Light extraction enhancement of GaN-based LEDs through passive/active photon recycling

Ching Cherng Sun; Tsung Xian Lee; Yi Chien Lo; Cheng Chien Chen; Shang Yu Tsai

doi:10.1016/j.optcom.2011.06.051

Light extraction enhancement of GaN-based LEDs through passive/active photon recycling

Ching Cherng Sun, Tsung Xian Lee, Yi Chien Lo, Cheng Chien Chen, Shang Yu Tsai

Department of Optics and Photonics

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

27 Scopus citations

Abstract

In this paper, we present a study of light extraction of GaN-based LEDs through active/passive photon recycling, including sapphire-based and Thin-GaN based on Monte Carlo ray tracing. The mechanisms in enhancing light extraction incorporated with implanting micro pyramid (lens) array and lens encapsulation of both cavity photon recycling and quantum photon recycling are discussed. For an absorption coefficient of 200 cm^{- 1} in the active layer, both approaches perform more than 90% of light extraction efficiency through cavity photon recycling. For a heavy absorbed active layer, the quantum photon recycling could play an important role in light extraction.

Original language	English
Pages (from-to)	4862-4868
Number of pages	7
Journal	Optics Communications
Volume	284
Issue number	20
DOIs	https://doi.org/10.1016/j.optcom.2011.06.051
State	Published - 15 Sep 2011

Keywords

GaN
Light emitting diode
Light extraction
Photon recycle

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10.1016/j.optcom.2011.06.051

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title = "Light extraction enhancement of GaN-based LEDs through passive/active photon recycling",

abstract = "In this paper, we present a study of light extraction of GaN-based LEDs through active/passive photon recycling, including sapphire-based and Thin-GaN based on Monte Carlo ray tracing. The mechanisms in enhancing light extraction incorporated with implanting micro pyramid (lens) array and lens encapsulation of both cavity photon recycling and quantum photon recycling are discussed. For an absorption coefficient of 200 cm- 1 in the active layer, both approaches perform more than 90% of light extraction efficiency through cavity photon recycling. For a heavy absorbed active layer, the quantum photon recycling could play an important role in light extraction.",

keywords = "GaN, Light emitting diode, Light extraction, Photon recycle",

author = "Sun, {Ching Cherng} and Lee, {Tsung Xian} and Lo, {Yi Chien} and Chen, {Cheng Chien} and Tsai, {Shang Yu}",

note = "Funding Information: This study is sponsored by the National Science Council of the Republic of China with the contract numbers of 97-2221-E-008-025-MY3 , 99-2623-E-008-002-ET and NSC100-3113-E-008-001 . The authors would like to thank Breault Research Organization for the support of ASAP simulation program.",

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AU - Sun, Ching Cherng

AU - Lee, Tsung Xian

AU - Lo, Yi Chien

AU - Chen, Cheng Chien

AU - Tsai, Shang Yu

N1 - Funding Information: This study is sponsored by the National Science Council of the Republic of China with the contract numbers of 97-2221-E-008-025-MY3 , 99-2623-E-008-002-ET and NSC100-3113-E-008-001 . The authors would like to thank Breault Research Organization for the support of ASAP simulation program.

PY - 2011/9/15

Y1 - 2011/9/15

N2 - In this paper, we present a study of light extraction of GaN-based LEDs through active/passive photon recycling, including sapphire-based and Thin-GaN based on Monte Carlo ray tracing. The mechanisms in enhancing light extraction incorporated with implanting micro pyramid (lens) array and lens encapsulation of both cavity photon recycling and quantum photon recycling are discussed. For an absorption coefficient of 200 cm- 1 in the active layer, both approaches perform more than 90% of light extraction efficiency through cavity photon recycling. For a heavy absorbed active layer, the quantum photon recycling could play an important role in light extraction.

AB - In this paper, we present a study of light extraction of GaN-based LEDs through active/passive photon recycling, including sapphire-based and Thin-GaN based on Monte Carlo ray tracing. The mechanisms in enhancing light extraction incorporated with implanting micro pyramid (lens) array and lens encapsulation of both cavity photon recycling and quantum photon recycling are discussed. For an absorption coefficient of 200 cm- 1 in the active layer, both approaches perform more than 90% of light extraction efficiency through cavity photon recycling. For a heavy absorbed active layer, the quantum photon recycling could play an important role in light extraction.

KW - GaN

KW - Light emitting diode

KW - Light extraction

KW - Photon recycle

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DO - 10.1016/j.optcom.2011.06.051

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SP - 4862

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JO - Optics Communications

JF - Optics Communications

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ER -

Light extraction enhancement of GaN-based LEDs through passive/active photon recycling

Abstract

Keywords

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