Journal
CHEMPHYSCHEM
Volume 16, Issue 4, Pages 842-847Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cphc.201402815
Keywords
charge transport; kinetics; perovskite phases; solar cells; thermodynamics
Funding
- Beijing Science and Technology Committee [Z131100006013003]
- National Key Basic Research Program [2012CB932903]
- Natural Science Foundation of China [51372270, 51372272, 21173260, 11474333, 91433205, 51421002, 91233202]
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Carrier density and transport properties in the CH3NH3PbI3 thin film have been investigated. It is found that the carrier density, the depletion field, and the charge collection and transport properties in the CH3NH3PbI3 absorber film can be controlled effectively by different concentrations of reactants. That is, the carrier properties and the self-doping characteristics in CH3NH3PbI3 films are strongly influenced by the reaction thermodynamic and kinetic processes. Furthermore, by employing mixed solvents with ethanol and isopropanol to deposit the CH3NH3PbI3 film, the charge collection and transport efficiencies are improved significantly, thereby yielding an overall enhanced cell performance.
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