He Shuangshuang, Qiang Qinping, Lang Tianchun, Cai Mingsheng, Han Tao, You Houjiang, Peng Lingling, Cao Shixiu, Liu Bitao, Jing Xiaolong, Jia Bi
Chongqing Key Laboratory of Materials Surface & Interface Science, Research Institute for New Materials Technology, Chongqing University of Arts and Sciences, Chongqing, 402160, China.
School of Material Science and Engineering, Chongqing University of Technology, Chongqing, 400054, China.
Angew Chem Int Ed Engl. 2022 Nov 25;61(48):e202208937. doi: 10.1002/anie.202208937. Epub 2022 Oct 25.
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 -doped CsCdCl 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 ion doping. The characteristic emission of d-d transition of Mn 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.
卤化物钙钛矿作为新一代光电子材料已得到广泛研究。然而，它们因热和湿度引起的发射猝灭极大地限制了其效用和可靠性。在此，我们报道了一种六方晶系的掺锰CsCdCl钙钛矿晶体，其在高温和湿度条件下均具有稳定的光致发光（PL）特性。单晶的室温长余辉发光（LPL）持续时间长达1480 s，并且可以通过改变锰离子掺杂浓度进行调节。实现了锰的d-d跃迁特征发射，光致发光量子产率（PLQY）高达91.4%，在150 °C（423 K）时能保持初始PL光谱积分面积的90%以上。在水中浸泡55天后，高湿稳定性PL可达到初始PL强度的75%以上。这些优异性能表明了LPL材料在照明指示和防伪方面的应用前景。
