Enhanced device performance of organic solar cells via reduction of the crystallinity in the donor polymer
- Authors
- Park, JH; Park, JI; Kim, DH; Kim, JH; Kim, JS; Lee, JH; Sim, M; Lee, SY; Cho, K
- Issue Date
- Jul-2010
- Publisher
- Royal Society of Chemistry
- Citation
- JOURNAL OF MATERIALS CHEMISTRY, v.20, pp.5860 - 5865
- Journal Title
- JOURNAL OF MATERIALS CHEMISTRY
- Volume
- 20
- Start Page
- 5860
- End Page
- 5865
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/5947
- DOI
- 10.1039/c0jm00664e
- ISSN
- 0959-9428
- Abstract
- A new pi-conjugated polymer, poly(2,5-dioctyloxyphenylene vinylene-alt-3,3-dioctylquater thiophene) (PPVQT-C8), consisting of alternating p-divinylene phenylene and 3,3-dialkylquater thiophene units, was synthesized for use in organic solar cell devices. The crystallinity of poly(quaterthiophenes) (PQTs) was reduced by introducing p-divinylene phenylene units between pairs of quaterthiophene units. A well-mixed nanoscale morphology of PPVQT-C8:PCBM photoactive layer resulted from this modification, which increased the power conversion efficiency relative to devices based on highly crystalline PQTs. Bulk heterojunction solar cells based on PPVQT-C8:PC60BM blends with a 1 : 3 ratio presented the best photovoltaic performances, with a short-circuit current density (J(sc)) of 6.7 mA cm(-2), an open-circuit voltage (V-oc) of 0.67 V, a fill factor (FF) of 0.62 and a power conversion efficiency (PCE) of 2.8% under illumination of AM 1.5 with light intensity of 100 mW cm(-2). The charge carrier mobility and morphology studies indicated that an optimized interpenetration network composed of PPVQT-C8: PCBM could be achieved in a blend ratio of 1 : 3.
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Collections - College of Engineering > Department of Organic Materials and Fiber Engineering > 1. Journal Articles
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