Two-step perovskite crystallization assisted with F-containing additives enables over 23% efficiency in perovskite solar cells

Chuangjin Liu; Xueqing Xu; Zhenlin Zhang; Shuguang Cao; Jin Han; Yupeng Zheng; Zhuoneng Bi; Yanqing Zhu; Shizi Luo; Gang Xu; Shengzhong(Frank) Liu; Kai Wang; Zhiwei Ren; Gang Li; Qiting Deng; Jieling Liu

doi:10.1016/j.jssc.2023.124195

Two-step perovskite crystallization assisted with F-containing additives enables over 23% efficiency in perovskite solar cells

Chuangjin Liu, Xueqing Xu, Zhenlin Zhang, Shuguang Cao, Jin Han, Yupeng Zheng, Zhuoneng Bi, Yanqing Zhu, Shizi Luo, Gang Xu, Shengzhong(Frank) Liu, Kai Wang, Zhiwei Ren, Gang Li, Qiting Deng, Jieling Liu

Research output: Journal article publication › Journal article › Academic research › peer-review

3 Citations (Scopus)

Abstract

The two-step preparation of perovskite solar cells (PSCs) has attracted the interest of many researchers because this method can better control the nucleation and growth of perovskite thin films. This work proposes a crystallization management strategy to improve the quality of active layer with the assistant of F-containing additives with low boiling point. Hexafluorobenzene (HFB) is introduced into lead iodide (PbI₂) precursor solutions, and HFB aggregation forms due to its low surface energies. As the result, nano porous PbI₂ films are obtained after the evaporation of HFB during annealing process, leading to pinhole free perovskite films with large grain size and low defect states. As the consequence, the best power conversion efficiency (PCE) of 23.01% is obtained for the PSCs with HFB assisted perovskite films. Meanwhile HFB modified unencapsulated device maintains 88% of its initial PCE after aging for over 1440 h at 25 °C and 30% relative humidity in ambient conditions.

Original language	English
Article number	124195
Journal	Journal of Solid State Chemistry
Volume	326
DOIs	https://doi.org/10.1016/j.jssc.2023.124195
Publication status	Published - Oct 2023

Keywords

Crystallization management strategy
Hexafluorobenzene
PbI layer morphology
perovskite solar cells

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Condensed Matter Physics
Physical and Theoretical Chemistry
Inorganic Chemistry
Materials Chemistry

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10.1016/j.jssc.2023.124195

Cite this

Liu, C., Xu, X., Zhang, Z., Cao, S., Han, J., Zheng, Y., Bi, Z., Zhu, Y., Luo, S., Xu, G., Liu, SF., Wang, K., Ren, Z., Li, G., Deng, Q., & Liu, J. (2023). Two-step perovskite crystallization assisted with F-containing additives enables over 23% efficiency in perovskite solar cells. Journal of Solid State Chemistry, 326, Article 124195. https://doi.org/10.1016/j.jssc.2023.124195

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title = "Two-step perovskite crystallization assisted with F-containing additives enables over 23% efficiency in perovskite solar cells",

abstract = "The two-step preparation of perovskite solar cells (PSCs) has attracted the interest of many researchers because this method can better control the nucleation and growth of perovskite thin films. This work proposes a crystallization management strategy to improve the quality of active layer with the assistant of F-containing additives with low boiling point. Hexafluorobenzene (HFB) is introduced into lead iodide (PbI2) precursor solutions, and HFB aggregation forms due to its low surface energies. As the result, nano porous PbI2 films are obtained after the evaporation of HFB during annealing process, leading to pinhole free perovskite films with large grain size and low defect states. As the consequence, the best power conversion efficiency (PCE) of 23.01% is obtained for the PSCs with HFB assisted perovskite films. Meanwhile HFB modified unencapsulated device maintains 88% of its initial PCE after aging for over 1440 h at 25 °C and 30% relative humidity in ambient conditions.",

keywords = "Crystallization management strategy, Hexafluorobenzene, PbI layer morphology, perovskite solar cells",

author = "Chuangjin Liu and Xueqing Xu and Zhenlin Zhang and Shuguang Cao and Jin Han and Yupeng Zheng and Zhuoneng Bi and Yanqing Zhu and Shizi Luo and Gang Xu and Shengzhong(Frank) Liu and Kai Wang and Zhiwei Ren and Gang Li and Qiting Deng and Jieling Liu",

note = "Publisher Copyright: {\textcopyright} 2023",

year = "2023",

month = oct,

doi = "10.1016/j.jssc.2023.124195",

language = "English",

volume = "326",

journal = "Journal of Solid State Chemistry",

issn = "0022-4596",

publisher = "Academic Press Inc.",

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TY - JOUR

T1 - Two-step perovskite crystallization assisted with F-containing additives enables over 23% efficiency in perovskite solar cells

AU - Liu, Chuangjin

AU - Xu, Xueqing

AU - Zhang, Zhenlin

AU - Cao, Shuguang

AU - Han, Jin

AU - Zheng, Yupeng

AU - Bi, Zhuoneng

AU - Zhu, Yanqing

AU - Luo, Shizi

AU - Xu, Gang

AU - Liu, Shengzhong(Frank)

AU - Wang, Kai

AU - Ren, Zhiwei

AU - Li, Gang

AU - Deng, Qiting

AU - Liu, Jieling

PY - 2023/10

Y1 - 2023/10

N2 - The two-step preparation of perovskite solar cells (PSCs) has attracted the interest of many researchers because this method can better control the nucleation and growth of perovskite thin films. This work proposes a crystallization management strategy to improve the quality of active layer with the assistant of F-containing additives with low boiling point. Hexafluorobenzene (HFB) is introduced into lead iodide (PbI2) precursor solutions, and HFB aggregation forms due to its low surface energies. As the result, nano porous PbI2 films are obtained after the evaporation of HFB during annealing process, leading to pinhole free perovskite films with large grain size and low defect states. As the consequence, the best power conversion efficiency (PCE) of 23.01% is obtained for the PSCs with HFB assisted perovskite films. Meanwhile HFB modified unencapsulated device maintains 88% of its initial PCE after aging for over 1440 h at 25 °C and 30% relative humidity in ambient conditions.

AB - The two-step preparation of perovskite solar cells (PSCs) has attracted the interest of many researchers because this method can better control the nucleation and growth of perovskite thin films. This work proposes a crystallization management strategy to improve the quality of active layer with the assistant of F-containing additives with low boiling point. Hexafluorobenzene (HFB) is introduced into lead iodide (PbI2) precursor solutions, and HFB aggregation forms due to its low surface energies. As the result, nano porous PbI2 films are obtained after the evaporation of HFB during annealing process, leading to pinhole free perovskite films with large grain size and low defect states. As the consequence, the best power conversion efficiency (PCE) of 23.01% is obtained for the PSCs with HFB assisted perovskite films. Meanwhile HFB modified unencapsulated device maintains 88% of its initial PCE after aging for over 1440 h at 25 °C and 30% relative humidity in ambient conditions.

KW - Crystallization management strategy

KW - Hexafluorobenzene

KW - PbI layer morphology

KW - perovskite solar cells

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U2 - 10.1016/j.jssc.2023.124195

DO - 10.1016/j.jssc.2023.124195

M3 - Journal article

AN - SCOPUS:85164212681

SN - 0022-4596

VL - 326

JO - Journal of Solid State Chemistry

JF - Journal of Solid State Chemistry

M1 - 124195

ER -

Two-step perovskite crystallization assisted with F-containing additives enables over 23% efficiency in perovskite solar cells

Abstract

Keywords

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