| 학회 |
한국고분자학회 |
| 학술대회 |
2012년 봄 (04/12 ~ 04/13, 대전컨벤션센터) |
| 권호 |
37권 1호 |
| 발표분야 |
분자전자 부문위원회 |
| 제목 |
A High Mobility Conjugated Polymer Based on Dithienothiophene and Diketopyrrolopyrrole for Organic Photovoltaics |
| 초록 |
Recently, diketopyrrolo[3,4-c]pyrrole (DPP) has emerged as an important building block of active materials for organic electronics. Particularly semiconducting polymers based on DPP exhibited high hole mobilities up to 1.0 cm2·V-1·s-1 in OFETs and promising power conversion efficiencies (PCEs) of 4.5−5.5% in OPVs when DPP is copolymerized with electron-rich monomer such as thiophene. In this work we synthesized a novel conjugated polymer (PDTTDPP) consisting of dithieno[3,2–b:2’,3’–d]thiophene (DTT) and DPP. PDTDPP shows an extended light absorption up to 1020 nm with a low bandgap of 1.39 eV, and moderately low–lying highest occupied molecular orbital level of 5.19 eV. Due to the extended aromatic nature of DTT, PDTTDPP exhibits high intermolecular π–π interaction with edge-on orientation on the substrate in film. The PDTTDPP showed an outstanding hole mobility of 0.68 cm2·V-1·s-1 in OFETs and a promising PCE of 6.05% in OPV with PC71BM without any post treatment. |
| 저자 |
정재웅1, Feng Liu2, Thomas P. Russell3, 조원호2
|
| 소속 |
1서울대, 2Department of Polymer Science and Engineering, 3Univ. of Massachusetts |
| 키워드 |
organic photovoltaic |
| E-Mail |
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