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Solution-processed BiI3 thin films for photovoltaic applications [electronic resource] : Improved carrier collection via solvent annealing

Published:
Washington, D.C. : United States. Dept. of Energy. Office of Basic Energy Sciences, 2016.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
Physical Description:
pages 6,567-6,574 : digital, PDF file
Additional Creators:
Ames Laboratory, United States. Department of Energy. Office of Basic Energy Sciences, United States. Office of Science, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary:
Here, we report all-inorganic solar cells based on solution-processed BiI3. Two-electron donor solvents such as tetrahydrofuran and dimethylformamide were found to form adducts with BiI3, which make them highly soluble in these solvents. BiI3 thin films were deposited by spin-coating. Solvent annealing BiI3 thin films at relatively low temperatures (≤100 °C) resulted in increased grain size and crystallographic reorientation of grains within the films. The BiI3 films were stable against oxidation for several months and could withstand several hours of annealing in air at temperatures below 150 °C without degradation. Surface oxidation was found to improve photovoltaic device performance due to the formation of a BiOI layer at the BiI3 surface which facilitated hole extraction. Nonoptimized BiI3 solar cells achieved the highest power conversion efficiencies of 1.0%, demonstrating the potential of BiI3 as a nontoxic, air-stable metal-halide absorber material for photovoltaic applications.
Report Numbers:
E 1.99:is-j--9138
is-j--9138
Subject(s):
Note:
Published through SciTech Connect.
08/26/2016.
"is-j--9138"
Chemistry of Materials 28 18 ISSN 0897-4756 AM
Hamdeh, Umar H. [Iowa State Univ., Ames, IA (United States)]; Nelson, Rainie D. [Iowa State Univ., Ames, IA (United States)]; Ryan, Bradley J. [Iowa State Univ., Ames, IA (United States)]; Bhattacharjee, Ujjal [Iowa State Univ., Ames, IA (United States); Ames Lab., Ames, IA (United States)]; Petrich, Jacob W. [Iowa State Univ., Ames, IA (United States); Ames Lab., Ames, IA (United States)]; Panthani, Matthew G. [Iowa State Univ., Ames, IA (United States)].
Funding Information:
AC02-07CH11358
View MARC record | catkey: 23757796