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

Research output: Contribution to journalArticlepeer-review

476 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 languageEnglish
Pages (from-to)208-211
Number of pages4
JournalChemical Physics Letters
Volume409
Issue number4-6
DOIs
Publication statusPublished - 2005 Jun 30

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy
  • Physical and Theoretical Chemistry

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