Structural tuning of color chromaticity through nonradiative energy transfer by interspacing CdTe nanocrystal monolayers
Author(s)
Date
2009-02-09Source Title
Applied Physics Letters
Print ISSN
0003-6951
Publisher
American Institute of Physics
Volume
94
Issue
6
Pages
061105-1 - 061105-3
Language
English
Type
ArticleItem Usage Stats
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Abstract
We proposed and demonstrated architectural tuning of color chromaticity by controlling photoluminescence decay kinetics through nonradiative Forster resonance energy transfer in the heterostructure of layer-by-layer spaced CdTe nanocrystal (NC) solids. We achieved highly sensitive tuning by precisely adjusting the energy transfer efficiency from donor NCs to acceptor NCs via controlling interspacing between them at the nanoscale. By modifying decay lifetimes of donors from 12.05 to 2.96 ns and acceptors from 3.68 to 14.57 ns, we fine-tuned chromaticity coordinates from (x,y)=(0.575,0.424) to (0.632, 0.367). This structural adjustment enabled a postsynthesis color tuning capability, alternative or additive to using the size, shape, and composition of NCs.
Keywords
Cadmium compoundsColour
Ii-vi semiconductors
Nanostructured materials
Optical tuning
Photoluminescence