Boosting efficiency and stability of 2D alternating cation perovskite solar cells via rational surface-modification: Marked passivation efficacy of anion

Hualin Zheng; Xuefeng Peng; Tingxi Chen; Ting Zhang; Shihao Yuan; Lei Wang; Feng Qian; Jiang Huang; Xiaodong Liu; Zhi David Chen; Yanning Zhang; Shibin Li

doi:10.1016/j.jechem.2023.05.046

Boosting efficiency and stability of 2D alternating cation perovskite solar cells via rational surface-modification: Marked passivation efficacy of anion

Hualin Zheng, Xuefeng Peng, Tingxi Chen, Ting Zhang, Shihao Yuan, Lei Wang, Feng Qian, Jiang Huang, Xiaodong Liu, Zhi David Chen, Yanning Zhang, Shibin Li

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

23 Scopus citations

Abstract

Two-dimensional (2D) alternating cation (ACI) perovskite surface defects, especially dominant iodine vacancies (V_I) and undercoordinated Pb²⁺, limit the performance of perovskite solar cells (PVSCs). To address the issue, 1-butyl-3-methylimidazolium trifluoro-methane-sulfonate (BMIMOTF) and its iodide counterpart (BMIMI) are utilized to modify the perovskite surface respectively. We find that BMIMI can change the perovskite surface, whereas BMIMOTF shows a nondestructive and more effective defect passivation, giving significantly reduced defect density and suppressed charge-carrier nonradiative recombination. This mainly attributes to the marked passivation efficacy of OTF⁻ anion on V_I and undercoordinated Pb²⁺, rather than BMIMI⁺ cation. Benefiting from the rational surface-modification of BMMIMOTF, the films exhibit an optimized energy level alignment, enhanced hydrophobicity and suppressed ion migration. Consequently, the BMIMOTF-modified devices achieve an impressive efficiency of 21.38% with a record open-circuit voltage of 1.195 V, which is among the best efficiencies reported for 2D PVSCs, and display greatly enhanced humidity and thermal stability.

Original language	English
Pages (from-to)	354-362
Number of pages	9
Journal	Journal of Energy Chemistry
Volume	84
DOIs	https://doi.org/10.1016/j.jechem.2023.05.046
State	Published - Sep 2023

Bibliographical note

Publisher Copyright:
© 2023 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences

Funding

This work was financially supported by the National Natural Science Foundation of China ( 62174021 and 62104028 ), the Creative Research Groups of the National Natural Science Foundation of Sichuan Province ( 2023NSFSC1973 ), the Sichuan Science and Technology Program ( MZGC20230008 ), the Natural Science Foundation of Sichuan Province ( 2022NSFSC0899 ), the China Postdoctoral Science Foundation (2021 M700689 ), the Grant SCITLAB (20012) of Intelligent Terminal Key Laboratory of Sichuan Province, and Fundamental Research Funds for the Central Universities ( ZYGX2019J054 ), the Guangdong Basic and Applied Basic Research Foundation (2019A1515110438). This work was also sponsored by the University of Kentucky and the Sichuan Province Key Laboratory of Display Science and Technology. We extend our sincere gratitude to Prof. Luo Xiao from the University of Electronic Science and Technology of China and Dr. Liu Meng from the Dalian Institute of Chemical Physics, Chinese Academy of Sciences, for their invaluable support in conducting the TA measurements. Furthermore, we would like to express our appreciation to the associate editor and the reviewers for their insightful comments that greatly improved this paper. This work was financially supported by the National Natural Science Foundation of China (62174021 and 62104028), the Creative Research Groups of the National Natural Science Foundation of Sichuan Province (2023NSFSC1973), the Sichuan Science and Technology Program (MZGC20230008), the Natural Science Foundation of Sichuan Province (2022NSFSC0899), the China Postdoctoral Science Foundation (2021M700689), the Grant SCITLAB (20012) of Intelligent Terminal Key Laboratory of Sichuan Province, and Fundamental Research Funds for the Central Universities (ZYGX2019J054), the Guangdong Basic and Applied Basic Research Foundation (2019A1515110438). This work was also sponsored by the University of Kentucky and the Sichuan Province Key Laboratory of Display Science and Technology. We extend our sincere gratitude to Prof. Luo Xiao from the University of Electronic Science and Technology of China and Dr. Liu Meng from the Dalian Institute of Chemical Physics, Chinese Academy of Sciences, for their invaluable support in conducting the TA measurements. Furthermore, we would like to express our appreciation to the associate editor and the reviewers for their insightful comments that greatly improved this paper.

