Förster resonance energy transfer enhanced color-conversion using colloidal semiconductor quantum dots for solid state lighting
Date
2009-10-15
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Source Title
Applied Physics Letters
Print ISSN
0003-6951
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American Institute of Physics
Volume
95
Issue
15
Pages
151111-1 - 151111-3
Language
English
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Abstract
In this paper, we present Förster resonance energy transfer (FRET)-enhanced color-conversion using colloidal semiconductor quantum dot nanocrystals (NCs) to make reddish-orange light-emitting diodes for use in ultraefficient solid state lighting. To achieve FRET enhancement at 614 nm, we use an energy gradient hybrid structure made of cyan- and orange-emitting CdSe/ZnS NCs (λPL =492 and 588 nm in solution, respectively). This enables recycling of trapped excitons using FRET and achieves a relative quantum efficiency enhancement of 15.1% in reddish-orange full color-conversion for the integrated hybrid cyan-orange NC layer with respect to the case of full color-conversion using only orange NCs without FRET.
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CdSe/ZnS , Colloidal semiconductors , Energy gradients , Full color , Hybrid structure , Quantum dot , Resonance energy transfer , Solid state lighting , Trapped exciton , Color , Energy transfer , Light emitting diodes , Lighting , Optical waveguides , Resonance , Semiconductor diodes , Semiconductor quantum dots