| 학회 |
한국공업화학회 |
| 학술대회 |
2017년 봄 (05/10 ~ 05/12, 광주 김대중컨벤센센터(Kimdaejung Convention Center)) |
| 권호 |
21권 1호 |
| 발표분야 |
고분자 |
| 제목 |
The Impact of Sequential Fluorination of π-Conjugated Polymers on Charge Generation in All-Polymer Solar Cells |
| 초록 |
We design a new series of donors (P1-P3) with different number of fluorine atoms on backbone and investigate the influence on the charge generation. Sequential fluorination on the polymer backbone increases ∆μge (dipole moment change from ground to excited state) from P1 (18.40 D), P2 (25.11 D) to P3 (28.47 D). The large ∆μge of P3 produces efficient exciton dissociation with greatly suppressed charge recombination, leading to the improved photovoltaic parameters for P3-based all-PSCs. Also, the fluorination in P3 and P2 resulted in lower highest-occupied molecular orbital energy level, leading higher open-circuit voltage (VOC). The power conversion efficiency (PCE) value of the P3-based all-PSCs (6.42%) outperforms those of P2 and P1 (5.00 and 2.61%)-based devices. |
| 저자 |
김태수1, Kakaraparthi Kranthiraja2, 김선하1, Gunasekar Kumarasamy2, 이창연1, Bhoj Gautam3, Kenan Gundogdu3, 진성호2, 김범준1
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| 소속 |
1한국과학기술원, 2부산대, 3NC State Univ. |
| 키워드 |
all-polymer solar cells; π-conjugated polymers; dipole moment; charge generation process
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| E-Mail |
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