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Light-induced phase transition and photochromism in all-inorganic two-dimensional Cs2PbI2Cl2 perovskite
Xiaojun Li1; Mingming Chen2; Shiliang Mei1; Bingzhe Wang1; Kaiyang Wang1; Guichuan Xing1; Zikang Tang1
2020-04-27
Source PublicationScience China Materials
ISSN2095-8226
Volume63Issue:8Pages:1510-1517
Abstract

Organic-inorganic hybrid two-dimensional (2D) ruddlesden-popper (RP) perovskites with fantastic optoelectronic properties and good stability have attracted tremendous attention for the potential applications in photovoltaics and electroluminescence. Recently, a new all-inorganic Cs2PbI2Cl2 2D perovskite has been proposed with excellent excitonic absorption and improved ambient and thermal stability. Herein, an interesting light-induced phase transition and photochromism in the Cs2PbI2Cl2 were reported. Under low fluence light pumping, the room temperature photoluminescence (PL) of Cs2PbI2Cl2 is dominated by a weak violet excitonic emission peaked at 412 nm. Surprisingly, the emission color gradually changes from violet to bright red while increasing the laser pumping fluence. This photochromic effect is determined to be caused by forming CsPbI3 phase within the Cs2PbI2Cl2 crystals, which is efficiently driven by thermal energy. Due to protection by the Cs2PbI2Cl2 matrix, the embedded CsPbI3 nanocrystals show improved stability than standard pure CsPbI3. Therefore, the Cs2PbI2Cl2 perovskite with photochromic feature may find applications in optical encryption, as preliminarily shown in this work.

KeywordCs2pbi2cl2 Light-induced Phase Transition Photochromism Optical Encryption
DOI10.1007/s40843-020-1290-y
URLView the original
Indexed BySCIE
Language英語English
WOS Research AreaMaterials Science
WOS SubjectMaterials Science, Multidisciplinary
WOS IDWOS:000529455600001
PublisherSCIENCE PRESS, 16 DONGHUANGCHENGGEN NORTH ST, BEIJING 100717, PEOPLES R CHINA
Scopus ID2-s2.0-85083974376
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Cited Times [WOS]:3   [WOS Record]     [Related Records in WOS]
Document TypeJournal article
CollectionUniversity of Macau
Corresponding AuthorGuichuan Xing; Zikang Tang
Affiliation1.Institute of Applied Physics and Materials Engineering,University of Macau,Avenida da Universidade, Taipa,999078,Macao
2.Department of Physics,Jiangsu University,Zhenjiang,212013,China
First Author AffilicationINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Corresponding Author AffilicationINSTITUTE OF APPLIED PHYSICS AND MATERIALS ENGINEERING
Recommended Citation
GB/T 7714
Xiaojun Li,Mingming Chen,Shiliang Mei,et al. Light-induced phase transition and photochromism in all-inorganic two-dimensional Cs2PbI2Cl2 perovskite[J]. Science China Materials,2020,63(8):1510-1517.
APA Xiaojun Li,Mingming Chen,Shiliang Mei,Bingzhe Wang,Kaiyang Wang,Guichuan Xing,&Zikang Tang.(2020).Light-induced phase transition and photochromism in all-inorganic two-dimensional Cs2PbI2Cl2 perovskite.Science China Materials,63(8),1510-1517.
MLA Xiaojun Li,et al."Light-induced phase transition and photochromism in all-inorganic two-dimensional Cs2PbI2Cl2 perovskite".Science China Materials 63.8(2020):1510-1517.
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