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

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...

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Veröffentlicht in:	Applied physics. A, Materials science & processing Materials science & processing, 2012-11, Vol.109 (2), p.255-259
Hauptverfasser:	Zhang, Jun, Jiang, Feihong, Ding, Shuanghong
Format:	Artikel
Sprache:	eng
Schlagworte:	Characterization and Evaluation of Materials Condensed Matter Physics Condensed matter: electronic structure, electrical, magnetic, and optical properties Cross-disciplinary physics: materials science rheology Electron states Exact sciences and technology Excitons and related phenomena Ii-vi semiconductors Machines Manufacturing Materials science Nanoscale materials and structures: fabrication and characterization Nanotechnology Optical and Electronic Materials Optical properties and condensed-matter spectroscopy and other interactions of matter with particles and radiation Optical properties of low-dimensional, mesoscopic, and nanoscale materials and structures Photoluminescence Physics Physics and Astronomy Processes Quantum wires Rapid Communication Surfaces and Interfaces Thin Films
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Zusammenfassung:	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.
ISSN:	0947-8396 1432-0630
DOI:	10.1007/s00339-012-7294-7