Lead-Free Double Perovskite Cs2SnX6: Facile Solution Synthesis and Excellent Stability

Xiao Han; Jia Liang; Ji-Hui Yang; Khushboo Soni; Qiyi Fang; Weipeng Wang; Jing Zhang; Shuai Jia; Angel A. Martí; Yan Zhao; Jun Lou

doi:10.1002/smll.201901650

Lead-Free Double Perovskite Cs₂SnX₆: Facile Solution Synthesis and Excellent Stability

Xiao Han, Jia Liang^*, Ji-Hui Yang, Khushboo Soni, Qiyi Fang, Weipeng Wang, Jing Zhang, Shuai Jia, Angel A. Martí, Yan Zhao, Jun Lou^*

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

100 Citations (Scopus)

Abstract

Long-term instability and possible lead contamination are the two main issues limiting the widespread application of organic–inorganic lead halide perovskites. Here a facile and efficient solution-phase method is demonstrated to synthesize lead-free Cs₂SnX₆ (X = Br, I) with a well-defined crystal structure, long-term stability, and high yield. Based on the systematic experimental data and first-principle simulation results, Cs₂SnX₆ displays excellent stability against moisture, light, and high temperature, which can be ascribed to the unique vacancy-ordered defect-variant structure, stable chemical compositions with Sn⁴⁺, as well as the lower formation enthalpy for Cs₂SnX₆. Additionally, photodetectors based on Cs₂SnI₆ are also fabricated, which show excellent performance and stability. This study provides very useful insights into the development of lead-free double perovskites with high stability.. © 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

Original language	English
Article number	1901650
Number of pages	7
Journal	Small
Volume	15
Issue number	39
Online published	2 Aug 2019
DOIs	https://doi.org/10.1002/smll.201901650
Publication status	Published - 25 Sept 2019
Externally published	Yes

Funding

This work was funded by the Fundamental Research Funds for the Central Universities (3102019QD0418), Fudan Start-up funding (JIH1512034), Shanghai Sailing Program (19YF1403100), the Peter M. and Ruth L. Nicholas Postdoctoral Fellowship in Nanotechnology (H21065) and the Welch Foundation grant C-1716. X.H. thanks the China Scholarship Council for partial support. K.S. thanks the DSTINSPIRE, Govt. of India (201500026916) and Nehru-Fulbright Research Internship Fellowship (2330/DR/2018-2019). Note: Affiliation 7 and the Acknowledgements were updated on September 25, 2019 after initial online publication.

Research Keywords

Cs2SnI6
double perovskites
lead-free
photodetectors
solution synthesis
stability

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@article{767e93f0eb4f45eba7f6ed92f3edd5ef,

title = "Lead-Free Double Perovskite Cs2SnX6: Facile Solution Synthesis and Excellent Stability",

abstract = "Long-term instability and possible lead contamination are the two main issues limiting the widespread application of organic–inorganic lead halide perovskites. Here a facile and efficient solution-phase method is demonstrated to synthesize lead-free Cs2SnX6 (X = Br, I) with a well-defined crystal structure, long-term stability, and high yield. Based on the systematic experimental data and first-principle simulation results, Cs2SnX6 displays excellent stability against moisture, light, and high temperature, which can be ascribed to the unique vacancy-ordered defect-variant structure, stable chemical compositions with Sn4+, as well as the lower formation enthalpy for Cs2SnX6. Additionally, photodetectors based on Cs2SnI6 are also fabricated, which show excellent performance and stability. This study provides very useful insights into the development of lead-free double perovskites with high stability.. {\textcopyright} 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim",

keywords = "Cs2SnI6, double perovskites, lead-free, photodetectors, solution synthesis, stability",

author = "Xiao Han and Jia Liang and Ji-Hui Yang and Khushboo Soni and Qiyi Fang and Weipeng Wang and Jing Zhang and Shuai Jia and Mart{\'i}, {Angel A.} and Yan Zhao and Jun Lou",

year = "2019",

month = sep,

day = "25",

doi = "10.1002/smll.201901650",

language = "English",

volume = "15",

journal = "Small",

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TY - JOUR

T1 - Lead-Free Double Perovskite Cs2SnX6

T2 - Facile Solution Synthesis and Excellent Stability

AU - Han, Xiao

AU - Liang, Jia

AU - Yang, Ji-Hui

AU - Soni, Khushboo

AU - Fang, Qiyi

AU - Wang, Weipeng

AU - Zhang, Jing

AU - Jia, Shuai

AU - Martí, Angel A.

AU - Zhao, Yan

AU - Lou, Jun

PY - 2019/9/25

Y1 - 2019/9/25

N2 - Long-term instability and possible lead contamination are the two main issues limiting the widespread application of organic–inorganic lead halide perovskites. Here a facile and efficient solution-phase method is demonstrated to synthesize lead-free Cs2SnX6 (X = Br, I) with a well-defined crystal structure, long-term stability, and high yield. Based on the systematic experimental data and first-principle simulation results, Cs2SnX6 displays excellent stability against moisture, light, and high temperature, which can be ascribed to the unique vacancy-ordered defect-variant structure, stable chemical compositions with Sn4+, as well as the lower formation enthalpy for Cs2SnX6. Additionally, photodetectors based on Cs2SnI6 are also fabricated, which show excellent performance and stability. This study provides very useful insights into the development of lead-free double perovskites with high stability.. © 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

AB - Long-term instability and possible lead contamination are the two main issues limiting the widespread application of organic–inorganic lead halide perovskites. Here a facile and efficient solution-phase method is demonstrated to synthesize lead-free Cs2SnX6 (X = Br, I) with a well-defined crystal structure, long-term stability, and high yield. Based on the systematic experimental data and first-principle simulation results, Cs2SnX6 displays excellent stability against moisture, light, and high temperature, which can be ascribed to the unique vacancy-ordered defect-variant structure, stable chemical compositions with Sn4+, as well as the lower formation enthalpy for Cs2SnX6. Additionally, photodetectors based on Cs2SnI6 are also fabricated, which show excellent performance and stability. This study provides very useful insights into the development of lead-free double perovskites with high stability.. © 2019 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

KW - Cs2SnI6

KW - double perovskites

KW - lead-free

KW - photodetectors

KW - solution synthesis

KW - stability

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DO - 10.1002/smll.201901650

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