Journal
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
Volume 132, Issue 12, Pages 4060-+Publisher
AMER CHEMICAL SOC
DOI: 10.1021/ja100249m
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Funding
- National Science Foundation [DMR-0906745]
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-SC0001013]
- Center for Advanced Molecular Photovoltaics (CAMP) [KUS-C1-015-21]
- King Abdullah University of Science and Technology (KAUST)
- Global Photonic Energy Corporation
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Nanocrystals of phase-pure tin(II) selenide (SnSe) were synthesized via a solution-phase route employing stoichiometric amounts of di-tert-butyl diselenide as a novel and facile selenium source. The direct band gap of the resulting nanocrystals (E-g = 1.71 eV) is significantly blue-shifted relative to the bulk value (E-g = 1.30 eV), a likely consequence of quantum confinement resulting from the relatively small average diameter of the nanocrystals (mu(D) < 20 nm). Preliminary solar cell devices incorporating SnSe nanocrystals into a poly[2-methoxy-5-(3',7'-dimethyloctyloxy)-1,4-phenylenevinylene] matrix demonstrate a significant enhancement in quantum efficiency and short-circuit current density, suggesting that this earth-abundant material could be a valuable component in future photovoltaic devices.
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