| 학회 |
한국고분자학회 |
| 학술대회 |
2017년 가을 (10/11 ~ 10/13, 제주컨벤션센터) |
| 권호 |
42권 2호 |
| 발표분야 |
분자전자 부문위원회 I |
| 제목 |
Low-Band Gap Copolymers Based on Diketopyrrolopyrrole and Dibenzosilole and Their Application in Organic Solar Cells |
| 초록 |
We report D-A copolymers incorporating electron-donating dimethylsilole and DPP units. To investigate effects of alkyl chain attached to the DPP unit, 24-alkyl group and 29-alkyl with linear space group were introduced to DPP units. Two polymers, P24DPP-Silole and P29DPP-Silole, exhibited low band gap of 1.46 and 1.36 eV, respectively, and LUMO energy level of 3.85 eV. Photovoltaic devices employing P24DPP-Silole and P29DPP-Silole exhibited the highest power conversion efficiencies of 4.17% and 4.33%, respectively, with CN as a processing additive. Morphological analyses were conducted with AFM, TEM, and GIWAXS to investigate the effects of different alkyl chain on DPP units and processing additive. The analyses revealed that the addition of CN led to favorable phase separation and increased the degree of crystallinity in blend films. This study demonstrates that the copolymerization of DPP and dibenzosilole units is an effective means of narrowing the optical band gap. |
| 저자 |
제환일1, 하연희1, 홍지수2, 안태규3, 윤희준1, 김경훈2, 박찬언2, 김윤희1, 권순기1
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| 소속 |
1경상대, 2포항공대 화학공학과, 3한국교통대 |
| 키워드 |
organic photovoltaics; Low-band gap copolymers
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| E-Mail |
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