraja2, 이창연1, Gunasekar Kumarasamy2, Bhoj Gautam3, Kenan Gundogdu3, 진성호2, 김범준1
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| 소속 |
1한국과학기술원, 2부산대, 3North Carolina State Univ. |
| 키워드 |
all-polymer solar cells; fluorination; dipole moment; exciton dissociation; charge generation
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| E-Mail |
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