Ammonium Thiocyanate Enhanced High-Performance Quasi-Two-Dimensional Perovskite Solar Cells

Wenqiang Li; Shuo Ding; Jingcheng Xu; Chunyan Wu; Xinjian Li; Lei Qian; Hao Chen; Xinyu Zhang; Kai Kang; Chaoyu Xiang

doi:10.1021/acsaem.3c02624

Ammonium Thiocyanate Enhanced High-Performance Quasi-Two-Dimensional Perovskite Solar Cells

Wenqiang Li, Shuo Ding, Jingcheng Xu, Chunyan Wu, Xinjian Li, Lei Qian, Hao Chen, Xinyu Zhang, Kai Kang, Chaoyu Xiang

Department of Mechanical, Materials and Manufacturing Engineering

Research output: Journal Publication › Article › peer-review

Abstract

The quality of the tin oxide (SnO₂)/perovskite interface has become eminently critical for high-efficiency and stable quasi-two-dimensional (Q2D) perovskite solar cells (PSCs). Based on this, we propose the application of a multifunctional passivator, ammonium thiocyanate (NH₄SCN), to treat the SnO₂/perovskite interface of Q2D PSCs. It can passivate oxygen vacancies effectively by the interaction of the highly electronegative thiocyanate with uncoordinated Sn, thereby reducing interfacial defects and regulating energy levels. In addition, the use of NH₄SCN improves the wettability of perovskite precursors on tin oxide films, thus enhancing the quality of perovskite films. The strategy of NH₄SCN interfacial passivation shows better energy level matching and consequently a higher photoelectric conversion efficiency (PCE) compared to the conventional method as an additive. The improved devices achieved a maximum PCE of 21.96%, an impressive stability of sustaining 90% of the initial PCE after 3000 h in the ambient condition.

Original language	English
Pages (from-to)	1120-1127
Number of pages	8
Journal	ACS Applied Energy Materials
Volume	7
Issue number	3
DOIs	https://doi.org/10.1021/acsaem.3c02624
Publication status	Published - 12 Feb 2024

Keywords

ammonium thiocyanate
interfacial passivation
quasi-two-dimensional perovskite
solar cells
tin oxide

ASJC Scopus subject areas

Chemical Engineering (miscellaneous)
Energy Engineering and Power Technology
Electrochemistry
Materials Chemistry
Electrical and Electronic Engineering

UN SDGs

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

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10.1021/acsaem.3c02624

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title = "Ammonium Thiocyanate Enhanced High-Performance Quasi-Two-Dimensional Perovskite Solar Cells",

abstract = "The quality of the tin oxide (SnO2)/perovskite interface has become eminently critical for high-efficiency and stable quasi-two-dimensional (Q2D) perovskite solar cells (PSCs). Based on this, we propose the application of a multifunctional passivator, ammonium thiocyanate (NH4SCN), to treat the SnO2/perovskite interface of Q2D PSCs. It can passivate oxygen vacancies effectively by the interaction of the highly electronegative thiocyanate with uncoordinated Sn, thereby reducing interfacial defects and regulating energy levels. In addition, the use of NH4SCN improves the wettability of perovskite precursors on tin oxide films, thus enhancing the quality of perovskite films. The strategy of NH4SCN interfacial passivation shows better energy level matching and consequently a higher photoelectric conversion efficiency (PCE) compared to the conventional method as an additive. The improved devices achieved a maximum PCE of 21.96%, an impressive stability of sustaining 90% of the initial PCE after 3000 h in the ambient condition.",

keywords = "ammonium thiocyanate, interfacial passivation, quasi-two-dimensional perovskite, solar cells, tin oxide",

author = "Wenqiang Li and Shuo Ding and Jingcheng Xu and Chunyan Wu and Xinjian Li and Lei Qian and Hao Chen and Xinyu Zhang and Kai Kang and Chaoyu Xiang",

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year = "2024",

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doi = "10.1021/acsaem.3c02624",

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TY - JOUR

T1 - Ammonium Thiocyanate Enhanced High-Performance Quasi-Two-Dimensional Perovskite Solar Cells

AU - Li, Wenqiang

AU - Ding, Shuo

AU - Xu, Jingcheng

AU - Wu, Chunyan

AU - Li, Xinjian

AU - Qian, Lei

AU - Chen, Hao

AU - Zhang, Xinyu

AU - Kang, Kai

AU - Xiang, Chaoyu

PY - 2024/2/12

Y1 - 2024/2/12

N2 - The quality of the tin oxide (SnO2)/perovskite interface has become eminently critical for high-efficiency and stable quasi-two-dimensional (Q2D) perovskite solar cells (PSCs). Based on this, we propose the application of a multifunctional passivator, ammonium thiocyanate (NH4SCN), to treat the SnO2/perovskite interface of Q2D PSCs. It can passivate oxygen vacancies effectively by the interaction of the highly electronegative thiocyanate with uncoordinated Sn, thereby reducing interfacial defects and regulating energy levels. In addition, the use of NH4SCN improves the wettability of perovskite precursors on tin oxide films, thus enhancing the quality of perovskite films. The strategy of NH4SCN interfacial passivation shows better energy level matching and consequently a higher photoelectric conversion efficiency (PCE) compared to the conventional method as an additive. The improved devices achieved a maximum PCE of 21.96%, an impressive stability of sustaining 90% of the initial PCE after 3000 h in the ambient condition.

AB - The quality of the tin oxide (SnO2)/perovskite interface has become eminently critical for high-efficiency and stable quasi-two-dimensional (Q2D) perovskite solar cells (PSCs). Based on this, we propose the application of a multifunctional passivator, ammonium thiocyanate (NH4SCN), to treat the SnO2/perovskite interface of Q2D PSCs. It can passivate oxygen vacancies effectively by the interaction of the highly electronegative thiocyanate with uncoordinated Sn, thereby reducing interfacial defects and regulating energy levels. In addition, the use of NH4SCN improves the wettability of perovskite precursors on tin oxide films, thus enhancing the quality of perovskite films. The strategy of NH4SCN interfacial passivation shows better energy level matching and consequently a higher photoelectric conversion efficiency (PCE) compared to the conventional method as an additive. The improved devices achieved a maximum PCE of 21.96%, an impressive stability of sustaining 90% of the initial PCE after 3000 h in the ambient condition.

KW - ammonium thiocyanate

KW - interfacial passivation

KW - quasi-two-dimensional perovskite

KW - solar cells

KW - tin oxide

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U2 - 10.1021/acsaem.3c02624

DO - 10.1021/acsaem.3c02624

M3 - Article

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SN - 2574-0962

VL - 7

SP - 1120

EP - 1127

JO - ACS Applied Energy Materials

JF - ACS Applied Energy Materials

IS - 3

ER -

Ammonium Thiocyanate Enhanced High-Performance Quasi-Two-Dimensional Perovskite Solar Cells

Abstract

Keywords

ASJC Scopus subject areas

UN SDGs

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