Arylammonium-Assisted Reduction of the Open-Circuit Voltage Deficit in Wide-Bandgap Perovskite Solar Cells: The Role of Suppressed Ion Migration
Abstract
Surface treatment using large alkyl/aryl ammonium cations has demonstrated reduced open-circuit voltage (VOC) deficits in perovskite solar cells (PSCs), but the origin of the improvements has been vaguely attributed to defect passivation. Here, we combine the microscopic probing of the local electrical properties, thermal admittance spectroscopic analysis, and first principles calculations to elucidate the critical role of arylammonium interface layers on suppressing the ion migration in wide-bandgap (WBG) PSCs. Our results reveal that arylammonium surface treatment using phenethylammonium iodide increases the activation energy barrier for ion migration on the surface, which suppresses the accumulation of charge defects at surface and grain boundaries (GBs), leading to reduced dark saturation current density in WBG PSCs. Furthermore, with device optimization, our champion 1.73-eV PSC delivers a power conversion efficiency of 19.07% with a VOC of 1.25 V, achieving a VOC-deficit of 0.48 V.
- Authors:
-
[2];
[2];
[2];
[3];
[4];
[2]
- Univ. of Toledo, OH (United States); Wuhan Univ. (China)
- Univ. of Toledo, OH (United States)
- National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Wuhan Univ. (China)
- Publication Date:
- Research Org.:
- Univ. of Toledo, OH (United States); National Renewable Energy Lab. (NREL), Golden, CO (United States)
- Sponsoring Org.:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- OSTI Identifier:
- 1644254
- Alternate Identifier(s):
- OSTI ID: 1677446
- Report Number(s):
- NREL/JA-5K00-78015
Journal ID: ISSN 2380-8195;2380-8195
- Grant/Contract Number:
- EE0008753; AC36-08GO28308
- Resource Type:
- Accepted Manuscript
- Journal Name:
- ACS Energy Letters
- Additional Journal Information:
- Journal Volume: 5; Journal ID: ISSN 2380-8195
- Publisher:
- American Chemical Society (ACS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; Ions; Solar cells; Defects; Electrical conductivity; Perovskites; 41 EE - Solar Energy Technologies Office (EE-4S); activation energy; calculations; conversion efficiency; energy gap; grain boundaries; ions; open circuit voltage; perovskite; spectroscopic analysis; surface treatment; timing circuits
Citation Formats
Chen, Cong, Song, Zhaoning, Xiao, Chuanxiao, Awni, Rasha A., Yao, Canglang, Shrestha, Niraj, Li, Chongwen, Bista, Sandip Singh, Zhang, Yi, Chen, Lei, Ellingson, Randy J., Jiang, Chun-Sheng, Al-Jassim, Mowafak, Fang, Guojia, and Yan, Yanfa. Arylammonium-Assisted Reduction of the Open-Circuit Voltage Deficit in Wide-Bandgap Perovskite Solar Cells: The Role of Suppressed Ion Migration. United States: N. p., 2020.
Web. doi:10.1021/acsenergylett.0c01350.
Chen, Cong, Song, Zhaoning, Xiao, Chuanxiao, Awni, Rasha A., Yao, Canglang, Shrestha, Niraj, Li, Chongwen, Bista, Sandip Singh, Zhang, Yi, Chen, Lei, Ellingson, Randy J., Jiang, Chun-Sheng, Al-Jassim, Mowafak, Fang, Guojia, & Yan, Yanfa. Arylammonium-Assisted Reduction of the Open-Circuit Voltage Deficit in Wide-Bandgap Perovskite Solar Cells: The Role of Suppressed Ion Migration. United States. https://doi.org/10.1021/acsenergylett.0c01350
Chen, Cong, Song, Zhaoning, Xiao, Chuanxiao, Awni, Rasha A., Yao, Canglang, Shrestha, Niraj, Li, Chongwen, Bista, Sandip Singh, Zhang, Yi, Chen, Lei, Ellingson, Randy J., Jiang, Chun-Sheng, Al-Jassim, Mowafak, Fang, Guojia, and Yan, Yanfa. Fri .
"Arylammonium-Assisted Reduction of the Open-Circuit Voltage Deficit in Wide-Bandgap Perovskite Solar Cells: The Role of Suppressed Ion Migration". United States. https://doi.org/10.1021/acsenergylett.0c01350. https://www.osti.gov/servlets/purl/1644254.
@article{osti_1644254,
title = {Arylammonium-Assisted Reduction of the Open-Circuit Voltage Deficit in Wide-Bandgap Perovskite Solar Cells: The Role of Suppressed Ion Migration},
author = {Chen, Cong and Song, Zhaoning and Xiao, Chuanxiao and Awni, Rasha A. and Yao, Canglang and Shrestha, Niraj and Li, Chongwen and Bista, Sandip Singh and Zhang, Yi and Chen, Lei and Ellingson, Randy J. and Jiang, Chun-Sheng and Al-Jassim, Mowafak and Fang, Guojia and Yan, Yanfa},
abstractNote = {Surface treatment using large alkyl/aryl ammonium cations has demonstrated reduced open-circuit voltage (VOC) deficits in perovskite solar cells (PSCs), but the origin of the improvements has been vaguely attributed to defect passivation. Here, we combine the microscopic probing of the local electrical properties, thermal admittance spectroscopic analysis, and first principles calculations to elucidate the critical role of arylammonium interface layers on suppressing the ion migration in wide-bandgap (WBG) PSCs. Our results reveal that arylammonium surface treatment using phenethylammonium iodide increases the activation energy barrier for ion migration on the surface, which suppresses the accumulation of charge defects at surface and grain boundaries (GBs), leading to reduced dark saturation current density in WBG PSCs. Furthermore, with device optimization, our champion 1.73-eV PSC delivers a power conversion efficiency of 19.07% with a VOC of 1.25 V, achieving a VOC-deficit of 0.48 V.},
doi = {10.1021/acsenergylett.0c01350},
journal = {ACS Energy Letters},
number = ,
volume = 5,
place = {United States},
year = {Fri Jul 10 00:00:00 EDT 2020},
month = {Fri Jul 10 00:00:00 EDT 2020}
}
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