首页|Sb3+and Sm3+co-doped lead-free Cs2NaInCl6 double perovskite nanocrystals for single-component cold white emitter
Sb3+and Sm3+co-doped lead-free Cs2NaInCl6 double perovskite nanocrystals for single-component cold white emitter
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Metal halide perovskites exhibit promising prospect in light-emitting diodes,solar cells,photodetectors and bioimaging.However,the workhorse of metal halide perovskites relies on toxicity lead element,which severely damages human body and environment.Among lead-free perovskites,Cs2NaInCl6 double perovskite is one of the most promising candidates because of its great stability and easy synthesis,but suffers inadequate optical performance.Here,we doped Sb3+and Sm3+into Cs2NaInCl6 nanocrystals by a hot injection method.Cs2NaInCl6∶Sb3+exhibits blue emission at 447 nm.Cs2NaInCl6∶Sm3+,Sb3+nano-crystals simultaneously generate the blue emission of Sb3+and the multiple emissions of Sm3+at 565,602,650 and 710 nm.With the increase of Sm3+feed ratio,the emission color of Cs2NaInCl6∶Sm3+,Sb3+gradually moves to cold white region at(0.27,0.28)in CIE chromaticity diagram and correlated color temperature of 11840 K.This work shows the potential application of Cs2NaInCl6∶Sm3+,Sb3+nanocrystals as a single-component cold white emitter.
Key Laboratory for Special Functional Materials of Ministry of Education,National & Local Joint Engineering Research Centre for High-Efficiency Display and Lighting Technology,School of Materials and Engineering,Collaborative Innovation Centre of Nano Functional Materials and Applications,Henan University,Kaifeng,475000,China
School of Chemistry and Chemical Engineering,Shandong University,Jinan,250100,China
National Natural Science Foundation of ChinaChina Postdoctoral Science FoundationAnalytical and Testing Center,School of Life Sciences,Henan University
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