Highly Stable Orange-Red Long-Persistent Luminescent CsCdCl3: Mn~(2+) Perovskite Crystal

摘要

Halide perovskite has been widely studied as a new generation of photoelectronic materials. However, their thermal and humidity-induced emission quenching have greatly limited their utility and reliability. Here, we report a hexagonal Mn~(2+)-doped CsCdCl3 perovskite crystal that possesses stable photoluminescence (PL) at both high temperature and humidity. The room temperature long-persistent luminescence (LPL) of the single crystals lasts up to 1480 s and can be adjusted by changing the concentration of Mn~(2+) ion doping. The characteristic emission of d-d transition of Mn~(2+) is realized, and the photoluminescence quantum yield (PLQY) is up to 91.4 , it can maintain more than 90 of the initial PL spectral integral area at 150 °C (423 K). High humid stability PL can be achieved more than 75 of the initial PL intensity after 55 days of immersion in water. These excellent properties show the application prospect of the LPL material in lighting indication and anti-counterfeiting.