Investigation of structured green-band emission and electron-phonon interactions in vertically aligned ZnO nanowires

Rui Chen; Yeeyan Tay; Jun Ye; Yang Zhao; Guozhong Xing; Tom Wu; Handong Sun

doi:10.1021/jp1064209

Investigation of structured green-band emission and electron-phonon interactions in vertically aligned ZnO nanowires

Rui Chen, Yeeyan Tay, Jun Ye, Yang Zhao, Guozhong Xing, Tom Wu, Handong Sun^*

^*Corresponding author for this work

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

27 Scopus citations

Abstract

We have investigated the green band (GB) emission from vertically aligned ZnO nanowires (NWs) prepared by vapor-liquid-solid growth technique. At low temperatures, the GB emission consists of two sets of zero phonon lines and their phonon replicas independent of the laser excitation power. Temperature-dependent photoluminescence (PL) measurement is performed at temperatures from 10 to 300 K, and the thermal evolution of peak widths and the origin of PL quenching at high temperatures are discussed in detail. The multimode Brownian oscillator model is adopted to reproduce the structured GB and to determine the Huang-Rhys factor. It is found that the two electronic transitions are strongly coupled to different LO phonon modes, and the size-dependent electron-phonon coupling strength is examined.

Original language	English (US)
Pages (from-to)	17889-17893
Number of pages	5
Journal	JOURNAL OF PHYSICAL CHEMISTRY C
Volume	114
Issue number	41
DOIs	https://doi.org/10.1021/jp1064209
State	Published - Oct 21 2010
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
General Energy
Physical and Theoretical Chemistry
Surfaces, Coatings and Films

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title = "Investigation of structured green-band emission and electron-phonon interactions in vertically aligned ZnO nanowires",

abstract = "We have investigated the green band (GB) emission from vertically aligned ZnO nanowires (NWs) prepared by vapor-liquid-solid growth technique. At low temperatures, the GB emission consists of two sets of zero phonon lines and their phonon replicas independent of the laser excitation power. Temperature-dependent photoluminescence (PL) measurement is performed at temperatures from 10 to 300 K, and the thermal evolution of peak widths and the origin of PL quenching at high temperatures are discussed in detail. The multimode Brownian oscillator model is adopted to reproduce the structured GB and to determine the Huang-Rhys factor. It is found that the two electronic transitions are strongly coupled to different LO phonon modes, and the size-dependent electron-phonon coupling strength is examined.",

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T1 - Investigation of structured green-band emission and electron-phonon interactions in vertically aligned ZnO nanowires

AU - Chen, Rui

AU - Tay, Yeeyan

AU - Ye, Jun

AU - Zhao, Yang

AU - Xing, Guozhong

AU - Wu, Tom

AU - Sun, Handong

PY - 2010/10/21

Y1 - 2010/10/21

N2 - We have investigated the green band (GB) emission from vertically aligned ZnO nanowires (NWs) prepared by vapor-liquid-solid growth technique. At low temperatures, the GB emission consists of two sets of zero phonon lines and their phonon replicas independent of the laser excitation power. Temperature-dependent photoluminescence (PL) measurement is performed at temperatures from 10 to 300 K, and the thermal evolution of peak widths and the origin of PL quenching at high temperatures are discussed in detail. The multimode Brownian oscillator model is adopted to reproduce the structured GB and to determine the Huang-Rhys factor. It is found that the two electronic transitions are strongly coupled to different LO phonon modes, and the size-dependent electron-phonon coupling strength is examined.

AB - We have investigated the green band (GB) emission from vertically aligned ZnO nanowires (NWs) prepared by vapor-liquid-solid growth technique. At low temperatures, the GB emission consists of two sets of zero phonon lines and their phonon replicas independent of the laser excitation power. Temperature-dependent photoluminescence (PL) measurement is performed at temperatures from 10 to 300 K, and the thermal evolution of peak widths and the origin of PL quenching at high temperatures are discussed in detail. The multimode Brownian oscillator model is adopted to reproduce the structured GB and to determine the Huang-Rhys factor. It is found that the two electronic transitions are strongly coupled to different LO phonon modes, and the size-dependent electron-phonon coupling strength is examined.

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JF - JOURNAL OF PHYSICAL CHEMISTRY C

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ER -

Investigation of structured green-band emission and electron-phonon interactions in vertically aligned ZnO nanowires

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