Abstract
The microstructure, charge transport and charge dynamics in blend films of P3HS:PCBM in comparison with P3HT:PCBM in attempt to identify the reasons for the poorer performance in P3HS:PCBM photovoltaic devices. P3HT:PCBM and P3HS:PCBM films were imaged using micro-Raman spectroscopy mapping in order to compare microstructure and phase separation. Both polymer and polymer:PCBM blend solutions were prepared using chlorobenzene and stirred for 24 h to fully dissolve the polymer. P3HT:PCBM and P3HS:PCBM blend films (1:1) were spin-coated onto quartz substrates from warm solutions. Because of low solubility of P3HS P3HS:PCBM films were spin-coated onto substrates that were 80°C. All films were deposited in a clean room with a filtered air environment. Some blend films were thermally annealed at 140°C for 30 mm in a dry nitrogen environment. The result show that fine control of blend film microstructure through the self-organizing properties of the component materials is essential to realize the potential of new organic photovoltaic materials.
Original language | English (US) |
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Pages (from-to) | 1169-1174 |
Number of pages | 6 |
Journal | Macromolecules |
Volume | 43 |
Issue number | 3 |
DOIs | |
State | Published - Feb 9 2010 |
Externally published | Yes |
ASJC Scopus subject areas
- Materials Chemistry
- Organic Chemistry
- Polymers and Plastics
- Inorganic Chemistry