Nitride-based cascade near white light-emitting diodes

C. H. Chen; S. J. Chang; Y. K. Su; J. K. Sheu; J. F. Chen; Cheng-Huang Kuo; Y. C. Lin

doi:10.1109/LPT.2002.1012381

Nitride-based cascade near white light-emitting diodes

C. H. Chen^*, S. J. Chang, Y. K. Su, J. K. Sheu, J. F. Chen, Cheng-Huang Kuo, Y. C. Lin

^*Corresponding author for this work

Institute of Lighting and Energy Photonics

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

86 Scopus citations

Abstract

An InGaN-GaN blue light-emitting diode (LED) structure and an InGaN-GaN green LED structure were grown sequentially onto the same sapphire substrate so as to achieve a nitride-based near white LED. In order to avoid thyristor effect, we choose a large 2.1 × 2.1 mm² LED chip size, which was six times larger than that of the normal LED. It was found that we could observe a near white light emission with commission international de l'Eclairage color coordinates x = 0.2 and y = 0.3, when the injection current was lower than 200 mA. It was also found that the output power, luminous efficiency and color temperature of such a cascade near white LED were 4.2 mW, 81 lm/W, and 9000 K, respectively.

Original language	English
Pages (from-to)	908-910
Number of pages	3
Journal	IEEE Photonics Technology Letters
Volume	14
Issue number	7
DOIs	https://doi.org/10.1109/LPT.2002.1012381
State	Published - 1 Jul 2002

Keywords

Cascade
EL
GaN
MQW
PL
White LED

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10.1109/LPT.2002.1012381

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title = "Nitride-based cascade near white light-emitting diodes",

abstract = "An InGaN-GaN blue light-emitting diode (LED) structure and an InGaN-GaN green LED structure were grown sequentially onto the same sapphire substrate so as to achieve a nitride-based near white LED. In order to avoid thyristor effect, we choose a large 2.1 × 2.1 mm2 LED chip size, which was six times larger than that of the normal LED. It was found that we could observe a near white light emission with commission international de l'Eclairage color coordinates x = 0.2 and y = 0.3, when the injection current was lower than 200 mA. It was also found that the output power, luminous efficiency and color temperature of such a cascade near white LED were 4.2 mW, 81 lm/W, and 9000 K, respectively.",

keywords = "Cascade, EL, GaN, MQW, PL, White LED",

author = "Chen, {C. H.} and Chang, {S. J.} and Su, {Y. K.} and Sheu, {J. K.} and Chen, {J. F.} and Cheng-Huang Kuo and Lin, {Y. C.}",

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T1 - Nitride-based cascade near white light-emitting diodes

AU - Chen, C. H.

AU - Chang, S. J.

AU - Su, Y. K.

AU - Sheu, J. K.

AU - Chen, J. F.

AU - Kuo, Cheng-Huang

AU - Lin, Y. C.

PY - 2002/7/1

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N2 - An InGaN-GaN blue light-emitting diode (LED) structure and an InGaN-GaN green LED structure were grown sequentially onto the same sapphire substrate so as to achieve a nitride-based near white LED. In order to avoid thyristor effect, we choose a large 2.1 × 2.1 mm2 LED chip size, which was six times larger than that of the normal LED. It was found that we could observe a near white light emission with commission international de l'Eclairage color coordinates x = 0.2 and y = 0.3, when the injection current was lower than 200 mA. It was also found that the output power, luminous efficiency and color temperature of such a cascade near white LED were 4.2 mW, 81 lm/W, and 9000 K, respectively.

AB - An InGaN-GaN blue light-emitting diode (LED) structure and an InGaN-GaN green LED structure were grown sequentially onto the same sapphire substrate so as to achieve a nitride-based near white LED. In order to avoid thyristor effect, we choose a large 2.1 × 2.1 mm2 LED chip size, which was six times larger than that of the normal LED. It was found that we could observe a near white light emission with commission international de l'Eclairage color coordinates x = 0.2 and y = 0.3, when the injection current was lower than 200 mA. It was also found that the output power, luminous efficiency and color temperature of such a cascade near white LED were 4.2 mW, 81 lm/W, and 9000 K, respectively.

KW - Cascade

KW - EL

KW - GaN

KW - MQW

KW - PL

KW - White LED

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