Microstructural and optical characteristics of solution-grown Ga-doped ZnO nanorod arrays

Huihu Wang; Seonghoon Baek; Jaejin Song; Jonghyuck Lee; Sangwoo Lim

doi:10.1088/0957-4484/19/7/075607

Microstructural and optical characteristics of solution-grown Ga-doped ZnO nanorod arrays

Huihu Wang, Seonghoon Baek, Jaejin Song, Jonghyuck Lee, Sangwoo Lim

Department of Chemical and Biomolecular Engineering

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

141 Citations (Scopus)

Abstract

Highly oriented Ga-doped zinc oxide (ZnO) nanorod arrays have been prepared on a ZnO-buffered silicon substrate in an aqueous solution, which is a mixture of methenamine (C₆H₁₂N₄), zinc nitrate hexahydrate (Zn(NO₃)₂·6H₂O), and gallium nitrate hydrate (Ga(NO₃)₃·xH₂O). The microstructure characteristics and optical properties of the nanorod arrays were analyzed using different characterization techniques including field-emission scanning electron microscopy (FESEM), x-ray photoelectron spectroscopy (XPS), and photoluminescence (PL). The experimental results show that the morphology, density, and surface compositions of ZnO nanorod arrays are sensitive to the concentration of gallium nitrate hydrate. The PL spectra of all ZnO nanorod arrays show three different emissions, including UV (ultraviolet), yellow, and NIR (near infrared) emissions. With the increase in the Ga doping level, the luminescence quality of ZnO nanorods has been improved. The peak of UV emission has a small redshift, which can be ascribed to the combined effect of size and Ga doping. Furthermore, Ga doping has caused defects that respond to NIR emission.

Original language	English
Article number	075607
Journal	Nanotechnology
Volume	19
Issue number	7
DOIs	https://doi.org/10.1088/0957-4484/19/7/075607
Publication status	Published - 2008

All Science Journal Classification (ASJC) codes

Bioengineering
Chemistry(all)
Materials Science(all)
Mechanics of Materials
Mechanical Engineering
Electrical and Electronic Engineering

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10.1088/0957-4484/19/7/075607

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title = "Microstructural and optical characteristics of solution-grown Ga-doped ZnO nanorod arrays",

abstract = "Highly oriented Ga-doped zinc oxide (ZnO) nanorod arrays have been prepared on a ZnO-buffered silicon substrate in an aqueous solution, which is a mixture of methenamine (C6H12N4), zinc nitrate hexahydrate (Zn(NO3)2·6H2O), and gallium nitrate hydrate (Ga(NO3)3·xH2O). The microstructure characteristics and optical properties of the nanorod arrays were analyzed using different characterization techniques including field-emission scanning electron microscopy (FESEM), x-ray photoelectron spectroscopy (XPS), and photoluminescence (PL). The experimental results show that the morphology, density, and surface compositions of ZnO nanorod arrays are sensitive to the concentration of gallium nitrate hydrate. The PL spectra of all ZnO nanorod arrays show three different emissions, including UV (ultraviolet), yellow, and NIR (near infrared) emissions. With the increase in the Ga doping level, the luminescence quality of ZnO nanorods has been improved. The peak of UV emission has a small redshift, which can be ascribed to the combined effect of size and Ga doping. Furthermore, Ga doping has caused defects that respond to NIR emission.",

author = "Huihu Wang and Seonghoon Baek and Jaejin Song and Jonghyuck Lee and Sangwoo Lim",

year = "2008",

doi = "10.1088/0957-4484/19/7/075607",

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journal = "Nanotechnology",

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T1 - Microstructural and optical characteristics of solution-grown Ga-doped ZnO nanorod arrays

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AU - Baek, Seonghoon

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AU - Lee, Jonghyuck

AU - Lim, Sangwoo

PY - 2008

Y1 - 2008

N2 - Highly oriented Ga-doped zinc oxide (ZnO) nanorod arrays have been prepared on a ZnO-buffered silicon substrate in an aqueous solution, which is a mixture of methenamine (C6H12N4), zinc nitrate hexahydrate (Zn(NO3)2·6H2O), and gallium nitrate hydrate (Ga(NO3)3·xH2O). The microstructure characteristics and optical properties of the nanorod arrays were analyzed using different characterization techniques including field-emission scanning electron microscopy (FESEM), x-ray photoelectron spectroscopy (XPS), and photoluminescence (PL). The experimental results show that the morphology, density, and surface compositions of ZnO nanorod arrays are sensitive to the concentration of gallium nitrate hydrate. The PL spectra of all ZnO nanorod arrays show three different emissions, including UV (ultraviolet), yellow, and NIR (near infrared) emissions. With the increase in the Ga doping level, the luminescence quality of ZnO nanorods has been improved. The peak of UV emission has a small redshift, which can be ascribed to the combined effect of size and Ga doping. Furthermore, Ga doping has caused defects that respond to NIR emission.

AB - Highly oriented Ga-doped zinc oxide (ZnO) nanorod arrays have been prepared on a ZnO-buffered silicon substrate in an aqueous solution, which is a mixture of methenamine (C6H12N4), zinc nitrate hexahydrate (Zn(NO3)2·6H2O), and gallium nitrate hydrate (Ga(NO3)3·xH2O). The microstructure characteristics and optical properties of the nanorod arrays were analyzed using different characterization techniques including field-emission scanning electron microscopy (FESEM), x-ray photoelectron spectroscopy (XPS), and photoluminescence (PL). The experimental results show that the morphology, density, and surface compositions of ZnO nanorod arrays are sensitive to the concentration of gallium nitrate hydrate. The PL spectra of all ZnO nanorod arrays show three different emissions, including UV (ultraviolet), yellow, and NIR (near infrared) emissions. With the increase in the Ga doping level, the luminescence quality of ZnO nanorods has been improved. The peak of UV emission has a small redshift, which can be ascribed to the combined effect of size and Ga doping. Furthermore, Ga doping has caused defects that respond to NIR emission.

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Microstructural and optical characteristics of solution-grown Ga-doped ZnO nanorod arrays

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