Thermoluminescence of Al_2O_3 crystals grown by temperature gradient techniques

作     者：CHEN Wei SONG PingXin DONG YongJun ZHANG YingJiu HUA Wei 

作者机构：College of Physical Science and Engineering Zhengzhou University State Key Laboratory of High Field Laser Physics Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences 

出 版 物：《Chinese Science Bulletin》 (中国科学通报)

年 卷 期：2013年第58卷第16期

页      面：1964-1968页

核心收录：

学科分类：080903[工学-微电子学与固体电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 

主　　题：梯度技术 晶体生长 生长温度 热释光 色心浓度 吸收光谱 拟合曲线 频率因子 

摘      要：Color center concentrations of the Al2O3 crystal grown by temperature gradient techniques were calculated from Gaussian fits to absorption spectra. The concentrations for F- and F + -centers at 204, 232, and 255 nm were determined to be 1.361×10 17 , 0.098×10 17 , and 0.325×10 17cm-3 , respectively. Studies have shown that the thermoluminescence (TL) glow curve exhibits a prominent 450 K peak that matches well the first-order fitting curve. The thermal activation energy E and frequency factor s of the trap were determined to be 0.94456±0.00545 eV and 5.8703×10 11 s-1 . With this theoretical analysis, a simple one-trap/one-center TL model is presented to provide a theoretical explanation of the TL process.