Pressure-dependent photoluminescence study of ZnO nanowires

W. Shan; W. Walukiewicz; J. W. Ager; K. M. Yu; Y. Zhang; S. S. Mao; R. Kling; C. Kirchner; A. Waag

doi:10.1063/1.1901827

Pressure-dependent photoluminescence study of ZnO nanowires

W. Shan, W. Walukiewicz, J. W. Ager, K. M. Yu, Y. Zhang, S. S. Mao, R. Kling, C. Kirchner, A. Waag

Mechanical & Nuclear Engineering

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Abstract

The pressure dependence of the photoluminescence (PL) transition associated with the fundamental bandgap of ZnO nanowires has been studied at pressures up to 15 GPa. The near-bandedge luminescence emission is found to shift toward higher energy with applied pressure at a rate of 29.2 meV/GPa with a small second-order term of -0.38 meVGPa2. An effective hydrostatic deformation potential -3.92±0.15 eV for the direct bandgap of the ZnO nanowires is derived from the results. The broad green emission band in ZnO depends on pressure with a linear slope of 15.9 meV/GPa and a quadratic coefficient of -0.71 meVGPa2. The results indicate that the initial states involved in the emission process are deep localized states.

Original language	British English
Article number	153117
Pages (from-to)	1-3
Number of pages	3
Journal	Applied Physics Letters
Volume	86
Issue number	15
DOIs	https://doi.org/10.1063/1.1901827
State	Published - 2005

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title = "Pressure-dependent photoluminescence study of ZnO nanowires",

abstract = "The pressure dependence of the photoluminescence (PL) transition associated with the fundamental bandgap of ZnO nanowires has been studied at pressures up to 15 GPa. The near-bandedge luminescence emission is found to shift toward higher energy with applied pressure at a rate of 29.2 meV/GPa with a small second-order term of -0.38 meVGPa2. An effective hydrostatic deformation potential -3.92±0.15 eV for the direct bandgap of the ZnO nanowires is derived from the results. The broad green emission band in ZnO depends on pressure with a linear slope of 15.9 meV/GPa and a quadratic coefficient of -0.71 meVGPa2. The results indicate that the initial states involved in the emission process are deep localized states.",

author = "W. Shan and W. Walukiewicz and Ager, {J. W.} and Yu, {K. M.} and Y. Zhang and Mao, {S. S.} and R. Kling and C. Kirchner and A. Waag",

note = "Funding Information: This work is supported by the Director, Office of Science, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering, of the U.S. Department of Energy under Contract No. DE-AC03-76SF00098.",

year = "2005",

doi = "10.1063/1.1901827",

language = "British English",

volume = "86",

pages = "1--3",

journal = "Applied Physics Letters",

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TY - JOUR

T1 - Pressure-dependent photoluminescence study of ZnO nanowires

AU - Shan, W.

AU - Walukiewicz, W.

AU - Ager, J. W.

AU - Yu, K. M.

AU - Zhang, Y.

AU - Mao, S. S.

AU - Kling, R.

AU - Kirchner, C.

AU - Waag, A.

N1 - Funding Information: This work is supported by the Director, Office of Science, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering, of the U.S. Department of Energy under Contract No. DE-AC03-76SF00098.

PY - 2005

Y1 - 2005

N2 - The pressure dependence of the photoluminescence (PL) transition associated with the fundamental bandgap of ZnO nanowires has been studied at pressures up to 15 GPa. The near-bandedge luminescence emission is found to shift toward higher energy with applied pressure at a rate of 29.2 meV/GPa with a small second-order term of -0.38 meVGPa2. An effective hydrostatic deformation potential -3.92±0.15 eV for the direct bandgap of the ZnO nanowires is derived from the results. The broad green emission band in ZnO depends on pressure with a linear slope of 15.9 meV/GPa and a quadratic coefficient of -0.71 meVGPa2. The results indicate that the initial states involved in the emission process are deep localized states.

AB - The pressure dependence of the photoluminescence (PL) transition associated with the fundamental bandgap of ZnO nanowires has been studied at pressures up to 15 GPa. The near-bandedge luminescence emission is found to shift toward higher energy with applied pressure at a rate of 29.2 meV/GPa with a small second-order term of -0.38 meVGPa2. An effective hydrostatic deformation potential -3.92±0.15 eV for the direct bandgap of the ZnO nanowires is derived from the results. The broad green emission band in ZnO depends on pressure with a linear slope of 15.9 meV/GPa and a quadratic coefficient of -0.71 meVGPa2. The results indicate that the initial states involved in the emission process are deep localized states.

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U2 - 10.1063/1.1901827

DO - 10.1063/1.1901827

M3 - Article

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SN - 0003-6951

VL - 86

SP - 1

EP - 3

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 15

M1 - 153117

ER -

Pressure-dependent photoluminescence study of ZnO nanowires

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