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Optical Materials Express

Optical Materials Express

  • Editor: David Hagan
  • Vol. 4, Iss. 3 — Mar. 1, 2014
  • pp: 518–524

Multi-color light emissions from mesoporous silica particles embedded with Ga2O3 nanocrystals

Yanhua Zong, Xiangeng Meng, Koji Fujita, and Katsuhisa Tanaka  »View Author Affiliations

Optical Materials Express, Vol. 4, Issue 3, pp. 518-524 (2014)

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We report on novel light–emitting properties from monodispersed mesoporous silica particles embedded with β–Ga2O3 nanocrystals that were fabricated through a chemical approach followed by thermal annealing in specific atmosphere. The emission spectrum of such nanocomposites consists of several sharp peaks where the dominant one regularly shifts with variation of the excitation wavelength, leading to observation of multiple–color light emissions ranging from blue, green, to white light wavelength regions. We suggest that the donor levels created by oxygen vacancy while multiple acceptor levels induced by gallium vacancy or gallium oxide vacancy account for the emission features of multiple bands.

© 2014 Optical Society of America

OCIS Codes
(160.6000) Materials : Semiconductor materials
(260.3800) Physical optics : Luminescence
(160.4236) Materials : Nanomaterials

ToC Category:
Fluorescent and Luminescent Materials

Original Manuscript: January 10, 2014
Revised Manuscript: February 13, 2014
Manuscript Accepted: February 16, 2014
Published: February 24, 2014

Yanhua Zong, Xiangeng Meng, Koji Fujita, and Katsuhisa Tanaka, "Multi-color light emissions from mesoporous silica particles embedded with Ga2O3 nanocrystals," Opt. Mater. Express 4, 518-524 (2014)

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