Directional light extraction from thin-film resonant cavity light-emitting diodes with a photonic crystal

K. Bergenek; Ch. Wiesmann; H. Zull; R. Wirth; P. Sundgren; N. Linder; K. Streubel; Thomas Fraser Krauss

doi:10.1063/1.3046130

Directional light extraction from thin-film resonant cavity light-emitting diodes with a photonic crystal

K. Bergenek, Ch. Wiesmann, H. Zull, R. Wirth, P. Sundgren, N. Linder, K. Streubel, Thomas Fraser Krauss

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

Abstract

We report directional light extraction from AlGaInP thin-film resonant cavity light emitting diodes (RCLEDs) with shallow photonic crystals (PhCs). Diffraction of guided modes into the light extraction cone enhances the light extraction by a factor of 2.6 compared to unstructured RCLEDs, where the farfields still show higher directionality than Lambertian emitters. The external quantum efficiency is 15.5% to air and 26% with encapsulation, respectively. The PhC-RCLEDs are also more stable to a temperature induced wavelength shift than unstructured RCLEDs.

Original language	English
Number of pages	3
Journal	Applied Physics Letters
Volume	93
Issue number	23
DOIs	https://doi.org/10.1063/1.3046130
Publication status	Published - 8 Dec 2008

Keywords

aluminium compounds
gallium compounds
III-V semiconductors
indium compounds
light emitting diodes
photonic crystals
thin film devices
EXTERNAL QUANTUM EFFICIENCY
SPONTANEOUS EMISSION
650 NM
IMPACT
LEDS

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10.1063/1.3046130

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title = "Directional light extraction from thin-film resonant cavity light-emitting diodes with a photonic crystal",

abstract = "We report directional light extraction from AlGaInP thin-film resonant cavity light emitting diodes (RCLEDs) with shallow photonic crystals (PhCs). Diffraction of guided modes into the light extraction cone enhances the light extraction by a factor of 2.6 compared to unstructured RCLEDs, where the farfields still show higher directionality than Lambertian emitters. The external quantum efficiency is 15.5% to air and 26% with encapsulation, respectively. The PhC-RCLEDs are also more stable to a temperature induced wavelength shift than unstructured RCLEDs.",

keywords = "aluminium compounds, gallium compounds, III-V semiconductors, indium compounds, light emitting diodes, photonic crystals, thin film devices, EXTERNAL QUANTUM EFFICIENCY, SPONTANEOUS EMISSION, 650 NM, IMPACT, LEDS",

author = "K. Bergenek and Ch. Wiesmann and H. Zull and R. Wirth and P. Sundgren and N. Linder and K. Streubel and Krauss, {Thomas Fraser}",

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doi = "10.1063/1.3046130",

language = "English",

volume = "93",

journal = "Applied Physics Letters",

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publisher = "American Institute of Physics",

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TY - JOUR

T1 - Directional light extraction from thin-film resonant cavity light-emitting diodes with a photonic crystal

AU - Bergenek, K.

AU - Wiesmann, Ch.

AU - Zull, H.

AU - Wirth, R.

AU - Sundgren, P.

AU - Linder, N.

AU - Streubel, K.

AU - Krauss, Thomas Fraser

PY - 2008/12/8

Y1 - 2008/12/8

N2 - We report directional light extraction from AlGaInP thin-film resonant cavity light emitting diodes (RCLEDs) with shallow photonic crystals (PhCs). Diffraction of guided modes into the light extraction cone enhances the light extraction by a factor of 2.6 compared to unstructured RCLEDs, where the farfields still show higher directionality than Lambertian emitters. The external quantum efficiency is 15.5% to air and 26% with encapsulation, respectively. The PhC-RCLEDs are also more stable to a temperature induced wavelength shift than unstructured RCLEDs.

AB - We report directional light extraction from AlGaInP thin-film resonant cavity light emitting diodes (RCLEDs) with shallow photonic crystals (PhCs). Diffraction of guided modes into the light extraction cone enhances the light extraction by a factor of 2.6 compared to unstructured RCLEDs, where the farfields still show higher directionality than Lambertian emitters. The external quantum efficiency is 15.5% to air and 26% with encapsulation, respectively. The PhC-RCLEDs are also more stable to a temperature induced wavelength shift than unstructured RCLEDs.

KW - aluminium compounds

KW - gallium compounds

KW - III-V semiconductors

KW - indium compounds

KW - light emitting diodes

KW - photonic crystals

KW - thin film devices

KW - EXTERNAL QUANTUM EFFICIENCY

KW - SPONTANEOUS EMISSION

KW - 650 NM

KW - IMPACT

KW - LEDS

UR - http://www.scopus.com/inward/record.url?scp=57649126093&partnerID=8YFLogxK

U2 - 10.1063/1.3046130

DO - 10.1063/1.3046130

M3 - Article

SN - 0003-6951

VL - 93

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 23

ER -

Directional light extraction from thin-film resonant cavity light-emitting diodes with a photonic crystal

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