2017年5月5日
Organic photovoltaics based on poly(3,4-phenylenedioxy-2,5-thienylenevinylene)S
Electrochemistry
- ,
- ,
- 巻
- 85
- 号
- 5
- 開始ページ
- 241
- 終了ページ
- 244
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.5796/electrochemistry.85.241
- 出版者・発行元
- Electrochemical Society of Japan
Poly(3,4-phenylenedioxy-2,5-thienylenevinylene)s with a fluorine substituent at the phenylene moiety (PPhDOTFV) and without the substituent (PPhDOTV) were synthesized by Stille coupling polymerization. They exhibited good solubility in common organic solvents owing to a branched alkyl chain at the phenylene moiety and a narrow optical bandgap of 1.66eV due to an increased conjugated length caused by the vinylene bridge. Both the highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energy levels of PPhDOTFV were 0.2eV deeper than those of PPhDOTV. Organic photovoltaic cells (OPVs) using PPhDOTV:PC70BM exhibited a short-circuit current density (Jsc) of 3.30mAcm-2, an open-circuit voltage (Voc) of 0.52V, and a power conversion efficiency of 0.91%, as compared to 1.62mAcm-2, 0.68V, and 0.45%, respectively, for OPVs using PPhDOTFV:PC70BM. The Jsc value of PPhDOTV-based OPVs was higher than that of PPhDOTFV-based OPVs because of a large LUMO energy offset between PPhDOTV and PC70BM. On the other hand, the Voc value of PPhDOTV-based OPVs was lower than that of PPhDOTFV-based OPVs because of a small energy difference between the HOMO level of PPhDOTV and the LUMO level of PC70BM.
- ID情報
-
- DOI : 10.5796/electrochemistry.85.241
- ISSN : 2186-2451
- ISSN : 1344-3542
- SCOPUS ID : 85019115557