Defect-related visible luminescence of ZnO nanorods annealed in oxygen ambient

ZnO nanorods prepared by a solution-phase method are annealed at different temperatures in oxygen ambient. The luminescence properties of the samples are investigated. In the same excitation condition, the photoluminescence (PL) spectra of all samples show an ultraviolet (UV) emission and a broad st...

Full description

Saved in:
Bibliographic Details
Published inOptoelectronics letters Vol. 8; no. 1; pp. 4 - 8
Main Author 蔡井维 徐建萍 张晓松 牛喜平 邢彤焱 季婷 李岚
Format Journal Article
LanguageEnglish
Published Heidelberg Tianjin University of Technology 2012
Subjects
Online AccessGet full text
ISSN1673-1905
1993-5013
DOI10.1007/s11801-012-1042-2

Cover

More Information
Summary:ZnO nanorods prepared by a solution-phase method are annealed at different temperatures in oxygen ambient. The luminescence properties of the samples are investigated. In the same excitation condition, the photoluminescence (PL) spectra of all samples show an ultraviolet (UV) emission and a broad strong visible emission band. The asymmetric visible emission band of annealed samples has a red-shift as the annealing temperature increasing from 200 ℃ to 600℃ and it can be deconvoluted into two subband emissions centered at 535 nm (green emission) and 611 nm (orange-red emission) by Gaussian-fitting analysis. Analyses of PL excitation (PLE) spectra and PL spectra at different excitation wavelengths reveal that the green emission and the orange-red emission have a uniform initial state, which can be attributed to the electron transition from Zn interstitial (Zni) to oxygen vacancy (Vo) and oxygen interstitial (Oi), respectively.
Bibliography:12-1370/TN
ZnO nanorods prepared by a solution-phase method are annealed at different temperatures in oxygen ambient. The luminescence properties of the samples are investigated. In the same excitation condition, the photoluminescence (PL) spectra of all samples show an ultraviolet (UV) emission and a broad strong visible emission band. The asymmetric visible emission band of annealed samples has a red-shift as the annealing temperature increasing from 200 ℃ to 600℃ and it can be deconvoluted into two subband emissions centered at 535 nm (green emission) and 611 nm (orange-red emission) by Gaussian-fitting analysis. Analyses of PL excitation (PLE) spectra and PL spectra at different excitation wavelengths reveal that the green emission and the orange-red emission have a uniform initial state, which can be attributed to the electron transition from Zn interstitial (Zni) to oxygen vacancy (Vo) and oxygen interstitial (Oi), respectively.
ISSN:1673-1905
1993-5013
DOI:10.1007/s11801-012-1042-2