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- Title
Dioctylfluorene-thiophene based conjugated copolymers for bulk heterojunction solar cells and enhanced power conversion efficiency via methanol treatment.
- Authors
Chuang, Hung ‐ Yi; Hsu, Steve Lien ‐ Chung; Chen, Li ‐ Chiun; Sun, Yang; Lin, Pi ‐ Yun
- Abstract
Sensible design and synthesis of conjugating polymers is important to the development of polymer solar cells ( PSCs). In this work, we synthesized and characterized two dioctylfluorene-thiophene based conjugated copolymers, PFTDPP and PFTpBT, having different acceptor groups on the backbone. The photovoltaic properties of the copolymers blended with 6,6-phenyl- C61-butyric acid methyl ester ( PC61BM) as an electron acceptor were obtained. The PSC based on a conventional device configuration ITO/ PEDOT: PSS/ Polymer: PC61BM/ LiF/Al showed power conversion efficiencies ( PCEs) of 2.42% and 3.02% for PFTDPP and PFTpBT, respectively. Methanol treatment was introduced to further optimize device performance, and the solvent treatment gave a dramatic increase in PCE. The best PCEs could reach 4.25% and 4.20% after methanol treatment under AM 1. 5G illumination with an intensity of 100 mW cm−2 from a solar simulator. © 2015 Society of Chemical Industry
- Subjects
CONJUGATED polymers; SOLAR cells; COPOLYMERS; METHANOL; THIOPHENES; COPOLYMERIZATION; CHEMICAL synthesis
- Publication
Polymer International, 2015, Vol 64, Issue 12, p1779
- ISSN
0959-8103
- Publication type
Article
- DOI
10.1002/pi.4979