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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 18 — Sep. 1, 2008
  • pp: 13961–13968

Resonant nonradiative energy transfer in CdSe/ZnS core/shell nanocrystal solids enhances hybrid white light emitting diodes

Sedat Nizamoglu and Hilmi Volkan Demir  »View Author Affiliations

Optics Express, Vol. 16, Issue 18, pp. 13961-13968 (2008)

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We propose and demonstrate hybrid white light emitting diodes enhanced with resonant nonradiative energy transfer in CdSe/ZnS core/shell nanocrystal solids integrated on near-UV InGaN/GaN LEDs. We observe a relative quantum efficiency enhancement of 13.2 percent for the acceptor nanocrystals in the energy gradient mixed assembly, compared to the monodisperse phase. This enhancement is attributed to the ability to recycle trapped excitons into nanocrystals using nonradiative energy transfer. We present the time-resolved photoluminescence of these nanocrystal solids to reveal the kinetics of their energy transfer and their steady-state photoluminescence to exhibit the resulting quantum efficiency enhancement.

© 2008 Optical Society of America

OCIS Codes
(160.2540) Materials : Fluorescent and luminescent materials
(250.0250) Optoelectronics : Optoelectronics
(250.5230) Optoelectronics : Photoluminescence

ToC Category:

Original Manuscript: June 12, 2008
Revised Manuscript: August 10, 2008
Manuscript Accepted: August 21, 2008
Published: August 25, 2008

Sedat Nizamoglu and Hilmi V. Demir, "Resonant nonradiative energy transfer in CdSe/ZnS core/shell nanocrystal solids enhances hybrid white light emitting diodes," Opt. Express 16, 13961-13968 (2008)

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Fig. 1. Fig. 2. Fig. 3.

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