Defects in ZnO nanorods prepared by a hydrothermal method

K. H. Tam; C. K. Cheung; Y. H. Leung; A. B. Djurišić; C. C. Ling; C. D. Beling; S. Fung; Wai Ming Kwok; W. K. Chan; D. L. Phillips; L. Ding; W. K. Ge

doi:10.1021/jp063239w

Defects in ZnO nanorods prepared by a hydrothermal method

K. H. Tam, C. K. Cheung, Y. H. Leung, A. B. Djurišić, C. C. Ling, C. D. Beling, S. Fung, Wai Ming Kwok, W. K. Chan, D. L. Phillips, L. Ding, W. K. Ge

Research output: Journal article publication › Journal article › Academic research › peer-review

756 Citations (Scopus)

Abstract

ZnO nanorod arrays were fabricated using a hydrothermal method. The nanorods were studied by scanning electron microscopy, photoluminescence (PL), time-resolved PL, X-ray photoelectron spectroscopy, and positron annihilation spectroscopy before and after annealing in different environments and at different temperatures. Annealing atmosphere and temperature had significant effects on the PL spectrum, while in all cases the positron diffusion length and PL decay times were increased. We found that, while the defect emission can be significantly reduced by annealing at 200°C, the rods still have large defect concentrations as confirmed by their low positron diffusion length and short PL decay time constants.

Original language	English
Pages (from-to)	20865-20871
Number of pages	7
Journal	Journal of Physical Chemistry B
Volume	110
Issue number	42
DOIs	https://doi.org/10.1021/jp063239w
Publication status	Published - 26 Oct 2006
Externally published	Yes

ASJC Scopus subject areas

Physical and Theoretical Chemistry
Surfaces, Coatings and Films
Materials Chemistry

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10.1021/jp063239w

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title = "Defects in ZnO nanorods prepared by a hydrothermal method",

abstract = "ZnO nanorod arrays were fabricated using a hydrothermal method. The nanorods were studied by scanning electron microscopy, photoluminescence (PL), time-resolved PL, X-ray photoelectron spectroscopy, and positron annihilation spectroscopy before and after annealing in different environments and at different temperatures. Annealing atmosphere and temperature had significant effects on the PL spectrum, while in all cases the positron diffusion length and PL decay times were increased. We found that, while the defect emission can be significantly reduced by annealing at 200°C, the rods still have large defect concentrations as confirmed by their low positron diffusion length and short PL decay time constants.",

author = "Tam, {K. H.} and Cheung, {C. K.} and Leung, {Y. H.} and Djuri{\v s}i{\'c}, {A. B.} and Ling, {C. C.} and Beling, {C. D.} and S. Fung and Kwok, {Wai Ming} and Chan, {W. K.} and Phillips, {D. L.} and L. Ding and Ge, {W. K.}",

year = "2006",

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doi = "10.1021/jp063239w",

language = "English",

volume = "110",

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T1 - Defects in ZnO nanorods prepared by a hydrothermal method

AU - Tam, K. H.

AU - Cheung, C. K.

AU - Leung, Y. H.

AU - Djurišić, A. B.

AU - Ling, C. C.

AU - Beling, C. D.

AU - Fung, S.

AU - Kwok, Wai Ming

AU - Chan, W. K.

AU - Phillips, D. L.

AU - Ding, L.

AU - Ge, W. K.

PY - 2006/10/26

Y1 - 2006/10/26

N2 - ZnO nanorod arrays were fabricated using a hydrothermal method. The nanorods were studied by scanning electron microscopy, photoluminescence (PL), time-resolved PL, X-ray photoelectron spectroscopy, and positron annihilation spectroscopy before and after annealing in different environments and at different temperatures. Annealing atmosphere and temperature had significant effects on the PL spectrum, while in all cases the positron diffusion length and PL decay times were increased. We found that, while the defect emission can be significantly reduced by annealing at 200°C, the rods still have large defect concentrations as confirmed by their low positron diffusion length and short PL decay time constants.

AB - ZnO nanorod arrays were fabricated using a hydrothermal method. The nanorods were studied by scanning electron microscopy, photoluminescence (PL), time-resolved PL, X-ray photoelectron spectroscopy, and positron annihilation spectroscopy before and after annealing in different environments and at different temperatures. Annealing atmosphere and temperature had significant effects on the PL spectrum, while in all cases the positron diffusion length and PL decay times were increased. We found that, while the defect emission can be significantly reduced by annealing at 200°C, the rods still have large defect concentrations as confirmed by their low positron diffusion length and short PL decay time constants.

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DO - 10.1021/jp063239w

M3 - Journal article

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EP - 20871

JO - Journal of Physical Chemistry B

JF - Journal of Physical Chemistry B

IS - 42

ER -

Defects in ZnO nanorods prepared by a hydrothermal method

Abstract

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