Funders	Funder number
Intelligent Terminal Key Laboratory of Sichuan Province
SCITLAB	20012
Sichuan Province Key Laboratory of Display Science and Technology
University of Kentucky
Sichuan Province Science and Technology Support Program	MZGC20230008
National Natural Science Foundation of China (NSFC)	62104028, 62174021
Chinese Academy of Sciences
China Postdoctoral Science Foundation	2021 M700689
CAS - Dalian Institute of Chemical Physics
University of Electronic Science and Technology of China
Fundamental Research Funds for the Central Universities	ZYGX2019J054
Natural Science Foundation of Sichuan Province	2022NSFSC0899, 2023NSFSC1973
Basic and Applied Basic Research Foundation of Guangdong Province	2019A1515110438

Keywords

2D ACI perovskite solar cells
Charge-carrier nonradiative recombination
Energy level alignment
Ionic migration
Stability
Surface defects passivation

ASJC Scopus subject areas

Fuel Technology
Energy Engineering and Power Technology
Energy (miscellaneous)
Electrochemistry

Access to Document

10.1016/j.jechem.2023.05.046

Cite this

Zheng, H., Peng, X., Chen, T., Zhang, T., Yuan, S., Wang, L., Qian, F., Huang, J., Liu, X., David Chen, Z., Zhang, Y., & Li, S. (2023). Boosting efficiency and stability of 2D alternating cation perovskite solar cells via rational surface-modification: Marked passivation efficacy of anion. Journal of Energy Chemistry, 84, 354-362. https://doi.org/10.1016/j.jechem.2023.05.046

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title = "Boosting efficiency and stability of 2D alternating cation perovskite solar cells via rational surface-modification: Marked passivation efficacy of anion",

abstract = "Two-dimensional (2D) alternating cation (ACI) perovskite surface defects, especially dominant iodine vacancies (VI) and undercoordinated Pb2+, limit the performance of perovskite solar cells (PVSCs). To address the issue, 1-butyl-3-methylimidazolium trifluoro-methane-sulfonate (BMIMOTF) and its iodide counterpart (BMIMI) are utilized to modify the perovskite surface respectively. We find that BMIMI can change the perovskite surface, whereas BMIMOTF shows a nondestructive and more effective defect passivation, giving significantly reduced defect density and suppressed charge-carrier nonradiative recombination. This mainly attributes to the marked passivation efficacy of OTF− anion on VI and undercoordinated Pb2+, rather than BMIMI+ cation. Benefiting from the rational surface-modification of BMMIMOTF, the films exhibit an optimized energy level alignment, enhanced hydrophobicity and suppressed ion migration. Consequently, the BMIMOTF-modified devices achieve an impressive efficiency of 21.38% with a record open-circuit voltage of 1.195 V, which is among the best efficiencies reported for 2D PVSCs, and display greatly enhanced humidity and thermal stability.",

keywords = "2D ACI perovskite solar cells, Charge-carrier nonradiative recombination, Energy level alignment, Ionic migration, Stability, Surface defects passivation",

author = "Hualin Zheng and Xuefeng Peng and Tingxi Chen and Ting Zhang and Shihao Yuan and Lei Wang and Feng Qian and Jiang Huang and Xiaodong Liu and {David Chen}, Zhi and Yanning Zhang and Shibin Li",

note = "Publisher Copyright: {\textcopyright} 2023 Science Press and Dalian Institute of Chemical Physics, Chinese Academy of Sciences",

year = "2023",

month = sep,

doi = "10.1016/j.jechem.2023.05.046",

language = "English",

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Zheng, H, Peng, X, Chen, T, Zhang, T, Yuan, S, Wang, L, Qian, F, Huang, J, Liu, X, David Chen, Z, Zhang, Y & Li, S 2023, 'Boosting efficiency and stability of 2D alternating cation perovskite solar cells via rational surface-modification: Marked passivation efficacy of anion', Journal of Energy Chemistry, vol. 84, pp. 354-362. https://doi.org/10.1016/j.jechem.2023.05.046

