Arylammonium-Assisted Reduction of the Open-Circuit Voltage Deficit in Wide-Bandgap Perovskite Solar Cells: The Role of Suppressed Ion Migration

Cong Chen; Zhaoning Song; Chuanxiao Xiao; Rasha Awni; Canglang Yao; Niraj Shrestha; Congwen Li; Sandip Singh Bista; Yi Zhang; Lei Chen; Randy Ellingson; Chun-Sheng Jiang; Mowafak Al-Jassim; Guojia Fang; Yanfa Yan

doi:10.1021/acsenergylett.0c01350

Arylammonium-Assisted Reduction of the Open-Circuit Voltage Deficit in Wide-Bandgap Perovskite Solar Cells: The Role of Suppressed Ion Migration

Cong Chen, Zhaoning Song, Chuanxiao Xiao, Rasha Awni, Canglang Yao, Niraj Shrestha, Congwen Li, Sandip Singh Bista, Yi Zhang, Lei Chen, Randy Ellingson, Chun-Sheng Jiang, Mowafak Al-Jassim, Guojia Fang, Yanfa Yan

Materials Science

Research output: Contribution to journal › Article › peer-review

148 Scopus Citations

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 microscopic probing of the local electrical properties, thermal admittance spectroscopic analysis, and first-principles calculations to elucidate the critical role of arylammonium interface layers in suppressing 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, leading to a reduced dark saturation current density in WBG PSCs. 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.

Original language	American English
Pages (from-to)	2560-2568
Number of pages	9
Journal	ACS Energy Letters
Volume	5
Issue number	8
DOIs	https://doi.org/10.1021/acsenergylett.0c01350 https://doi.org/10.1021/acsenergylett.0c01350
State	Published - 14 Aug 2020

Bibliographical note

Publisher Copyright:
© 2020 American Chemical Society.

NREL Publication Number

NREL/JA-5K00-78015

Keywords

activation energy
calculations
conversion efficiency
energy gap
grain boundaries
ions
open circuit voltage
perovskite
spectroscopic analysis
surface treatment
timing circuits

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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Chen, C., Song, Z., Xiao, C., Awni, R., Yao, C., Shrestha, N., Li, C., Singh Bista, S., Zhang, Y., Chen, L., Ellingson, R., Jiang, C.-S., Al-Jassim, M., Fang, G., & Yan, Y. (2020). Arylammonium-Assisted Reduction of the Open-Circuit Voltage Deficit in Wide-Bandgap Perovskite Solar Cells: The Role of Suppressed Ion Migration. ACS Energy Letters, 5(8), 2560-2568. https://doi.org/10.1021/acsenergylett.0c01350, https://doi.org/10.1021/acsenergylett.0c01350

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title = "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 microscopic probing of the local electrical properties, thermal admittance spectroscopic analysis, and first-principles calculations to elucidate the critical role of arylammonium interface layers in suppressing 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, leading to a reduced dark saturation current density in WBG PSCs. 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.",

keywords = "activation energy, calculations, conversion efficiency, energy gap, grain boundaries, ions, open circuit voltage, perovskite, spectroscopic analysis, surface treatment, timing circuits",

author = "Cong Chen and Zhaoning Song and Chuanxiao Xiao and Rasha Awni and Canglang Yao and Niraj Shrestha and Congwen Li and {Singh Bista}, Sandip and Yi Zhang and Lei Chen and Randy Ellingson and Chun-Sheng Jiang and Mowafak Al-Jassim and Guojia Fang and Yanfa Yan",

note = "Publisher Copyright: {\textcopyright} 2020 American Chemical Society.",

year = "2020",

month = aug,

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doi = "10.1021/acsenergylett.0c01350",

language = "American English",

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Chen, C, Song, Z, Xiao, C, Awni, R, Yao, C, Shrestha, N, Li, C, Singh Bista, S, Zhang, Y, Chen, L, Ellingson, R, Jiang, C-S , Al-Jassim, M, Fang, G & Yan, Y 2020, 'Arylammonium-Assisted Reduction of the Open-Circuit Voltage Deficit in Wide-Bandgap Perovskite Solar Cells: The Role of Suppressed Ion Migration', ACS Energy Letters, vol. 5, no. 8, pp. 2560-2568. https://doi.org/10.1021/acsenergylett.0c01350, https://doi.org/10.1021/acsenergylett.0c01350

TY - JOUR

T1 - Arylammonium-Assisted Reduction of the Open-Circuit Voltage Deficit in Wide-Bandgap Perovskite Solar Cells: The Role of Suppressed Ion Migration

AU - Chen, Cong

AU - Song, Zhaoning

AU - Xiao, Chuanxiao

AU - Awni, Rasha

AU - Yao, Canglang

AU - Shrestha, Niraj

AU - Li, Congwen

AU - Singh Bista, Sandip

AU - Zhang, Yi

AU - Chen, Lei

AU - Ellingson, Randy

AU - Jiang, Chun-Sheng

AU - Al-Jassim, Mowafak

AU - Fang, Guojia

AU - Yan, Yanfa

PY - 2020/8/14

Y1 - 2020/8/14

N2 - 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 microscopic probing of the local electrical properties, thermal admittance spectroscopic analysis, and first-principles calculations to elucidate the critical role of arylammonium interface layers in suppressing 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, leading to a reduced dark saturation current density in WBG PSCs. 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.

AB - 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 microscopic probing of the local electrical properties, thermal admittance spectroscopic analysis, and first-principles calculations to elucidate the critical role of arylammonium interface layers in suppressing 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, leading to a reduced dark saturation current density in WBG PSCs. 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.

KW - activation energy

KW - calculations

KW - conversion efficiency

KW - energy gap

KW - grain boundaries

KW - ions

KW - open circuit voltage

KW - perovskite

KW - spectroscopic analysis

KW - surface treatment

KW - timing circuits

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U2 - 10.1021/acsenergylett.0c01350

DO - 10.1021/acsenergylett.0c01350

M3 - Article

AN - SCOPUS:85090942558

SN - 2380-8195

VL - 5

SP - 2560

EP - 2568

JO - ACS Energy Letters

JF - ACS Energy Letters

IS - 8

ER -

Arylammonium-Assisted Reduction of the Open-Circuit Voltage Deficit in Wide-Bandgap Perovskite Solar Cells: The Role of Suppressed Ion Migration

Abstract

Bibliographical note

NREL Publication Number

Keywords

UN SDGs

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