Band gap variation of size-controlled ZnO quantum dots synthesized by sol-gel method

Kuo Feng Lin; Hsin Ming Cheng; Hsu Cheng Hsu; Li Jiaun Lin; Wen Feng Hsieh

doi:10.1016/j.cplett.2005.05.027

Band gap variation of size-controlled ZnO quantum dots synthesized by sol-gel method

Kuo Feng Lin, Hsin Ming Cheng, Hsu Cheng Hsu, Li Jiaun Lin, Wen Feng Hsieh

Department of Photonics

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

493 Citations (Scopus)

Abstract

ZnO quantum dots were synthesized successfully via a simple sol-gel method. The average size of quantum dots can be tailored using well-controlled concentration of zinc precursor. Size-dependent blue shifts of photoluminescence and absorption spectra revealed the quantum confinement effect. The band gap enlargement is in agreement with the theoretical calculation based on the effective mass model. Furthermore, as the particle size decreases, we observed an increase in the size-dependent Stokes shift of the photoluminescence peak relative to the absorption onset.

Original language	English
Pages (from-to)	208-211
Number of pages	4
Journal	Chemical Physics Letters
Volume	409
Issue number	4-6
DOIs	https://doi.org/10.1016/j.cplett.2005.05.027
Publication status	Published - 2005 Jun 30

All Science Journal Classification (ASJC) codes

General Physics and Astronomy
Physical and Theoretical Chemistry

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10.1016/j.cplett.2005.05.027

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title = "Band gap variation of size-controlled ZnO quantum dots synthesized by sol-gel method",

abstract = "ZnO quantum dots were synthesized successfully via a simple sol-gel method. The average size of quantum dots can be tailored using well-controlled concentration of zinc precursor. Size-dependent blue shifts of photoluminescence and absorption spectra revealed the quantum confinement effect. The band gap enlargement is in agreement with the theoretical calculation based on the effective mass model. Furthermore, as the particle size decreases, we observed an increase in the size-dependent Stokes shift of the photoluminescence peak relative to the absorption onset.",

author = "Lin, {Kuo Feng} and Cheng, {Hsin Ming} and Hsu, {Hsu Cheng} and Lin, {Li Jiaun} and Hsieh, {Wen Feng}",

note = "Funding Information: Authors gratefully acknowledge financial support from the National Science Council (NSC) in Taiwan under Contract No. NSC-93-2112-M-009-035. We also thank the Nano Technology Research Center and Energy & Resources Laboratories of ITRI for facilitates support and S.Y. Lai (TEM group of MRL/ITRI) for great help on electron microscopy measurements.",

year = "2005",

month = jun,

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doi = "10.1016/j.cplett.2005.05.027",

language = "English",

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journal = "Chemical Physics Letters",

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AU - Lin, Kuo Feng

AU - Cheng, Hsin Ming

AU - Hsu, Hsu Cheng

AU - Lin, Li Jiaun

AU - Hsieh, Wen Feng

N1 - Funding Information: Authors gratefully acknowledge financial support from the National Science Council (NSC) in Taiwan under Contract No. NSC-93-2112-M-009-035. We also thank the Nano Technology Research Center and Energy & Resources Laboratories of ITRI for facilitates support and S.Y. Lai (TEM group of MRL/ITRI) for great help on electron microscopy measurements.

PY - 2005/6/30

Y1 - 2005/6/30

N2 - ZnO quantum dots were synthesized successfully via a simple sol-gel method. The average size of quantum dots can be tailored using well-controlled concentration of zinc precursor. Size-dependent blue shifts of photoluminescence and absorption spectra revealed the quantum confinement effect. The band gap enlargement is in agreement with the theoretical calculation based on the effective mass model. Furthermore, as the particle size decreases, we observed an increase in the size-dependent Stokes shift of the photoluminescence peak relative to the absorption onset.

AB - ZnO quantum dots were synthesized successfully via a simple sol-gel method. The average size of quantum dots can be tailored using well-controlled concentration of zinc precursor. Size-dependent blue shifts of photoluminescence and absorption spectra revealed the quantum confinement effect. The band gap enlargement is in agreement with the theoretical calculation based on the effective mass model. Furthermore, as the particle size decreases, we observed an increase in the size-dependent Stokes shift of the photoluminescence peak relative to the absorption onset.

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Band gap variation of size-controlled ZnO quantum dots synthesized by sol-gel method

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