Improvement of optical properties of post-annealed ZnO nanorods

Juneyoung Lee; Jooyoung Chung; Sangwoo Lim

doi:10.1016/j.physe.2010.04.013

Improvement of optical properties of post-annealed ZnO nanorods

Juneyoung Lee, Jooyoung Chung, Sangwoo Lim

Department of Chemical and Biomolecular Engineering

Research output: Contribution to journal › Article › peer-review

79 Citations (Scopus)

Abstract

Well aligned zinc oxide (ZnO) nanorods were synthesized on a Si substrate with a hydrothermal method. The effects of annealing on the optical properties of ZnO nanorods were examined by annealing samples in oxygen or forming gas (H₂:N₂=1:9). The optical properties of the ZnO nanorods were investigated using room temperature photoluminescence (PL) measurement, which revealed two emission bands. After each annealing, the intensity of ultraviolet (UV) emission increased, while the intensity of visible emission decreased. The reason for the increase in the ratio of UV to visible emission, I_UV/I_DLE, of ZnO nanorods annealed in oxygen or forming gas is attributed to the reduction in the concentration of the oxygen defects and to the less OH groups on the ZnO nanorod surface. Effects of crystal size, diameter, and chemisorbed oxygen were precluded.

Original language	English
Pages (from-to)	2143-2146
Number of pages	4
Journal	Physica E: Low-Dimensional Systems and Nanostructures
Volume	42
Issue number	8
DOIs	https://doi.org/10.1016/j.physe.2010.04.013
Publication status	Published - 2010 Jun

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Condensed Matter Physics

Access to Document

10.1016/j.physe.2010.04.013

Cite this

@article{8fd89bee1fb94259b2aac01cf392a271,

title = "Improvement of optical properties of post-annealed ZnO nanorods",

abstract = "Well aligned zinc oxide (ZnO) nanorods were synthesized on a Si substrate with a hydrothermal method. The effects of annealing on the optical properties of ZnO nanorods were examined by annealing samples in oxygen or forming gas (H2:N2=1:9). The optical properties of the ZnO nanorods were investigated using room temperature photoluminescence (PL) measurement, which revealed two emission bands. After each annealing, the intensity of ultraviolet (UV) emission increased, while the intensity of visible emission decreased. The reason for the increase in the ratio of UV to visible emission, IUV/IDLE, of ZnO nanorods annealed in oxygen or forming gas is attributed to the reduction in the concentration of the oxygen defects and to the less OH groups on the ZnO nanorod surface. Effects of crystal size, diameter, and chemisorbed oxygen were precluded.",

author = "Juneyoung Lee and Jooyoung Chung and Sangwoo Lim",

year = "2010",

month = jun,

doi = "10.1016/j.physe.2010.04.013",

language = "English",

volume = "42",

pages = "2143--2146",

journal = "Physica E: Low-Dimensional Systems and Nanostructures",

issn = "1386-9477",

publisher = "Elsevier",

number = "8",

}

TY - JOUR

T1 - Improvement of optical properties of post-annealed ZnO nanorods

AU - Lee, Juneyoung

AU - Chung, Jooyoung

AU - Lim, Sangwoo

PY - 2010/6

Y1 - 2010/6

N2 - Well aligned zinc oxide (ZnO) nanorods were synthesized on a Si substrate with a hydrothermal method. The effects of annealing on the optical properties of ZnO nanorods were examined by annealing samples in oxygen or forming gas (H2:N2=1:9). The optical properties of the ZnO nanorods were investigated using room temperature photoluminescence (PL) measurement, which revealed two emission bands. After each annealing, the intensity of ultraviolet (UV) emission increased, while the intensity of visible emission decreased. The reason for the increase in the ratio of UV to visible emission, IUV/IDLE, of ZnO nanorods annealed in oxygen or forming gas is attributed to the reduction in the concentration of the oxygen defects and to the less OH groups on the ZnO nanorod surface. Effects of crystal size, diameter, and chemisorbed oxygen were precluded.

AB - Well aligned zinc oxide (ZnO) nanorods were synthesized on a Si substrate with a hydrothermal method. The effects of annealing on the optical properties of ZnO nanorods were examined by annealing samples in oxygen or forming gas (H2:N2=1:9). The optical properties of the ZnO nanorods were investigated using room temperature photoluminescence (PL) measurement, which revealed two emission bands. After each annealing, the intensity of ultraviolet (UV) emission increased, while the intensity of visible emission decreased. The reason for the increase in the ratio of UV to visible emission, IUV/IDLE, of ZnO nanorods annealed in oxygen or forming gas is attributed to the reduction in the concentration of the oxygen defects and to the less OH groups on the ZnO nanorod surface. Effects of crystal size, diameter, and chemisorbed oxygen were precluded.

UR - http://www.scopus.com/inward/record.url?scp=77955306049&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=77955306049&partnerID=8YFLogxK

U2 - 10.1016/j.physe.2010.04.013

DO - 10.1016/j.physe.2010.04.013

M3 - Article

AN - SCOPUS:77955306049

SN - 1386-9477

VL - 42

SP - 2143

EP - 2146

JO - Physica E: Low-Dimensional Systems and Nanostructures

JF - Physica E: Low-Dimensional Systems and Nanostructures

IS - 8

ER -

Improvement of optical properties of post-annealed ZnO nanorods

Abstract

All Science Journal Classification (ASJC) codes

Access to Document

Other files and links

Fingerprint

Cite this