Comprehensive study of pyrido[3,4-b]pyrazine-based D-π-a copolymer for efficient polymer solar cells
| Autor: | Yen Yi Chu, Hsieh Chih Chen, Yun Siou Yang, Chun Guey Wu, Yu Qi Wu, Pin Jiun Wu, Sheng Hsiung Chang |
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| Rok vydání: | 2016 |
| Předmět: |
Materials science
Polymers and Plastics Pyrazine Band gap Organic Chemistry Photovoltaic system 02 engineering and technology Hybrid solar cell 010402 general chemistry 021001 nanoscience & nanotechnology Photochemistry 01 natural sciences Acceptor Polymer solar cell 0104 chemical sciences law.invention chemistry.chemical_compound chemistry law Intramolecular force Solar cell Materials Chemistry 0210 nano-technology |
| Zdroj: | Journal of Polymer Science Part A: Polymer Chemistry. 54:1822-1833 |
| ISSN: | 0887-624X |
| DOI: | 10.1002/pola.28044 |
| Popis: | 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 |
| Databáze: | OpenAIRE |
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