Sun Haibo, Yang Xinyu, Li Peilin, Bai Yunfei, Meng Qichao, Zhao Hongyuan, Wang Qiujie, Wen Ziying, Huang Li, Huang Dan, Yu William W, Chen Haibin, Liu Feng
Province-Ministry Co-construction Collaborative Innovation Center of Hebei Photovoltaic Technology, National-Local Joint Engineering Laboratory of New Energy Photoelectric Devices, Hebei Key Laboratory of Photo-Electricity Information and Materials, College of Physics Science and Technology, Hebei University, Baoding 071002, People's Republic of China.
Institute of Frontier Chemistry, School of Chemistry and Chemical Engineering, Shandong University, Qingdao 266237, People's Republic of China.
Nano Lett. 2024 Aug 21;24(33):10355-10361. doi: 10.1021/acs.nanolett.4c03019. Epub 2024 Aug 9.
Combining rare earth elements with the halide perovskite structure offers valuable insights into designing nonlead (Pb) luminescent materials. However, most of these compositions tend to form zero-dimensional (0D) networks of metal-halide polyhedra, with higher-dimensional (1D, 2D, and 3D) structures receiving relatively less exploration. Herein, we present synthesis and optical properties of CsCeCl·3HO, characterized by its unique 1D crystal structure. The conduction band minimum of CsCeCl·3HO becomes less localized as a result of the increased structural dimension, making it possible for the materials to achieve an efficient electrical injection. For both CsCeCl·3HO single crystals and nanocrystals, we also observed remarkable luminescence with near-unity photoluminescence quantum yield and exceptional phase stability. CsCeCl·3HO single crystals demonstrate an X-ray scintillation light yield of 31900 photons/MeV, higher than that of commercial LuAG:Ce (22000 photons/MeV); electrically driven light-emitting diodes fabricated with CsCeCl·3HO nanocrystals yield the characteristic emission of Ce, indicating their potential use in next-generation violet-light-emitting devices.
将稀土元素与卤化物钙钛矿结构相结合，为设计无铅（Pb）发光材料提供了有价值的见解。然而，这些组合物大多倾向于形成金属卤化物多面体的零维（0D）网络，而对更高维度（1D、2D和3D）结构的探索相对较少。在此，我们展示了CsCeCl·3H₂O的合成及其光学性质，其特征在于其独特的一维晶体结构。由于结构维度的增加，CsCeCl·3H₂O的导带最小值变得不那么局域化，使得材料有可能实现高效的电注入。对于CsCeCl·3H₂O单晶和纳米晶体，我们还观察到具有近乎单位光致发光量子产率和出色相稳定性的显著发光。CsCeCl·3H₂O单晶的X射线闪烁光产额为31900光子/MeV，高于商用LuAG:Ce（22000光子/MeV）；用CsCeCl·3H₂O纳米晶体制备的电驱动发光二极管产生Ce的特征发射，表明它们在下一代紫光发光器件中的潜在用途。
