Conversion of ZnO microrods into microdisks like structures and its effect on photoluminescence properties

Prabhakar Rai; Sudarsan Raj; In Hwan Lee; Woon Ki Kwak; Yeon Tae Yu

doi:10.1016/j.ceramint.2013.03.098

Conversion of ZnO microrods into microdisks like structures and its effect on photoluminescence properties

Prabhakar Rai, Sudarsan Raj, In Hwan Lee, Woon Ki Kwak, Yeon Tae Yu

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

13 Citations (Scopus)

Abstract

ZnO microstructures were synthesized by the hydrothermal method. Scanning electron microscopy (SEM) revealed the formation of ZnO microrods in absence of trisodium citrate and hexagon-shaped ZnO microdisks in presence of trisodium citrate. The length and width of ZnO microrods were 3-5 μm and 500 nm-1 μm, respectively and they were tapered at both ends, whereas ZnO microdisks were 1-2 μm in diameter. Crystal growth mechanism suggested that citrate suppressed the growth of ZnO along c-axis which resulted into the formation of microdisks like structure. Photoluminescence (PL) spectroscopy showed a weak ultraviolet (UV) and strong green emission in ZnO microrods but a strong UV and very weak green emission in ZnO microdisks. It was suggested that the green emission in ZnO microrods was due to structural defects present at polar planes which was reduced in microdisks with reduction in polar planes.

Original language	English
Pages (from-to)	8287-8291
Number of pages	5
Journal	Ceramics International
Volume	39
Issue number	7
DOIs	https://doi.org/10.1016/j.ceramint.2013.03.098
Publication status	Published - 2013 Sept
Externally published	Yes

Bibliographical note

Funding Information:
This paper was supported by (a) Research Funds of Chonbuk National University in 2012 , (b) PostBK21 Program from Ministry of Education and Human-Resource Development and (c) National Research Foundation (NRF) Grant Funded by the Korea government (MEST) ( NRF- 2010–0019626, 2010-0023363 ).

Keywords

Hydrothermal synthesis
Microstructures
Photoluminescence
ZnO

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Ceramics and Composites
Process Chemistry and Technology
Surfaces, Coatings and Films
Materials Chemistry

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10.1016/j.ceramint.2013.03.098

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title = "Conversion of ZnO microrods into microdisks like structures and its effect on photoluminescence properties",

abstract = "ZnO microstructures were synthesized by the hydrothermal method. Scanning electron microscopy (SEM) revealed the formation of ZnO microrods in absence of trisodium citrate and hexagon-shaped ZnO microdisks in presence of trisodium citrate. The length and width of ZnO microrods were 3-5 μm and 500 nm-1 μm, respectively and they were tapered at both ends, whereas ZnO microdisks were 1-2 μm in diameter. Crystal growth mechanism suggested that citrate suppressed the growth of ZnO along c-axis which resulted into the formation of microdisks like structure. Photoluminescence (PL) spectroscopy showed a weak ultraviolet (UV) and strong green emission in ZnO microrods but a strong UV and very weak green emission in ZnO microdisks. It was suggested that the green emission in ZnO microrods was due to structural defects present at polar planes which was reduced in microdisks with reduction in polar planes.",

keywords = "Hydrothermal synthesis, Microstructures, Photoluminescence, ZnO",

author = "Prabhakar Rai and Sudarsan Raj and Lee, {In Hwan} and Kwak, {Woon Ki} and Yu, {Yeon Tae}",

note = "Funding Information: This paper was supported by (a) Research Funds of Chonbuk National University in 2012 , (b) PostBK21 Program from Ministry of Education and Human-Resource Development and (c) National Research Foundation (NRF) Grant Funded by the Korea government (MEST) ( NRF- 2010–0019626, 2010-0023363 ).",

year = "2013",

month = sep,

doi = "10.1016/j.ceramint.2013.03.098",

language = "English",

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AU - Rai, Prabhakar

AU - Raj, Sudarsan

AU - Lee, In Hwan

AU - Kwak, Woon Ki

AU - Yu, Yeon Tae

N1 - Funding Information: This paper was supported by (a) Research Funds of Chonbuk National University in 2012 , (b) PostBK21 Program from Ministry of Education and Human-Resource Development and (c) National Research Foundation (NRF) Grant Funded by the Korea government (MEST) ( NRF- 2010–0019626, 2010-0023363 ).

PY - 2013/9

Y1 - 2013/9

N2 - ZnO microstructures were synthesized by the hydrothermal method. Scanning electron microscopy (SEM) revealed the formation of ZnO microrods in absence of trisodium citrate and hexagon-shaped ZnO microdisks in presence of trisodium citrate. The length and width of ZnO microrods were 3-5 μm and 500 nm-1 μm, respectively and they were tapered at both ends, whereas ZnO microdisks were 1-2 μm in diameter. Crystal growth mechanism suggested that citrate suppressed the growth of ZnO along c-axis which resulted into the formation of microdisks like structure. Photoluminescence (PL) spectroscopy showed a weak ultraviolet (UV) and strong green emission in ZnO microrods but a strong UV and very weak green emission in ZnO microdisks. It was suggested that the green emission in ZnO microrods was due to structural defects present at polar planes which was reduced in microdisks with reduction in polar planes.

AB - ZnO microstructures were synthesized by the hydrothermal method. Scanning electron microscopy (SEM) revealed the formation of ZnO microrods in absence of trisodium citrate and hexagon-shaped ZnO microdisks in presence of trisodium citrate. The length and width of ZnO microrods were 3-5 μm and 500 nm-1 μm, respectively and they were tapered at both ends, whereas ZnO microdisks were 1-2 μm in diameter. Crystal growth mechanism suggested that citrate suppressed the growth of ZnO along c-axis which resulted into the formation of microdisks like structure. Photoluminescence (PL) spectroscopy showed a weak ultraviolet (UV) and strong green emission in ZnO microrods but a strong UV and very weak green emission in ZnO microdisks. It was suggested that the green emission in ZnO microrods was due to structural defects present at polar planes which was reduced in microdisks with reduction in polar planes.

KW - Hydrothermal synthesis

KW - Microstructures

KW - Photoluminescence

KW - ZnO

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DO - 10.1016/j.ceramint.2013.03.098

M3 - Article

AN - SCOPUS:84880318912

SN - 0272-8842

VL - 39

SP - 8287

EP - 8291

JO - Ceramics International

JF - Ceramics International

IS - 7

ER -

Conversion of ZnO microrods into microdisks like structures and its effect on photoluminescence properties

Abstract

Bibliographical note

Keywords

ASJC Scopus subject areas

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