论文信息 - 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

Abstract 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 (ND = 2.1 × 1018cm−3) and the flatband potential (Ufb = − 530 mV).

Hans-Joachim Egelhaaf | Dieter Oelkrug | H. Egelhaaf | D. Oelkrug

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