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Scientists Synthesize All-inorganic Lead-free 0D Perovskite Crystals with Excitation-dependent Emission
  English.dicp.cas.cn    Posted:2022-02-24    From:Group 1101

Materials with excitation-dependent emission are promising in applictions in encrypted information storage, multicolor display and anti-counterfeiting fields.

Cs2ScCl5·H2O single crystals can show tunable emission colors and its PLQY can be largely enhanced by Sb doping (Image by ZHANG Ruiling)

Recently, a research group led by Prof. HAN Keli from the Dalian Institute of Chemical Physics (DICP) of the Chinese Academy of Sciences (CAS) synthesized an all-inorganic 0D perovskite Cs2ScCl5·H2O with excitation-dependent emission behavior.

This study was published in Laser & Photonics Reviews on February 5.

The emission color of Cs2ScCl5·H2O could be simply tuned from blue-green to white to yellow by changing excitation wavelengths.

The origin of the tunable emission was attributed to the contribution of two different self-trapped exciton (STE) states. 

Moreover, the researchers doped Sb3+ ions into Cs2ScCl5·H2O single crystals, leading to enhanced photoluminescence with about 100% photoluminescence quantum yield.

"This work provides new insights into the excitation-dependent emission in all-inorganic semiconductors, and presents a strategy to develop environmentally-friendly high-performance emitters," said by Prof. HAN.

This study was supported by the National Natural Science Foundation of China. (Text by ZHANG Ruiling)

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