Highly efficient and blue-light-excitable zero-dimensional hybrid copper iodides toward solid-state lighting and x-ray imaging applications

作者：Linyuan Lian, Daming Xiong, Jibin Zhang, Mochen Jia, Ying Liu, Zhuangzhuang Ma, Xu Chen, Yanbing Han, Yongtao Tian, Xinjian Li, Jianbing Zhang, S. Qian, Chongxin Shan, Zhifeng Shi · 发表于：Applied Physics Reviews · 年份：2025 · DOI：10.1063/5.0258407 · 被引用次数：23 · 研究领域：Perovskite Materials and Applications、Luminescence Properties of Advanced Materials、Luminescence and Fluorescent Materials

Organic–inorganic hybrid metal halides have gained significant attention as downconversion phosphors in solid-state lighting and x-ray imaging due to their unique optical properties. However, achieving efficient luminescence under blue light excitation remains a significant challenge. Herein, we present a novel zero-dimensional hybrid copper iodide [Li(H2O)(Benzo-15-crown-5)2]2Cu4I6 (abbreviated as [LB]2Cu4I6), as a highly efficient and blue-light-excitable emitter with potential in lighting and x-ray imaging applications. This compound exhibits an ultrabroad excitation band spanning from 250 to 500 nm, upon blue light, ultraviolet, or x-ray excitation, delivers strong broadband yellow emission centered at 541 nm with a high photoluminescence quantum yield (PLQY) of 92.1%. Benefiting from their strong photoexcitation under blue light, high PLQY, and good environmental stability, a high-performance white light-emitting diode was developed, achieving a commercial-level luminous efficiency of 101.6 lm W−1, a high color rendering index of 87, and a record half-lifetime of 2352 h. Additionally, [LB]2Cu4I6 demonstrates outstanding x-ray scintillation properties with a high light yield of 83 904 photons MeV−1, a low detection limit of 72.3 nGy s−1, and a competitive spatial resolution of 10.3 lp mm−1 for x-ray imaging. This work provides a new avenue for exploring highly efficient and blue-light-excitable luminescent metal halides toward multifunctional applications.