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Benzothiadiazole Versus Thiophene: Influence of the Auxiliary Acceptor on the Photovoltaic Properties of Donor-Acceptor-Based Copolymers.
- Source :
-
Macromolecular Rapid Communications . Jan2018, Vol. 39 Issue 2, p1-6. 6p. - Publication Year :
- 2018
-
Abstract
- Two donor-acceptor (D-A) type conjugated copolymers, P1 and P2, are designed and synthesized. A classical benzothiadiazole acceptor is used to replace a thiophene unit in the polymer chain of P1 to obtain P2 terpolymer. Compared with P1, P2 exhibits broader absorption spectra, higher absorption coefficient, deeper lowest unoccupied molecular orbital level, and a relatively lower band gap. As a result, the P2-based solar cell exhibits a high power conversion efficiency (PCE) of 6.60%, with a short-circuit current (Jsc) of 12.43 mA cm-2, and a fill factor (FF) of 73.1%, which are higher than those of the P1-based device with a PCE of 4.70%, aJsc of 9.43 mA cm-2, and an FF of 61.6%. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 10221336
- Volume :
- 39
- Issue :
- 2
- Database :
- Academic Search Index
- Journal :
- Macromolecular Rapid Communications
- Publication Type :
- Academic Journal
- Accession number :
- 127592012
- Full Text :
- https://doi.org/10.1002/marc.201700547