Luminescence and nonradiative deactivation of excited states involving oxygen defect centers in polycrystalline ZnO
Luminescence and nonradiative deactivation of excited states involving oxygen defect centers in polycrystalline ZnO
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DOI：
10.1016/0022-0248(95)00634-6
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发表时间：
1996-04-01
影响因子：
1.8
通讯作者：
Oelkrug, D
中科院分区：
文献类型：
--
作者：
Egelhaaf, HJ;Oelkrug, D
通过漫反射、稳态和时间分辨光致发光以及光电导研究了多晶ZnO的绿色发光，并将其归属于施主-受主型跃迁。由于表面态的有效淬灭，它在激发成氧缺陷态时被最有效地激发。这种“死层效应”用于确定施主密度（N-D = 2.1 × 10（18）cm（-3））和平带电位（U-fb =-530 mV）。
The green luminescence of polycrystalline ZnO is investigated by diffuse reflection, steady state and time-resolved photoluminescence as well as photoconductivity and is assigned to a donor-acceptor-type transition. Due to efficient quenching by surface states it is most effectively excited upon excitation into oxygen defect states. This ''dead-layer effect'' is used to determine the donor density (N-D = 2.1 x 10(18) cm(-3)) and the flatband potential (U-fb = - 530 mV).