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Generating tunable white light by resonance energy transfer in transparent dye-conjugated metal oxide nanocrystals.

Authors
  • Wang, Ting1
  • Chirmanov, Vadim
  • Chiu, Wan Hang M
  • Radovanovic, Pavle V
  • 1 Department of Chemistry, University of Waterloo , 200 University Avenue West, Waterloo, Ontario N2L 3G1, Canada. , (Canada)
Type
Published Article
Journal
Journal of the American Chemical Society
Publisher
American Chemical Society
Publication Date
Oct 02, 2013
Volume
135
Issue
39
Pages
14520–14523
Identifiers
DOI: 10.1021/ja407013z
PMID: 24047053
Source
Medline
License
Unknown

Abstract

We report the design and properties of hybrid white-light-emitting nanophosphors obtained by electronic coupling of defect states in colloidal Ga2O3 nanocrystals emitting in blue-green with selected organic molecules emitting in orange-red. Coupling between the two components is enabled by the nanocrystal's size-dependent resonance energy transfer, allowing the photoluminescence chromaticity to be precisely tuned by changing the nanocrystal size and selecting the complementary organic dye molecule. Using this approach, we demonstrate the generation of pure white light with quantum yield of ~30%, color rendering index up to 95, and color temperature of 5500 K. These results provide a guideline for the design of a new class of hybrid white-light-emitting nanophosphors and other multifunctional nanostructures based on transparent metal oxides.

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