Abstract
A new donor-acceptor copolymer, containing benzodithiophene (BDT) and methyl thiophene-3-carboxylate (3MT) units, is designed and synthesized for polymer solar cells (PSCs). The 3MT unit is used as an electron acceptor unit in this copolymer to provide a lower highest occupied molecular orbital (HOMO) level for obtaining polymer solar cells with a higher open-circuit voltage (V OC). The resulting bulk heterojunction PSC made of the copolymer and [6,6]-phenyl-C71-butyric acid methyl ester (PC 71BM) exhibits a power conversion efficiency (PCE) up to 4.52%, a short circuit current (J SC) of 10.5 mA·cm- 2, and a V OC of 0.86 V. A new donor-acceptor type copolymer containing methyl thiophene-3-carboxylate is designed and synthesized to obtain a lower highest occupied molecular orbital (HOMO) level and strong inter- or intra-molecular interaction between polymers. The photovoltaic device based-on this copolymer exhibits a power conversion efficiency up to 4.52% and an open-circuit voltage of 0.86 V.
Original language | English |
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Pages (from-to) | 146-151 |
Number of pages | 6 |
Journal | Macromolecular Rapid Communications |
Volume | 33 |
Issue number | 2 |
DOIs | |
Publication status | Published - 2012 Jan 27 |
Keywords
- PCBM
- bulk heterojunction
- conjugated polymers
- copolymerization
- polymer solar cells
ASJC Scopus subject areas
- Organic Chemistry
- Polymers and Plastics
- Materials Chemistry