Photovoltaic devices fabricated with a p-type conjugated multi-branched molecules
- Authors
- Kim, Dae Cheol; Kang, Nam Su; Yu, Jae Woong; Cho, Min Ju; Kim, Kyung Hwan; Choi, Dong Hoon
- Issue Date
- 3월-2009
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Photovoltaic; Multi-branched molecule; Solar cell; Bulk heterojunction; PCBM
- Citation
- SYNTHETIC METALS, v.159, no.5-6, pp.396 - 400
- Indexed
- SCIE
SCOPUS
- Journal Title
- SYNTHETIC METALS
- Volume
- 159
- Number
- 5-6
- Start Page
- 396
- End Page
- 400
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/120465
- DOI
- 10.1016/j.synthmet.2008.10.009
- ISSN
- 0379-6779
- Abstract
- New multi-branched crystalline molecules were synthesized through Horner(Emmons reactions using hexyl-substituted thiophene-based carbaldehydes as dendrons and [1,2,4,5-tetra-(diethoxyphosphorylmethyl)-benzyl]-phosphonic acid diethyl ester as the core unit. 1,2,4,5-Tetrakis((E)-2-(5'-hexyl-2,2'-bithiophen-5-yl)vinyl)benzene (HPBT) and 1,2,4,5-tetrakis((E)-2-(5'-dodecyl-2,2'-bithiophen-5-yl)vinyl)benzene (DPBT) have different alkylene peripheral moities such as the hexyl and dodecyl group. The molecules were employed to fabricate organic photovoltaic (OPV) cells with methanofullerene [6,6]-phenyl C61-butyric acid methyl ester (PCBM). As a result, HPBT-based bulk heterojunction with PCBM exhibited higher short-circuit current density and open circuit voltage, resulting in a higher power conversion efficiency of around 0.944%. (C) 2008 Elsevier B.V. All rights reserved.
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