Journal
ACS NANO
Volume 6, Issue 10, Pages 8735-8745Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nn303724m
Keywords
small molecule; fullerene; photoconductivity; bulk heterojunction; binding energy; additive
Categories
Funding
- Department of Energy
- DOE [DE-FG02-08ER46535]
- Center for Energy Efficient Materials, an Energy Frontier Research Center
- Office of Basic Energy Sciences of the US Department of Energy [DE-DC0001009]
- National Science Foundation [DMR-0856060]
- CSIRO, Australian Research Council through the APD Grant [DP110105341]
- Australian Solar Institute USASEC research exchange program
- Fulbright Post-doctoral Fellowship
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Spectrally dependent steady-state photoconductivity is a convenient method to gain Insight into the charge generation and transport processes within a given material. In this work, we report on the photoconductive response of solution-processed neat films and blends of the fullerene, PC71BM, and the donor-acceptor small-molecule, p-DTS(PTTh2)(2), as function of the processing additive, diiodooctance (DIO). The results, when considered in the context of their structural, optical, and electronic properties give insight into the dominant carrier generation and charge transport mechanisms in each of these molecular systems.
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