热释光
光致发光
发光
材料科学
单斜晶系
亚稳态
纳米晶
动能
持续发光
激发
辐照
分析化学(期刊)
原子物理学
分子物理学
光电子学
纳米技术
结晶学
化学
物理
晶体结构
量子力学
色谱法
有机化学
核物理学
作者
Rajesh Kumar,Ankush Vij,Mukhtiyar Singh
出处
期刊:Optik
[Elsevier]
日期:2021-12-01
卷期号:248: 168121-168121
被引量:7
标识
DOI:10.1016/j.ijleo.2021.168121
摘要
We report here the photoluminescence (PL) and thermoluminescence (TL) of single phase monoclinic (m)-HfO2 nanocrystals. The m-HfO2 shows broad PL in warm white region upon 325 nm excitation, which may be assigned to 4-fold (O4) vacancies as predicted by first principles calculations. TL glow curve of gamma irradiated m-HfO2 comprises of a main peak around 400 K along with a low intensity peak at 480 K, and detailed kinetic analysis confirms the presence of two kinds of metastable traps (0.86 and 1.60 eV). The carrier concentration in shallow traps (0.86 eV) were found relatively much higher than deep traps (1.60 eV), which augurs well for stronger TL signal at 400 K.
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