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Comprehensive study of pyrido[3,4- b]pyrazine-based D-π-a copolymer for efficient polymer solar cells.
- Source :
-
Journal of Polymer Science Part A: Polymer Chemistry . Jun2016, Vol. 54 Issue 12, p1822-1833. 13p. - Publication Year :
- 2016
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Abstract
- ABSTRACT Two D-π-A copolymers, based on the benzo[1,2- b:4,5- b′]-dithiophene (BDT) as a donor unit and benzo-quinoxaline (BQ) or pyrido-quinoxaline (PQ) analog as an acceptor (PBDT-TBQ and PBDT-TPQ), were designed and synthesized as a p-type material for bulk heterojunction (BHJ) photovoltaic cells. When compared with the PBDT-TBQ polymer, PBDT-TPQ exhibits stronger intramolecular charge transfer, showing a broad absorption coverage at the red region and narrower optical bandgap of 1.69 eV with a relatively low-lying HOMO energy level at −5.24 eV. The experimental data show that the exciton dissociation efficiency of PBDT-TPQ:PC71BM blend is better than that in the PBDT-TBQ:PC71BM blend, which can explain that the IPCE spectra of the PBDT-TPQ-based solar cell were higher than that of the PBDT-TBQ-based solar cell. The maximum efficiency of PBDT-TPQ-based device reaches 4.40% which is much higher than 2.45% of PBDT-TBQ, indicating that PQ unit is a promising electron-acceptor moiety for BHJ solar cells. © 2016 Wiley Periodicals, Inc. J. Polym. Sci., Part A: Polym. Chem. 2016, 54, 1822-1833 [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 0887624X
- Volume :
- 54
- Issue :
- 12
- Database :
- Academic Search Index
- Journal :
- Journal of Polymer Science Part A: Polymer Chemistry
- Publication Type :
- Academic Journal
- Accession number :
- 115099317
- Full Text :
- https://doi.org/10.1002/pola.28044