Highly Stable Orange-Red Long-Persistent Luminescent CsCdCl3:Mn2+ Perovskite Crystal

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 Mn2+-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 Mn2+ ion doping. The characteristic emission of d-d transition of Mn2+ 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 degrees 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.

Automated summary

In this study, a hexagonal Mn2+-doped CsCdCl3 perovskite crystal with stable photoluminescence (PL) at both high temperature and humidity was reported. The room temperature long-persistent luminescence (LPL) of the single crystals can last up to 1480 s and can be adjusted by changing the concentration of Mn2+ ion doping. The photoluminescence quantum yield (PLQY) is up to 91.4%, and it can maintain more than 90% of the initial PL spectral integral area at 150 degrees C (423 K). High humidity stability PL can be achieved with more than 75% of the initial PL intensity after 55 days of immersion in water. These excellent properties indicate the potential application of the LPL material in lighting indication and anti-counterfeiting.