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Charge formation and transport in bulk-heterojunction solar cells based on alternating polyfluorene copolymers blended with fullerenes
- Source :
- Organic Electronics. 7:235-242
- Publication Year :
- 2006
- Publisher :
- Elsevier BV, 2006.
-
Abstract
- We investigate charge formation in bulk-heterojunction solar cells based on conjugated polymers in the form of alternating polyfluorene copolymers and the methanofullerene PCBM. Using transient absorption spectroscopy we show that optimal charge formation is obtained with 20-50 wt% PCBM. This is in contrast to the maximum short circuit current density obtained at similar to 80 wt% PCBM as determined by steady state current density-voltage characterization. Hence, we show explicitly that the solar cell performance of these interpenetrating polymer networks containing PCBM is limited by charge transport rather than by formation of charges. (c) 2006 Elsevier B.V. All rights reserved.
- Subjects :
- chemistry.chemical_classification
Fullerene
Analytical chemistry
Heterojunction
General Chemistry
Polymer
Condensed Matter Physics
Polymer solar cell
Electronic, Optical and Magnetic Materials
law.invention
Biomaterials
Polyfluorene
chemistry.chemical_compound
Chemical engineering
chemistry
law
Solar cell
Ultrafast laser spectroscopy
Materials Chemistry
Electrical and Electronic Engineering
Short circuit
Subjects
Details
- ISSN :
- 15661199
- Volume :
- 7
- Database :
- OpenAIRE
- Journal :
- Organic Electronics
- Accession number :
- edsair.doi...........4a6aa47f886b499f06db1d05ea8937af