| 학회 |
한국고분자학회 |
| 학술대회 |
2013년 봄 (04/11 ~ 04/12, 대전컨벤션센터) |
| 권호 |
38권 1호 |
| 발표분야 |
분자전자 부문위원회 |
| 제목 |
Effect of Side Alkyl Chain on Molecular Crystallinity in Small Molecule OTFTs and OPVs. |
| 초록 |
We synthesized a series of acceptor-donor-acceptor type small-molecules named Si1TDPP-EE and Si1TDPP-EE-C6. Si1TDPP-EE consist of dithienosiloe (Si) as donor and diketopyrrolopyrrole (DPP) as acceptor to have both optimal energy levels for exciton separation and planarity for close molecular packing and high carrier transport. In Si1TDPP-EE-C6, we introduced (2-hexyl)thiophene at the each end of Si1TDPP-EE for crystallinity increase. Si1TDPP-EE and Si1TDPP-EE-C6 exhibited electrochemical band gaps of 1.61 eV and 1.67 eV. In 2D-GIXD, Si1TDPP-EE-C6 showed higher crystalline ordering than Si1TDPP-EE. We found this increase of crystallinity affected the organic thin film transistor significantly. But this fact affect OPV performance adversely. This result demonstrates that a side alkyl chains induce crystallinity increase, while in molecules:PC60BM blends molecules can’t have nano-scale phase separated channel. |
| 저자 |
정민우, 김봉수
|
| 소속 |
한국과학기술(연) |
| 키워드 |
small molecule; OPV; OTFT
|
| E-Mail |
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