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Title: Solution-processed BiI 3 thin films for photovoltaic applications: Improved carrier collection via solvent annealing

Here, we report all-inorganic solar cells based on solution-processed BiI 3. Two-electron donor solvents such as tetrahydrofuran and dimethylformamide were found to form adducts with BiI 3, which make them highly soluble in these solvents. BiI 3 thin films were deposited by spin-coating. Solvent annealing BiI 3 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 BiI 3 surface which facilitated hole extraction. Nonoptimized BiI 3 solar cells achieved the highest power conversion efficiencies of 1.0%, demonstrating the potential of BiI 3 as a nontoxic, air-stable metal-halide absorber material for photovoltaic applications.
Authors:
 [1] ;  [1] ;  [1] ;  [1] ;  [2] ;  [1] ;  [2] ;  [1]
  1. Iowa State Univ., Ames, IA (United States)
  2. (United States)
Publication Date:
Report Number(s):
IS-J-9138
Journal ID: ISSN 0897-4756
Grant/Contract Number:
AC02-07CH11358
Type:
Accepted Manuscript
Journal Name:
Chemistry of Materials
Additional Journal Information:
Journal Volume: 28; Journal Issue: 18; Journal ID: ISSN 0897-4756
Publisher:
American Chemical Society (ACS)
Research Org:
Ames Laboratory (AMES), Ames, IA (United States)
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); USDOE Office of Science (SC), Workforce Development for Teachers and Scientists (WDTS) (SC-27)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
OSTI Identifier:
1337669

Hamdeh, Umar H., Nelson, Rainie D., Ryan, Bradley J., Bhattacharjee, Ujjal, Ames Lab., Ames, IA, Petrich, Jacob W., Ames Lab., Ames, IA, and Panthani, Matthew G.. Solution-processed BiI3 thin films for photovoltaic applications: Improved carrier collection via solvent annealing. United States: N. p., Web. doi:10.1021/acs.chemmater.6b02347.
Hamdeh, Umar H., Nelson, Rainie D., Ryan, Bradley J., Bhattacharjee, Ujjal, Ames Lab., Ames, IA, Petrich, Jacob W., Ames Lab., Ames, IA, & Panthani, Matthew G.. Solution-processed BiI3 thin films for photovoltaic applications: Improved carrier collection via solvent annealing. United States. doi:10.1021/acs.chemmater.6b02347.
Hamdeh, Umar H., Nelson, Rainie D., Ryan, Bradley J., Bhattacharjee, Ujjal, Ames Lab., Ames, IA, Petrich, Jacob W., Ames Lab., Ames, IA, and Panthani, Matthew G.. 2016. "Solution-processed BiI3 thin films for photovoltaic applications: Improved carrier collection via solvent annealing". United States. doi:10.1021/acs.chemmater.6b02347. https://www.osti.gov/servlets/purl/1337669.
@article{osti_1337669,
title = {Solution-processed BiI3 thin films for photovoltaic applications: Improved carrier collection via solvent annealing},
author = {Hamdeh, Umar H. and Nelson, Rainie D. and Ryan, Bradley J. and Bhattacharjee, Ujjal and Ames Lab., Ames, IA and Petrich, Jacob W. and Ames Lab., Ames, IA and Panthani, Matthew G.},
abstractNote = {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.},
doi = {10.1021/acs.chemmater.6b02347},
journal = {Chemistry of Materials},
number = 18,
volume = 28,
place = {United States},
year = {2016},
month = {8}
}