| 학회 |
한국고분자학회 |
| 학술대회 |
2018년 봄 (04/04 ~ 04/06, 대전컨벤션센터) |
| 권호 |
43권 1호 |
| 발표분야 |
분자전자 부문위원회 I |
| 제목 |
Structure-property relations in fullerene and non-fullerene solar cells incorporating DTBDT-based small molecule donors |
| 초록 |
The photovoltaic properties of fullerene and non-fullerene solar cells were systemically studied with DTBDT-based small molecule donors. DTBDT-based small molecules, DTBDT-Rho and DTBDT-S-Rho, were synthesized to have different side chains to modulate the intermolecular interactions. The fullerene solar cell device with DTBDT-Rho as a donor and PC71BM as an acceptor exhibited PCE of 7.84%. The DTBDT-S-Rho:PC71BM solar cells showed PCEs of 5.89%. When O-IDTBR was employed as a non-fullerene acceptor, the DTBDT-Rho:O-IDTBR and DTBDT-S-Rho:O-IDTBR solar cell devices gave PCEs of 4.37% and 2.96%, respectively. The morphological analyses and charge carrier dynamics study revealed that the exciton decay loss driven by large-scale phase separation was a key factor lowering performances in all-small-molecule non-fullerene solar cells. The enhanced molecular aggregation of DTBDT-S-Rho led to higher degrees of phase separation, which is mainly responsible for decreased PCEs. |
| 저자 |
홍지수1, 성민재2, 차효정3, James R. Durrant3, 안태규4, 권순기2, 김윤희2, 박찬언1
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| 소속 |
1포항공과대, 2경상대, 3Imperial College London, 4한국교통대 |
| 키워드 |
All-small-molecule solar cell; non-fullerene solar cell; molecular design; blend morphology; charge carrier dynamics
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| E-Mail |
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