Nano Archive

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

Achermann, Marc and Petruska, Melissa A. and Koleske, Daniel D. and Crawford, Mary H. and Klimov, Victor I. (2006) Nanocrystal-based light-emitting diodes utilizing high-efficiency nonradiative energy transfer for color conversion. NANO LETTERS, 6 (7). pp. 1396-1400.

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Official URL: http://dx.doi.org/10.1021/nl060392t

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.

Item Type:Article
Subjects:Physical Science > Nano objects
Physical Science > Nanoelectronics
ID Code:3769
Deposited By:SPI
Deposited On:26 Jan 2009 09:55
Last Modified:26 Jan 2009 09:55

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