Large enhancement of light-extraction efficiency from optically pumped, nanorod light-emitting diodes

Mei Ling Kuo; Ya Ju Lee; Thomas C. Shen; Shawn Yu Lin

doi:10.1364/OL.34.002078

Large enhancement of light-extraction efficiency from optically pumped, nanorod light-emitting diodes

Mei Ling Kuo, Ya Ju Lee, Thomas C. Shen, Shawn Yu Lin^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

19 Citations (Scopus)

Abstract

We report a threefold enhancement of light-emission intensity at λ=460nm and a 16-fold extractionefficiency enhancement measured from a 2D array of nanorod LEDs. The nano-LEDs are randomly arranged and have a typical rod diameter of 100-250 nm. From a combination of photoluminescence, reflectance, and excitation power-dependence measurements, we show that the enhanced emission is due mainly to modification of the extraction efficiency, and not to that of the internal efficiency. Furthermore, we show that the extraction enhancement originates from the randomness of the 2D array that scatters light efficiently into the air and the smallness of the nanorods that eliminates the guiding modes that trap light.

Original language	English
Pages (from-to)	2078-2080
Number of pages	3
Journal	Optics Letters
Volume	34
Issue number	13
DOIs	https://doi.org/10.1364/OL.34.002078
Publication status	Published - 2009 Jul 1
Externally published	Yes

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics

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title = "Large enhancement of light-extraction efficiency from optically pumped, nanorod light-emitting diodes",

abstract = "We report a threefold enhancement of light-emission intensity at λ=460nm and a 16-fold extractionefficiency enhancement measured from a 2D array of nanorod LEDs. The nano-LEDs are randomly arranged and have a typical rod diameter of 100-250 nm. From a combination of photoluminescence, reflectance, and excitation power-dependence measurements, we show that the enhanced emission is due mainly to modification of the extraction efficiency, and not to that of the internal efficiency. Furthermore, we show that the extraction enhancement originates from the randomness of the 2D array that scatters light efficiently into the air and the smallness of the nanorods that eliminates the guiding modes that trap light.",

author = "Kuo, {Mei Ling} and Lee, {Ya Ju} and Shen, {Thomas C.} and Lin, {Shawn Yu}",

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AU - Lee, Ya Ju

AU - Shen, Thomas C.

AU - Lin, Shawn Yu

PY - 2009/7/1

Y1 - 2009/7/1

N2 - We report a threefold enhancement of light-emission intensity at λ=460nm and a 16-fold extractionefficiency enhancement measured from a 2D array of nanorod LEDs. The nano-LEDs are randomly arranged and have a typical rod diameter of 100-250 nm. From a combination of photoluminescence, reflectance, and excitation power-dependence measurements, we show that the enhanced emission is due mainly to modification of the extraction efficiency, and not to that of the internal efficiency. Furthermore, we show that the extraction enhancement originates from the randomness of the 2D array that scatters light efficiently into the air and the smallness of the nanorods that eliminates the guiding modes that trap light.

AB - We report a threefold enhancement of light-emission intensity at λ=460nm and a 16-fold extractionefficiency enhancement measured from a 2D array of nanorod LEDs. The nano-LEDs are randomly arranged and have a typical rod diameter of 100-250 nm. From a combination of photoluminescence, reflectance, and excitation power-dependence measurements, we show that the enhanced emission is due mainly to modification of the extraction efficiency, and not to that of the internal efficiency. Furthermore, we show that the extraction enhancement originates from the randomness of the 2D array that scatters light efficiently into the air and the smallness of the nanorods that eliminates the guiding modes that trap light.

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Large enhancement of light-extraction efficiency from optically pumped, nanorod light-emitting diodes

Abstract

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