Photoluminescent characteristics of ZnO nanorods and ZnO/ZnMgO nanorod heterostructures

Gyu Chul Yi; Won Il Park; Jinkyoung Yoo; Dong Wook Kim; Taiha Joo; T. Yatsui; J. Lim; M. Ohtsu

doi:10.1117/12.631517

Photoluminescent characteristics of ZnO nanorods and ZnO/ZnMgO nanorod heterostructures

Gyu Chul Yi, Won Il Park, Jinkyoung Yoo, Dong Wook Kim, Taiha Joo, T. Yatsui, J. Lim, M. Ohtsu

Department of Physics

Research output: Contribution to journal › Conference article › peer-review

1 Scopus citations

Abstract

We report on photoluminescent properties of ultrafine ZnO nanorods and ZnO/Zn_0.8Mg_0.2O nanorod quantum-well structures. The catalyst-free metalorganic chemical vapor deposition (MOCVD) technique enables control of ZnO nanorod diameters in the range of 5 to 150 nm. From the PL spectra of ultrafine ZnO nanorods with a mean diameter smaller than 10 nm, a systematic blue-shift in their PL peak position was observed by decreasing their diameter, presumably due to the quantum confinement effect along the radial direction in ZnO nanorods. In addition, we obtained time-integrated and time-resolved PL spectra of ZnO/Zn_0.8Mg_0.2O nanorod single-quantum-well structures (SQWs) in the temperature range of 10 K to 300 K. The nanorod SQWs also showed a PL blue-shift and the energy shift was dependent on ZnO well layer width. The PL peak position shift originates from the quantum confinement effect of carriers in nanorod quantum structures. Furthermore, we investigated spatially-resolved PL spectra of individual nanorod SQWs using scanning near-field optical microscopy.

Original language	English
Article number	601301
Journal	Proceedings of SPIE - The International Society for Optical Engineering
Volume	6013
DOIs	https://doi.org/10.1117/12.631517
State	Published - 2005
Event	Optoelectronic Devices: Physics, Fabrication, and Application II - Boston, MA, United States Duration: 24 Oct 2005 → 25 Oct 2005

Keywords

Nanorods
Photoluminescence
Quantum structures
ZnO

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title = "Photoluminescent characteristics of ZnO nanorods and ZnO/ZnMgO nanorod heterostructures",

abstract = "We report on photoluminescent properties of ultrafine ZnO nanorods and ZnO/Zn0.8Mg0.2O nanorod quantum-well structures. The catalyst-free metalorganic chemical vapor deposition (MOCVD) technique enables control of ZnO nanorod diameters in the range of 5 to 150 nm. From the PL spectra of ultrafine ZnO nanorods with a mean diameter smaller than 10 nm, a systematic blue-shift in their PL peak position was observed by decreasing their diameter, presumably due to the quantum confinement effect along the radial direction in ZnO nanorods. In addition, we obtained time-integrated and time-resolved PL spectra of ZnO/Zn0.8Mg0.2O nanorod single-quantum-well structures (SQWs) in the temperature range of 10 K to 300 K. The nanorod SQWs also showed a PL blue-shift and the energy shift was dependent on ZnO well layer width. The PL peak position shift originates from the quantum confinement effect of carriers in nanorod quantum structures. Furthermore, we investigated spatially-resolved PL spectra of individual nanorod SQWs using scanning near-field optical microscopy.",

keywords = "Nanorods, Photoluminescence, Quantum structures, ZnO",

author = "Yi, {Gyu Chul} and Park, {Won Il} and Jinkyoung Yoo and Kim, {Dong Wook} and Taiha Joo and T. Yatsui and J. Lim and M. Ohtsu",

year = "2005",

doi = "10.1117/12.631517",

language = "English",

volume = "6013",

journal = "Proceedings of SPIE - The International Society for Optical Engineering",

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TY - JOUR

T1 - Photoluminescent characteristics of ZnO nanorods and ZnO/ZnMgO nanorod heterostructures

AU - Yi, Gyu Chul

AU - Park, Won Il

AU - Yoo, Jinkyoung

AU - Kim, Dong Wook

AU - Joo, Taiha

AU - Yatsui, T.

AU - Lim, J.

AU - Ohtsu, M.

PY - 2005

Y1 - 2005

N2 - We report on photoluminescent properties of ultrafine ZnO nanorods and ZnO/Zn0.8Mg0.2O nanorod quantum-well structures. The catalyst-free metalorganic chemical vapor deposition (MOCVD) technique enables control of ZnO nanorod diameters in the range of 5 to 150 nm. From the PL spectra of ultrafine ZnO nanorods with a mean diameter smaller than 10 nm, a systematic blue-shift in their PL peak position was observed by decreasing their diameter, presumably due to the quantum confinement effect along the radial direction in ZnO nanorods. In addition, we obtained time-integrated and time-resolved PL spectra of ZnO/Zn0.8Mg0.2O nanorod single-quantum-well structures (SQWs) in the temperature range of 10 K to 300 K. The nanorod SQWs also showed a PL blue-shift and the energy shift was dependent on ZnO well layer width. The PL peak position shift originates from the quantum confinement effect of carriers in nanorod quantum structures. Furthermore, we investigated spatially-resolved PL spectra of individual nanorod SQWs using scanning near-field optical microscopy.

AB - We report on photoluminescent properties of ultrafine ZnO nanorods and ZnO/Zn0.8Mg0.2O nanorod quantum-well structures. The catalyst-free metalorganic chemical vapor deposition (MOCVD) technique enables control of ZnO nanorod diameters in the range of 5 to 150 nm. From the PL spectra of ultrafine ZnO nanorods with a mean diameter smaller than 10 nm, a systematic blue-shift in their PL peak position was observed by decreasing their diameter, presumably due to the quantum confinement effect along the radial direction in ZnO nanorods. In addition, we obtained time-integrated and time-resolved PL spectra of ZnO/Zn0.8Mg0.2O nanorod single-quantum-well structures (SQWs) in the temperature range of 10 K to 300 K. The nanorod SQWs also showed a PL blue-shift and the energy shift was dependent on ZnO well layer width. The PL peak position shift originates from the quantum confinement effect of carriers in nanorod quantum structures. Furthermore, we investigated spatially-resolved PL spectra of individual nanorod SQWs using scanning near-field optical microscopy.

KW - Nanorods

KW - Photoluminescence

KW - Quantum structures

KW - ZnO

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DO - 10.1117/12.631517

M3 - Conference article

AN - SCOPUS:33644765979

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JO - Proceedings of SPIE - The International Society for Optical Engineering

JF - Proceedings of SPIE - The International Society for Optical Engineering

SN - 0277-786X

M1 - 601301

Y2 - 24 October 2005 through 25 October 2005

ER -

Photoluminescent characteristics of ZnO nanorods and ZnO/ZnMgO nanorod heterostructures

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