Dhale Shruti P, Ugemuge Nilesh S, Singh Vartika S, Moharil Sanjiv V
Department of Physics, Anand Niketan College, Anandwan, Warora 442907, India.
Advanced Carbon Products and Metrology, CSIR-NPL, New Delhi 110012, India.
Spectrochim Acta A Mol Biomol Spectrosc. 2025 Jan 15;325:125050. doi: 10.1016/j.saa.2024.125050. Epub 2024 Aug 30.
Preparation of LiZrF:Ce and LiZrF:Ce,Gd phosphors is described. Data on luminescence characteristics are presented. Hydrothermal route was employed for the synthesis. LiZrF crystallizes in orthorhombic system with Pnma space group. Li atoms are distributed over two sites, both having same coordination of six. Zr is also similarly distributed over two 8 coordinated sites. LiZrF:Ce emits a broad band UVB light, while the emission of LiZrF:Ce,Gd is in form of a narrow line around 311 nm attributed to P → S. Both phosphors exhibited a broad excitation spectrum with a peak at 253 nm. The excitation and emission properties are thus adequate enough to obtain UVB light sources using a conventional high pressure mercury vapour lamp or an ultraviolet LED.
描述了LiZrF:Ce和LiZrF:Ce,Gd荧光粉的制备方法。给出了发光特性数据。采用水热法进行合成。LiZrF以正交晶系结晶，空间群为Pnma。Li原子分布在两个位置，两者的配位均为六配位。Zr也类似地分布在两个八配位位置。LiZrF:Ce发出宽带中波紫外线光，而LiZrF:Ce,Gd的发射为311nm附近的窄线形式，归因于P→S。两种荧光粉均表现出在253nm处有峰值的宽激发光谱。因此，利用传统的高压汞蒸气灯或紫外发光二极管，其激发和发射特性足以获得中波紫外线光源。
