| 학회 |
한국고분자학회 |
| 학술대회 |
2017년 가을 (10/11 ~ 10/13, 제주컨벤션센터) |
| 권호 |
42권 2호 |
| 발표분야 |
분자전자 부문위원회 I |
| 제목 |
Highly efficient photovoltaic cells with semi-crystalline and wide band gap polymers |
| 초록 |
A series of semi-crystalline, wide band gap photovoltaic polymers was synthesized with varying number and topology of fluorine substituents. To decrease intramolecular charge transfer and to modulate the resulting band gap of D-A type copolymers, electron-releasing alkoxy substituents were attached to electron-deficient benzothiadiazole (A) and electron-withdrawing fluorine atoms (0 ~ 4F) were substituted onto 1,4-bis(thiophen-2-yl)benzene unit (D). Intra- and/or interchain noncovalent coulombic interactions were also incorporated in the polymer backbone to promote planarity and crystalline intermolecular packing. The resulting optical band gap and the valence level were tuned to 1.93 ~ 2.15 eV and -5.37 ~ -5.67 eV, respectively, and strong interchain organization was observed by DSC, high-resolution TEM and GIWAXS measurements. Bulk heterojunction photovoltaic devices showed high power conversion efficiency up to 9.8 % with an open-circuit voltage of 0.94 ~ 1.03 V. |
| 저자 |
Seo-Jin Ko1, Quoc Viet Hoang2, Han Young Woo3, Won Suk Shin4, 김진영1
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| 소속 |
1울산과학기술원, 2재료(연), 3고려대, 4화학(연) |
| 키워드 |
wide band gap polymer; semi-crystalline; fluorine; noncovalent interactions; polymer solar cell; tandem solar cell
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| E-Mail |
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