Improvement of photoluminescence and lasing properties in ZnO submicron spheres by elimination of surface-trapped state

Tsen Fang Dai, Wei Chih Hsu, Hsu Cheng Hsu

研究成果: Article同行評審

19 引文 斯高帕斯(Scopus)

摘要

We report on the enhancement of photoluminescence and laser action behaviors of ZnO submicron spheres fabricated by a sol-gel process. As annealing temperature increases, intense ultraviolet excitonic emission at room temperature can be observed. Upon pulsed excitations, the lasing threshold gradually decreases as annealed temperature increases, which is consistent with the results of the ratio of surface-trapped exciton to donorbound exciton emissions at low temperature. X-ray photoelectron spectroscopy confirmed that adsorbed OH bonds played a critical role in trapping species of exciton at the ZnO surface. The superior optical properties of high-annealing ZnO mainly result from the elimination of a surface-trapped state.

原文English
頁(從 - 到)27169-27174
頁數6
期刊Optics Express
22
發行號22
DOIs
出版狀態Published - 2014

All Science Journal Classification (ASJC) codes

  • 原子與分子物理與光學

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