Suo Hao, Wang Nan, Zhang Yu, Zhang Xin, Xiang Jinmeng, Wang Xiaojia, Xing Guansheng, Guo Dongxu, Chang Jiwen, Wang Yu, Li Panlai, Wang Zhijun, Zhang Yuhai, Chen Bing, Li Shuzhou, Guo Chongfeng, Wang Feng
Hebei Key Laboratory of Optic-electronic Information and Materials, College of Physics Science & Technology, Hebei University, Baoding, 071002, China.
Department of Materials Science and Engineering, City University of Hong Kong, Kowloon, 999077, Hong Kong SAR, China.
Light Sci Appl. 2025 Jan 2;14(1):21. doi: 10.1038/s41377-024-01689-7.
Low-dimensional lead-free metal halide perovskites are highly attractive for cutting-edge optoelectronic applications. Herein, we report a class of scandium-based double perovskite crystals comprising antimony dopants that can generate multiexcitonic emissions in the ultraviolet, blue, and yellow spectral regions. Owing to the zero-dimensional nature of the crystal lattice that minimizes energy crosstalk, different excitonic states in the crystals can be selectively excited by ultraviolet light, X-ray irradiation, and mechanical action, enabling dynamic control of steady/transient-state spectral features by modulating the excitation modes. Remarkably, the transparent crystal exhibits highly efficient white photoluminescence (quantum yield >97%), X-ray excited blue emission with long afterglow (duration >9 h), and high-brightness self-reproducible violet-blue mechanoluminescence. These findings reveal the exceptional capability of low-dimensional perovskite crystals for integrating various excitonic luminescence, offering exciting opportunities for multi-level data encryption and all-in-one authentication technologies.
低维无铅金属卤化物钙钛矿在前沿光电子应用中极具吸引力。在此，我们报道了一类包含锑掺杂剂的钪基双钙钛矿晶体，其可在紫外、蓝光和黄光光谱区域产生多激子发射。由于晶格的零维性质使能量串扰最小化，晶体中的不同激子态可通过紫外光、X射线辐照和机械作用被选择性激发，从而通过调制激发模式实现对稳态/瞬态光谱特征的动态控制。值得注意的是，这种透明晶体展现出高效的白色光致发光（量子产率>97%）、具有长余辉（持续时间>9小时）的X射线激发蓝光发射以及高亮度可自再现的紫蓝色机械发光。这些发现揭示了低维钙钛矿晶体在整合各种激子发光方面的卓越能力，为多级数据加密和一体化认证技术提供了令人兴奋的机遇。
