Nanocrystal-based light-emitting diodes utilizing high-efficiency nonradiative energy transfer for color conversion

Marc Achermann, Melissa A. Petruska, Daniel D. Koleske, Mary H. Crawford, Victor I Klimov

Research output: Contribution to journalArticle

196 Citations (Scopus)

Abstract

We report a practical implementation of high-efficiency color conversion in an electrically pumped light-emitting diode (LED) using nonradiative energy transfer. On the basis of a new LED design that offers both strong energy-transfer coupling and efficient carrier injection, we show that a hybrid structure comprising a single monolayer of CdSe nanocrystals assembled on top of an InGaN/GaN quantum well provides nearly 10% color conversion efficiency. This value is significantly higher than that for a traditional absorption-re- emission color-conversion scheme in a similar device structure. Furthermore, these hybrid devices can also provide improved efficiencies, compared not only to phosphor-based structures but also to stand-alone LEDs.

Original languageEnglish
Pages (from-to)1396-1400
Number of pages5
JournalNano Letters
Volume6
Issue number7
DOIs
Publication statusPublished - Jul 2006

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Energy transfer
Nanocrystals
Light emitting diodes
nanocrystals
light emitting diodes
energy transfer
Color
color
hybrid structures
carrier injection
Phosphors
Semiconductor quantum wells
Conversion efficiency
phosphors
Monolayers
quantum wells

ASJC Scopus subject areas

  • Materials Science(all)
  • Electronic, Optical and Magnetic Materials
  • Chemistry (miscellaneous)

Cite this

Nanocrystal-based light-emitting diodes utilizing high-efficiency nonradiative energy transfer for color conversion. / Achermann, Marc; Petruska, Melissa A.; Koleske, Daniel D.; Crawford, Mary H.; Klimov, Victor I.

In: Nano Letters, Vol. 6, No. 7, 07.2006, p. 1396-1400.

Research output: Contribution to journalArticle

Achermann, Marc ; Petruska, Melissa A. ; Koleske, Daniel D. ; Crawford, Mary H. ; Klimov, Victor I. / Nanocrystal-based light-emitting diodes utilizing high-efficiency nonradiative energy transfer for color conversion. In: Nano Letters. 2006 ; Vol. 6, No. 7. pp. 1396-1400.
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