首页|Luminescence regulation of Sb3+ in 0D hybrid metal halides by hydrogen bond network for optical anti-counterfeiting
Luminescence regulation of Sb3+ in 0D hybrid metal halides by hydrogen bond network for optical anti-counterfeiting
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The Sb3+ doping strategy has been proven to be an effective way to regulate the band gap and improve the photophysic-al properties of organic-inorganic hybrid metal halides(OIHMHs).However,the emission of Sb3+ ions in OIHMHs is primarily confined to the low energy region,resulting in yellow or red emissions.To date,there are few reports about green emission of Sb3+-doped OIHMHs.Here,we present a novel approach for regulating the luminescence of Sb3+ ions in 0D C10H22N6InCl7·H2O via hydrogen bond network,in which water molecules act as agents for hydrogen bonding.Sb3+-doped C10H22N6InCl7·H2O shows a broadband green emission peaking at 540 nm and a high photoluminescence quantum yield(PLQY)of 80%.It is found that the intense green emission stems from the radiative recombination of the self-trapped excitons(STEs).Upon removal of water molecules with heat,C10H22N6In1-xSbxCl7 generates yellow emis-sion,attributed to the breaking of the hydrogen bond network and large structural distortions of excited state.Once water molecules are adsorbed by C10H22N6In1-xSbxCl7,it can subsequently emit green light.This water-induced reversible emission switching is successfully used for optical security and information encryption.Our findings expand the under-standing of how the local coordination structure influences the photophysical mechanism in Sb3+-doped metal halides and provide a novel method to control the STEs emission.
Key Laboratory of Optoelectronic Technology&Systems(Ministry of Education),Chongqing University,Chongqing 400044,China
Department of Physics&Astronomy,College of Sciences,King Saud University,P.O.Box 2455,Riyadh 11451,Saudi Arabia
Department of Oil,Army Logistics Academy of PLA,Chongqing 401311,China
Department of Chemistry and Chemical Engineering,Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province,Shantou University,Shantou 515063,China
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国家自然科学基金Graduate research innovation projectSchool of Opto-electronic Engineering,Chongqing University中央高校基本科研业务费专项Deputyship for Research and In-novation,Ministry of Education in Saudi Arabia for funding this research work through the pro
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