| 학회 |
한국고분자학회 |
| 학술대회 |
2021년 봄 (04/07 ~ 04/09, 대전컨벤션센터) |
| 권호 |
46권 1호 |
| 발표분야 |
분자전자 부문위원회 Ⅰ |
| 제목 |
Strategic Halogenation Enabling High-Performance Small-Molecule Based Organic Solar Cells through Morphology Control |
| 초록 |
Morphology is a key parameter that enables high-performance organic solar cells. A series of benzodithiophene (BDT)-based active materials with specific halogen atom substitutions were developed to control the morphology. The effect of these halogen substitutions on the bulk-heterojunction (BHJ) architecture is demonstrated through microstructure analyses (GIWAXS). When blended with PC71BM, the chlorine substituted one (BDTID-Cl) exhibits a well-mixed morphology and interpenetrating networks, allowing efficient charge transportation. This controlled morphology helps achieve outstanding performance with 10.5% power conversion efficiency (PCE) and the highest fill factor of 78.0% in the single-junction small molecule based organic solar cells (SM-SCs). It can also be applied to two-terminal (2T)-tandem solar cells, resulting in an excellent PCE of 15.1% through complementary absorption in the 2T-tandem solar cells incorporating the SM-SCs. |
| 저자 |
류승운1, 최현태1, 송창은2, 이종철2, 박태호1
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| 소속 |
1POSTECH, 2KRICT |
| 키워드 |
organic solar cell; halogen substitution; morphology
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| E-Mail |
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