Fabrication and low-temperature photoluminescence spectra of Mn-doped ZnO nanowires

被引：0
|
作者：
Jun Zhang
Feihong Jiang
Shuanghong Ding
机构：
[1] Yantai University,Key Laboratory of Optoelectronic Information Techniques of Shandong, Institute Optoelectronic Information Science &Techniques
来源：
Applied Physics A | 2012年 / 109卷
关键词：
Free Exciton; Oscillatory Structure; Phonon Replica; Energy Periodicity; Free Exciton Transition;
D O I：
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学科分类号：
摘要：
Mn-doped ZnO nanowires have been fabricated through a high temperature vapor-solid deposition process. The low-temperature photoluminescence spectra of the samples show that there are multipeak emissions at the ultraviolet (UV) region (about 3.4–3.0 eV). The excitonic and phonon-assisted transitions in Mn-doped ZnO nanowires were investigated. The results show that there is an obvious oscillatory structure emission at the UV region under low temperature from 12–125 K. The oscillatory structure has an energy periodicity about 70 meV and the oscillatory structure is mainly attributed to longitudinal optical (LO) phonon replicas of free excitons (FX). The multipeak emissions at 12 K are attributed to a donor-bound exciton (DBX, 3.3617 eV), 1LO-phonon replicas of a free exciton (FX-1LO, 3.3105 eV), 2LO-phonon replicas of a free exciton (FX-2LO, 3.2396 eV), and 3LO-phonon replicas of a free exciton (FX-3LO, 3.1692 eV), respectively. The intensity of UV emission and the efficiency of emission from the Mn-doped ZnO nanowires are improved.
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页码：255 / 259
页数：4
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