Optical investigations of multi-dimensional ZnO hybrid structures

S. K. Mohanta; D. C. Kim; H. K. Cho; S. A. Oh; S. J. Chua; S. Tripathy

doi:10.1016/j.tsf.2009.03.048

Optical investigations of multi-dimensional ZnO hybrid structures

S. K. Mohanta, D. C. Kim, H. K. Cho, S. A. Oh, S. J. Chua, S. Tripathy

Department of Advanced Materials Science and Engineering

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

Abstract

The authors report on the optical properties of multi-dimensional ZnO hybrid structures, consisting of film (2D)/nanorods (1D)/sapphire substrate (2D), grown by metalorganic chemical vapor deposition (MOCVD). Photoluminescence investigations reveal that the sample with top layer grown at a decreased growth temperature of 240 °C and increased reactor pressure of 5 Torr exhibits superior emission properties. The presence of strong E₂^high optical phonon mode at 438.5 cm^{- 1} in the visible micro-Raman spectra demonstrates the wurtzite nature of ZnO. Although the ultraviolet Raman scattering measurements of the hybrid structures reveal the presence of in-plane tensile stress in the top ZnO layer, the sample with the improved emission performance shows the release of tensile stress.

Original language	English
Pages (from-to)	5161-5165
Number of pages	5
Journal	Thin Solid Films
Volume	517
Issue number	17
DOIs	https://doi.org/10.1016/j.tsf.2009.03.048
State	Published - 1 Jul 2009

Keywords

Hybrid structure
MOCVD
Nanomaterials
Photolumenescence
Raman scattering
Semiconducting II-VI materials
Stress
Zinc oxide

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10.1016/j.tsf.2009.03.048

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title = "Optical investigations of multi-dimensional ZnO hybrid structures",

abstract = "The authors report on the optical properties of multi-dimensional ZnO hybrid structures, consisting of film (2D)/nanorods (1D)/sapphire substrate (2D), grown by metalorganic chemical vapor deposition (MOCVD). Photoluminescence investigations reveal that the sample with top layer grown at a decreased growth temperature of 240 °C and increased reactor pressure of 5 Torr exhibits superior emission properties. The presence of strong E2high optical phonon mode at 438.5 cm- 1 in the visible micro-Raman spectra demonstrates the wurtzite nature of ZnO. Although the ultraviolet Raman scattering measurements of the hybrid structures reveal the presence of in-plane tensile stress in the top ZnO layer, the sample with the improved emission performance shows the release of tensile stress.",

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T1 - Optical investigations of multi-dimensional ZnO hybrid structures

AU - Mohanta, S. K.

AU - Kim, D. C.

AU - Cho, H. K.

AU - Oh, S. A.

AU - Chua, S. J.

AU - Tripathy, S.

PY - 2009/7/1

Y1 - 2009/7/1

N2 - The authors report on the optical properties of multi-dimensional ZnO hybrid structures, consisting of film (2D)/nanorods (1D)/sapphire substrate (2D), grown by metalorganic chemical vapor deposition (MOCVD). Photoluminescence investigations reveal that the sample with top layer grown at a decreased growth temperature of 240 °C and increased reactor pressure of 5 Torr exhibits superior emission properties. The presence of strong E2high optical phonon mode at 438.5 cm- 1 in the visible micro-Raman spectra demonstrates the wurtzite nature of ZnO. Although the ultraviolet Raman scattering measurements of the hybrid structures reveal the presence of in-plane tensile stress in the top ZnO layer, the sample with the improved emission performance shows the release of tensile stress.

AB - The authors report on the optical properties of multi-dimensional ZnO hybrid structures, consisting of film (2D)/nanorods (1D)/sapphire substrate (2D), grown by metalorganic chemical vapor deposition (MOCVD). Photoluminescence investigations reveal that the sample with top layer grown at a decreased growth temperature of 240 °C and increased reactor pressure of 5 Torr exhibits superior emission properties. The presence of strong E2high optical phonon mode at 438.5 cm- 1 in the visible micro-Raman spectra demonstrates the wurtzite nature of ZnO. Although the ultraviolet Raman scattering measurements of the hybrid structures reveal the presence of in-plane tensile stress in the top ZnO layer, the sample with the improved emission performance shows the release of tensile stress.

KW - Hybrid structure

KW - MOCVD

KW - Nanomaterials

KW - Photolumenescence

KW - Raman scattering

KW - Semiconducting II-VI materials

KW - Stress

KW - Zinc oxide

UR - https://www.scopus.com/pages/publications/65649084484

U2 - 10.1016/j.tsf.2009.03.048

DO - 10.1016/j.tsf.2009.03.048

M3 - Article

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SN - 0040-6090

VL - 517

SP - 5161

EP - 5165

JO - Thin Solid Films

JF - Thin Solid Films

IS - 17

ER -

Optical investigations of multi-dimensional ZnO hybrid structures

Abstract

Keywords

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