OPTICAL-PROPERTIES OF LATTICE-DEFECTS IN ALPHA-AL2O3
OPTICAL-PROPERTIES OF LATTICE-DEFECTS IN ALPHA-AL2O3
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DOI：
10.1016/0168-583x(94)96227-8
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发表时间：
1994-06-01
影响因子：
1.3
通讯作者：
CHEN, Y
中科院分区：
文献类型：
--
作者：
EVANS, BD;POGATSHNIK, GJ;CHEN, Y
综述了单晶α-Al2O3晶格空位缺陷的实验光学性质。特定的紫外线吸收和发光带与 F 型中心相关。长时间暴露于超热中子源后，光漂白和各向异性特性使得一些可见光和近红外波段与 F2 型中心相关联。光电导性、光稳定性和电荷态考虑因素提供了相对于导带边缘的缺陷能级的初步放置。
Experimental optical properties of lattice vacancy defects in single crystal alpha-Al2O3 are reviewed. Specific ultraviolet absorption and luminescence bands are associated with F-type centers. Following extended exposures to epithermal neutron sources, photobleaching and anisotropic properties allowed the association of several of.the visible and near infrared bands with F2-type centers. Photoconductivity, photostability and charge state considerations provided tentative placement of defect energy levels with respect to the conduction band edge.