Journal
ADVANCED MATERIALS
Volume 27, Issue 40, Pages 6296-6302Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.201502645
Keywords
morphology; small-molecule-based solar cells; solvent vapor annealing
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Funding
- MoST [2014CB643502]
- NSFC [51373078, 51422304, 91433101]
- PCSIRT [IRT1257]
- Tianjin City [13RCGFGX01121]
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A series of solvents with different solubilities for DR3TBDTT and PC71BM, and different boiling points, is used for solvent vapor annealing (SVA) treatment to systematically investigate the solvent-morphologyperformance relationship. The presence of solvent molecules inside bulk-heterojunction (BHJ) thin films promotes the mobility of both donor and acceptor molecules, leading to crystallization and aggregation, which are important in modulating morphology.
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