TY - JOUR

T1 - Boosting efficiency and stability of 2D alternating cation perovskite solar cells via rational surface-modification

T2 - Marked passivation efficacy of anion

AU - Zheng, Hualin

AU - Peng, Xuefeng

AU - Chen, Tingxi

AU - Zhang, Ting

AU - Yuan, Shihao

AU - Wang, Lei

AU - Qian, Feng

AU - Huang, Jiang

AU - Liu, Xiaodong

AU - David Chen, Zhi

AU - Zhang, Yanning

AU - Li, Shibin

PY - 2023/9

Y1 - 2023/9

N2 - Two-dimensional (2D) alternating cation (ACI) perovskite surface defects, especially dominant iodine vacancies (VI) and undercoordinated Pb2+, limit the performance of perovskite solar cells (PVSCs). To address the issue, 1-butyl-3-methylimidazolium trifluoro-methane-sulfonate (BMIMOTF) and its iodide counterpart (BMIMI) are utilized to modify the perovskite surface respectively. We find that BMIMI can change the perovskite surface, whereas BMIMOTF shows a nondestructive and more effective defect passivation, giving significantly reduced defect density and suppressed charge-carrier nonradiative recombination. This mainly attributes to the marked passivation efficacy of OTF− anion on VI and undercoordinated Pb2+, rather than BMIMI+ cation. Benefiting from the rational surface-modification of BMMIMOTF, the films exhibit an optimized energy level alignment, enhanced hydrophobicity and suppressed ion migration. Consequently, the BMIMOTF-modified devices achieve an impressive efficiency of 21.38% with a record open-circuit voltage of 1.195 V, which is among the best efficiencies reported for 2D PVSCs, and display greatly enhanced humidity and thermal stability.

AB - Two-dimensional (2D) alternating cation (ACI) perovskite surface defects, especially dominant iodine vacancies (VI) and undercoordinated Pb2+, limit the performance of perovskite solar cells (PVSCs). To address the issue, 1-butyl-3-methylimidazolium trifluoro-methane-sulfonate (BMIMOTF) and its iodide counterpart (BMIMI) are utilized to modify the perovskite surface respectively. We find that BMIMI can change the perovskite surface, whereas BMIMOTF shows a nondestructive and more effective defect passivation, giving significantly reduced defect density and suppressed charge-carrier nonradiative recombination. This mainly attributes to the marked passivation efficacy of OTF− anion on VI and undercoordinated Pb2+, rather than BMIMI+ cation. Benefiting from the rational surface-modification of BMMIMOTF, the films exhibit an optimized energy level alignment, enhanced hydrophobicity and suppressed ion migration. Consequently, the BMIMOTF-modified devices achieve an impressive efficiency of 21.38% with a record open-circuit voltage of 1.195 V, which is among the best efficiencies reported for 2D PVSCs, and display greatly enhanced humidity and thermal stability.

KW - 2D ACI perovskite solar cells

KW - Charge-carrier nonradiative recombination

KW - Energy level alignment

KW - Ionic migration

KW - Stability

KW - Surface defects passivation

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SN - 2095-4956

VL - 84

SP - 354

EP - 362

JO - Journal of Energy Chemistry

JF - Journal of Energy Chemistry

ER -

Boosting efficiency and stability of 2D alternating cation perovskite solar cells via rational surface-modification: Marked passivation efficacy of anion

Abstract

Bibliographical note

Funding

Keywords

ASJC Scopus subject areas

Access to Document

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