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Roles of thermal annealing in cyclopentadithiophene/thienopyrroledione:fullerene blended film and performance of organic photovoltaics
- Source :
-
Solar Energy Materials & Solar Cells . Nov2011, Vol. 95 Issue 11, p3114-3118. 5p. - Publication Year :
- 2011
-
Abstract
- Abstract: The authors have attentively investigated the roles of the thermal annealing in the thin blended film of a novel low band-gap polymer poly[(4,4-bis(2-ethyl)cyclopenta- [2,1-b:3,4-b’]dithiophene)-2,6-diyl-alt-(5-octylthieo[3,4-b]pyrrole-4,6-dione)-1,3-diyl] (PCPDTTPD) and [6,6]-phenyl C60 butyric acid methyl ester (PCBM). The surface morphology, optical absorption spectra and carrier mobility of the PCPDTTPD:PCBM film as a function of annealing temperature were investigated. Open-circuit voltage as high as 0.86V was obtained in the PCPDTTPD:PCBM active layer based organic photovoltaics. The post-deposition annealing effects on the performance of solar cells also have been discussed. The results illustrated that the maximum power conversion efficiency of 2.01% was achieved in the as-cast devices. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 09270248
- Volume :
- 95
- Issue :
- 11
- Database :
- Academic Search Index
- Journal :
- Solar Energy Materials & Solar Cells
- Publication Type :
- Academic Journal
- Accession number :
- 63981011
- Full Text :
- https://doi.org/10.1016/j.solmat.2011.06.045