| 학회 |
한국고분자학회 |
| 학술대회 |
2012년 봄 (04/12 ~ 04/13, 대전컨벤션센터) |
| 권호 |
37권 1호 |
| 발표분야 |
분자전자 부문위원회 |
| 제목 |
Novel Naphtho[1,2-b:5,6-b′]dithiophene Cored Linear Donor-π-Acceptor Conjugated Small Molecules with Thiophene-bridged Bithiazole Acceptor: Design, Synthesis, and Their Application in Bulk-Heterojunction Organic Solar Cells |
| 초록 |
We report on rationally designed and sequentially synthesized two novel symmetrical and enlarged D-A-D-A-D-type π-conjugated organic small molecules bearing rigidly fused naphtho[1,2-b:5,6-b′]dithiophene core flanked by bithiazole (BNB) or triphenylamine capped thiophene(3-decanyl)-bridged bithiazole (TBNBT) conjugated side chain through thiophene(3-decanyl) spacer. The photophysical and electrochemical studies reveal that these molecular donors have comparable optical band gap (~1.99-2.02 eV) and nearly similar HOMO-LUMO energy levels, while the energy levels of both the small molecules are well-aligned with the PC61BM/PC71BM electron acceptors. Upon evaluating the preliminary BHJ photovoltaic cells configured with the device structure ITO/PEDOT:PSS/small molecule:PC71BM/LiF/Al, the small molecule TBNBT delivered the best power conversion efficiency of 1.62% while BNB showed the maximum efficiency of 1.09% under identical device fabrication conditions. |
| 저자 |
김정석1, Pranabesh Dutta1, 양우승1, 엄승훈1, 김서진1, 이우형2, 강인남2, 이수형1
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| 소속 |
1전북대, 2가톨릭대 |
| 키워드 |
Conjugated small molecules; Donor-acceptor; Solution-processed; Organic solar cells; Power conversion efficiency
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| E-Mail |
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