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

199 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 1 2006

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ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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