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Title: Synergistic effects of lead thiocyanate additive and solvent annealing on the performance of wide-bandgap perovskite solar cells

Here, we show that the cooperation of lead thiocyanate additive and a solvent annealing process can effectively increase the grain size of mixed-cation lead mixed-halide perovskite thin films while avoiding excess lead iodide formation. As a result, the average grain size of the wide-bandgap mixed-cation lead perovskite thin films increases from 66 ± 24 to 1036 ± 111 nm, and the mean carrier lifetime shows a more than 3-fold increase, from 330 ns to over 1000 ns. Consequently, the average open-circuit voltage of wide-bandgap perovskite solar cells increases by 80 (70) mV, and the average power conversion efficiency (PCE) increases from 13.44 ± 0.48 (11.75 ± 0.34) to 17.68 ± 0.36 (15.58 ± 0.55)% when measured under reverse (forward) voltage scans. The best-performing wide-bandgap perovskite solar cell, with a bandgap of 1.75 eV, achieves a stabilized PCE of 17.18%.
Authors:
 [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ;  [1] ; ORCiD logo [2] ;  [1] ; ORCiD logo [1]
  1. Univ. of Toledo, Toledo, OH (United States)
  2. National Renewable Energy Lab. (NREL), Golden, CO (United States)
Publication Date:
Report Number(s):
NREL/JA-5900-68289
Journal ID: ISSN 2380-8195
Grant/Contract Number:
AC36-08GO28308
Type:
Accepted Manuscript
Journal Name:
ACS Energy Letters
Additional Journal Information:
Journal Volume: 2; Journal Issue: 5; Journal ID: ISSN 2380-8195
Publisher:
American Chemical Society (ACS)
Research Org:
National Renewable Energy Lab. (NREL), Golden, CO (United States)
Sponsoring Org:
USDOE Office of Energy Efficiency and Renewable Energy (EERE), Solar Energy Technologies Office (EE-4S)
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; perovskite solar cells; lead thiocyanate additive; annealing; thin films
OSTI Identifier:
1357886

Yu, Yue, Wang, Changlei, Grice, Corey R., Shrestha, Niraj, Zhao, Dewei, Liao, Weiqiang, Guan, Lei, Awni, Rasha A., Meng, Weiwei, Cimaroli, Alexander J., Zhu, Kai, Ellingson, Randy J., and Yan, Yanfa. Synergistic effects of lead thiocyanate additive and solvent annealing on the performance of wide-bandgap perovskite solar cells. United States: N. p., Web. doi:10.1021/acsenergylett.7b00278.
Yu, Yue, Wang, Changlei, Grice, Corey R., Shrestha, Niraj, Zhao, Dewei, Liao, Weiqiang, Guan, Lei, Awni, Rasha A., Meng, Weiwei, Cimaroli, Alexander J., Zhu, Kai, Ellingson, Randy J., & Yan, Yanfa. Synergistic effects of lead thiocyanate additive and solvent annealing on the performance of wide-bandgap perovskite solar cells. United States. doi:10.1021/acsenergylett.7b00278.
Yu, Yue, Wang, Changlei, Grice, Corey R., Shrestha, Niraj, Zhao, Dewei, Liao, Weiqiang, Guan, Lei, Awni, Rasha A., Meng, Weiwei, Cimaroli, Alexander J., Zhu, Kai, Ellingson, Randy J., and Yan, Yanfa. 2017. "Synergistic effects of lead thiocyanate additive and solvent annealing on the performance of wide-bandgap perovskite solar cells". United States. doi:10.1021/acsenergylett.7b00278. https://www.osti.gov/servlets/purl/1357886.
@article{osti_1357886,
title = {Synergistic effects of lead thiocyanate additive and solvent annealing on the performance of wide-bandgap perovskite solar cells},
author = {Yu, Yue and Wang, Changlei and Grice, Corey R. and Shrestha, Niraj and Zhao, Dewei and Liao, Weiqiang and Guan, Lei and Awni, Rasha A. and Meng, Weiwei and Cimaroli, Alexander J. and Zhu, Kai and Ellingson, Randy J. and Yan, Yanfa},
abstractNote = {Here, we show that the cooperation of lead thiocyanate additive and a solvent annealing process can effectively increase the grain size of mixed-cation lead mixed-halide perovskite thin films while avoiding excess lead iodide formation. As a result, the average grain size of the wide-bandgap mixed-cation lead perovskite thin films increases from 66 ± 24 to 1036 ± 111 nm, and the mean carrier lifetime shows a more than 3-fold increase, from 330 ns to over 1000 ns. Consequently, the average open-circuit voltage of wide-bandgap perovskite solar cells increases by 80 (70) mV, and the average power conversion efficiency (PCE) increases from 13.44 ± 0.48 (11.75 ± 0.34) to 17.68 ± 0.36 (15.58 ± 0.55)% when measured under reverse (forward) voltage scans. The best-performing wide-bandgap perovskite solar cell, with a bandgap of 1.75 eV, achieves a stabilized PCE of 17.18%.},
doi = {10.1021/acsenergylett.7b00278},
journal = {ACS Energy Letters},
number = 5,
volume = 2,
place = {United States},
year = {2017},
month = {4}
}