Absolute external luminescence quantum efficiency of zinc oxide

被引：42

作者：

Hauser, Mario ^{[1
]}

Hepting, Alexander ^{[1
]}

Hauschild, Robert ^{[1
]}

Zhou, Huijuan ^{[1
]}

Fallert, Johannes ^{[1
]}

Kalt, Heinz ^{[1
]}

Klingshirn, Claus ^{[1
]}

机构：

[1] Univ Karlsruhe TH, Inst Angew Phys, D-76131 Karlsruhe, Germany

来源：

APPLIED PHYSICS LETTERS | 2008年 / 92卷 / 21期

关键词：

D O I：

10.1063/1.2937442

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We report on the measurement of the absolute external luminescence quantum efficiency of various ZnO samples using a miniature integrating sphere fitted into a cryostat. Even the absolute luminescence quantum efficiencies per spectral interval are directly accessible. Measurements have been carried out on high quality bulk samples and different commercially available ZnO powders from 8 K up to room temperature. Activated processes lead to an overall decrease in the efficiency with temperature. All efficiencies are considerably below unity, making the identification of the luminescence decay time with the radiative life time very questionable. (C) 2008 American Institute of Physics.

引用

页数：3

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