首页|Efficient tunable visible and near-infrared emission in Sb3+/Sm3+-codoped Cs2NaLuCl6 for near-infrared light-emitting diode,triple-mode fluorescence anti-counterfeiting and information encryption
Efficient tunable visible and near-infrared emission in Sb3+/Sm3+-codoped Cs2NaLuCl6 for near-infrared light-emitting diode,triple-mode fluorescence anti-counterfeiting and information encryption
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Rare earth ions(RE3+)-doped double perovskites have attracted tremendous attention for its fascinat-ing optical properties.Nevertheless,RE3+generally exhibits poor photoluminescence quantum yield(PLQY)for their parity-forbidden 4f-4f transition and the low doping concentration.Herein,we reported Sb3+/Sm3+-codoped rare earth-based double perovskite Cs2NaLuCl6 that enables efficient visible and near-infrared(NIR)emission,which stems from self-trapped exciton(STE)and Sm3+,respectively.Benefit from up to 72.89％energy transfer efficiency from STE to Sm3+and high doping concentrations due to similar ionic activity between Sm3+and Lu3+,thus eruptive PLQY of 74.58％in the visible light region and 23.12％in the NIR light region can be obtained.Moreover,Sb3+/Sm3+-codoped Cs2NaLuCl6 exhibits tunable emis-sion characteristic in the visible light region under different excitation wavelengths,which can change from blue emission(254 nm excitation)to white emission(365 nm excitation).More particularly,only the NIR emission can be captured by the NIR camera when a 700 nm cutoff filter is added.The excel-lent stability and unique optical properties of Sb3+/Sm3+-codoped Cs2NaLuCl6 enable us to demonstrate its applications in NIR light-emitting diode,triple-mode fluorescence anti-counterfeiting and information encryption.These findings provide new inspiration for the application of rare earth-based double per-ovskite in optoelectronic devices.
Hui Peng、Xiao Wang、Weiguo Huang、Shuiyue Yu、Linghang Kong、Qilin Wei、Jialong Zhao、Bingsuo Zou
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State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures,MOE Key Laboratory of New Processing Technology for Nonferrous Metals and Materials,and School of Resources,Environment and Materials,Guangxi University,Nanning 530004,China
School of Chemistry and Chemical Engineering,Shandong University,Ji'nan 250100,China
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