The optical properties of ZnO nanoparticles capped with polyvinyl butyral

Y. H. Tong; Y. C. Liu; S. X. Lu; L. Dong; S. J. Chen; Z. Y. Xiao

doi:10.1023/B:JSST.0000039500.48283.5a

The optical properties of ZnO nanoparticles capped with polyvinyl butyral

Y. H. Tong, Y. C. Liu^*, S. X. Lu, L. Dong, S. J. Chen, Z. Y. Xiao

^*Corresponding author for this work

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

87 Citations (Scopus)

Abstract

ZnO nanoparticles capped with polyvinyl butyral (PVB) have been synthesized by the sol-gel process. Photoluminescence (PL) spectra show a remarkable decrease in visible emission intensity after ZnO nanoparticles are capped with PVB, which indicates that dangling bonds and defect states at the surface of ZnO nanoparticles are markedly passivated. As a result, the process of surface-trapped hole tunneling back into the panicles to form V**₀ recombination center is blocked. The PL spectra of thin films show a strong ultraviolet (UV) emission with very weak visible emission. The typical intensity ratio of the UV emission at 3.45 eV to the visible emission at about 2.41 eV is 43.3, which shows an obvious improvement in luminescence properties by the surface passivation with PVB. Low-temperature PL spectra of ZnO powder at 93.8 K are dominated by free exciton, bound exciton and the LO-phonon replica of the bound exciton.

Original language	English
Pages (from-to)	157-161
Number of pages	5
Journal	Journal of Sol-Gel Science and Technology
Volume	30
Issue number	3
DOIs	https://doi.org/10.1023/B:JSST.0000039500.48283.5a
Publication status	Published - Jun 2004
Externally published	Yes

Keywords

Nanoparticle
Photoluminescence
Polyvinyl butyral
Surface passivation
Zno

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10.1023/B:JSST.0000039500.48283.5a

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title = "The optical properties of ZnO nanoparticles capped with polyvinyl butyral",

abstract = "ZnO nanoparticles capped with polyvinyl butyral (PVB) have been synthesized by the sol-gel process. Photoluminescence (PL) spectra show a remarkable decrease in visible emission intensity after ZnO nanoparticles are capped with PVB, which indicates that dangling bonds and defect states at the surface of ZnO nanoparticles are markedly passivated. As a result, the process of surface-trapped hole tunneling back into the panicles to form V**0 recombination center is blocked. The PL spectra of thin films show a strong ultraviolet (UV) emission with very weak visible emission. The typical intensity ratio of the UV emission at 3.45 eV to the visible emission at about 2.41 eV is 43.3, which shows an obvious improvement in luminescence properties by the surface passivation with PVB. Low-temperature PL spectra of ZnO powder at 93.8 K are dominated by free exciton, bound exciton and the LO-phonon replica of the bound exciton.",

keywords = "Nanoparticle, Photoluminescence, Polyvinyl butyral, Surface passivation, Zno",

author = "Tong, {Y. H.} and Liu, {Y. C.} and Lu, {S. X.} and L. Dong and Chen, {S. J.} and Xiao, {Z. Y.}",

year = "2004",

month = jun,

doi = "10.1023/B:JSST.0000039500.48283.5a",

language = "English",

volume = "30",

pages = "157--161",

journal = "Journal of Sol-Gel Science and Technology",

issn = "0928-0707",

publisher = "Springer Netherlands",

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TY - JOUR

T1 - The optical properties of ZnO nanoparticles capped with polyvinyl butyral

AU - Tong, Y. H.

AU - Liu, Y. C.

AU - Lu, S. X.

AU - Dong, L.

AU - Chen, S. J.

AU - Xiao, Z. Y.

PY - 2004/6

Y1 - 2004/6

N2 - ZnO nanoparticles capped with polyvinyl butyral (PVB) have been synthesized by the sol-gel process. Photoluminescence (PL) spectra show a remarkable decrease in visible emission intensity after ZnO nanoparticles are capped with PVB, which indicates that dangling bonds and defect states at the surface of ZnO nanoparticles are markedly passivated. As a result, the process of surface-trapped hole tunneling back into the panicles to form V**0 recombination center is blocked. The PL spectra of thin films show a strong ultraviolet (UV) emission with very weak visible emission. The typical intensity ratio of the UV emission at 3.45 eV to the visible emission at about 2.41 eV is 43.3, which shows an obvious improvement in luminescence properties by the surface passivation with PVB. Low-temperature PL spectra of ZnO powder at 93.8 K are dominated by free exciton, bound exciton and the LO-phonon replica of the bound exciton.

AB - ZnO nanoparticles capped with polyvinyl butyral (PVB) have been synthesized by the sol-gel process. Photoluminescence (PL) spectra show a remarkable decrease in visible emission intensity after ZnO nanoparticles are capped with PVB, which indicates that dangling bonds and defect states at the surface of ZnO nanoparticles are markedly passivated. As a result, the process of surface-trapped hole tunneling back into the panicles to form V**0 recombination center is blocked. The PL spectra of thin films show a strong ultraviolet (UV) emission with very weak visible emission. The typical intensity ratio of the UV emission at 3.45 eV to the visible emission at about 2.41 eV is 43.3, which shows an obvious improvement in luminescence properties by the surface passivation with PVB. Low-temperature PL spectra of ZnO powder at 93.8 K are dominated by free exciton, bound exciton and the LO-phonon replica of the bound exciton.

KW - Nanoparticle

KW - Photoluminescence

KW - Polyvinyl butyral

KW - Surface passivation

KW - Zno

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DO - 10.1023/B:JSST.0000039500.48283.5a

M3 - Article

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SN - 0928-0707

VL - 30

SP - 157

EP - 161

JO - Journal of Sol-Gel Science and Technology

JF - Journal of Sol-Gel Science and Technology

IS - 3

ER -

The optical properties of ZnO nanoparticles capped with polyvinyl butyral

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Keywords

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