光致发光
铕
发光
闪烁体
镥
分析化学(期刊)
材料科学
荧光粉
Crystal(编程语言)
发射光谱
单晶
光致发光激发
激发态
兴奋剂
谱线
光学
化学
结晶学
氧化物
光电子学
物理
原子物理学
钇
计算机科学
程序设计语言
冶金
探测器
色谱法
天文
作者
Jiaqian Zheng,Changjiang Liu,Hua Yu,Lu Chen,Mei Yang,Hengyu Zhao,Baoqi Lu,F. Yang,Feng He
标识
DOI:10.1002/crat.202100120
摘要
Abstract Europium‐doped lutetium oxide (Lu 2 O 3 :Eu) single crystal is grown by vertical Bridgman method for the first time. Correlated measurements of X‐ray diffraction, X‐ray fluorescence spectra, optical transmittance, photoluminescence excitation, photoluminescence (PL), PL decay, and X‐ray excited luminescence (XEL) spectra are performed. The transmittance of about 80% above 300 nm indicates that the crystal is of good optical quality. By measuring actual Eu 3+ concentration, the effective segregation coefficient of Eu 3+ in the Lu 2 O 3: Eu crystal is calculated to be 0.75. In the PL spectrum, the dominant emission peaks at 612 and 630 nm originate from the 5 D 0 → 7 F 2 transitions of Eu 3+ in C 2 site. It is worth mentioning that several emission peaks between 575 and 605 nm mainly ascribe to the transitions of different 5 D 0 levels to the split 7 F 1 levels of Eu(C 2 ) or Eu(C 3i ). PL decay spectra indicate the decay time of 612 nm emission can be determined about 1.0 ms. The decay curve of 582.6 nm emission can be fitted into triple components, and the 5.3 and 1.4 ms components are attributed to Eu 3+ (C 3i ) and Eu 3+ (C 2 ), respectively. The XEL strongest emission of Lu 2 O 3 :Eu sample is around 612 nm with a bright red luminescence that matches silicon photodetectors sensitivity.
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