Year
Month
(Peer-Reviewed) Luminescence regulation of Sb3+ in 0D hybrid metal halides by hydrogen bond network for optical anti-counterfeiting
Dehai Liang 梁德海 ¹, Saif M. H. Qaid ², Xin Yang 杨鑫 ⁴, Shuangyi Zhao 赵双易 ¹, Binbin Luo 罗彬彬 ³, Wensi Cai 蔡文思 ¹, Qingkai Qian 钱庆凯 ¹, Zhigang Zang 臧志刚 ¹
¹ Key Laboratory of Optoelectronic Technology & Systems (Ministry of Education), Chongqing University, Chongqing 400044, China
中国 重庆 重庆大学光电技术及系统教育部重点实验室
² Department of Physics & Astronomy, College of Sciences, King Saud University, P.O. Box 2455, Riyadh 11451, Saudi Arabia
³ Department of Chemistry and Chemical Engineering, Key Laboratory for Preparation and Application of Ordered Structural Materials of Guangdong Province, Shantou University, Shantou 515063, China
中国 汕头 汕头大学化学化工学院 广东省有序结构材料的制备与应用重点实验室
⁴ Department of Oil, Army Logistics Academy of PLA, Chongqing 401311, China
中国 重庆 中国人民解放军陆军勤务学院 石油系
Opto-Electronic Advances, 2024-03-20
Abstract

The Sb³⁺ doping strategy has been proven to be an effective way to regulate the band gap and improve the photophysical 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₋ₓ SbₓCl₇ generates yellow emission, attributed to the breaking of the hydrogen bond network and large structural distortions of excited state.

Once water molecules are adsorbed by C₁₀H₂₂N₆In₁₋ₓ SbₓCl₇, 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 understanding 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.
Luminescence regulation of Sb3+ in 0D hybrid metal halides by hydrogen bond network for optical anti-counterfeiting_1
Luminescence regulation of Sb3+ in 0D hybrid metal halides by hydrogen bond network for optical anti-counterfeiting_2
Luminescence regulation of Sb3+ in 0D hybrid metal halides by hydrogen bond network for optical anti-counterfeiting_3
Luminescence regulation of Sb3+ in 0D hybrid metal halides by hydrogen bond network for optical anti-counterfeiting_4
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