Improving optical properties of white LED fabricated by a blue LED chip with yellow/red phosphors

C. C. Lin; Y. S. Zheng; H. Y. Chen; C. H. Ruan; G. W. Xiao; R. S. Liu

doi:10.1149/1.3465654

Improving optical properties of white LED fabricated by a blue LED chip with yellow/red phosphors

C. C. Lin
, Y. S. Zheng
, H. Y. Chen
, C. H. Ruan
, G. W. Xiao
, R. S. Liu

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

94 Citations (Scopus)

Abstract

White light-emitting diodes (LEDs) were fabricated by associating an InGaN-based blue LED chip with highly luminescent phosphors, Y₃A _l5O₁₂:Ce³⁺ (YAG:Ce) and CaSiAlN₃: Eu²⁺. The thermal stability of these phosphors, depending weakly on the composition and the activator concentration, remains high over a wide range of temperatures (25-300°C). When a mixture of YAG:Ce and CaSiAlN ₃: Eu²⁺ was coated on a blue LED, the resultant white LED had a high luminous efficiency of ν_L = 68 lm/W, a high color rendering index of Ra = 93, and a color temperature of T_C = 3007 K (at 50 mA). Additionally, the color coordinates, Ra and T_C, of the white LED tend to remain constant against an appreciable variation in applied current.

Original language	English
Pages (from-to)	H900-H903
Journal	Journal of the Electrochemical Society
Volume	157
Issue number	9
DOIs	https://doi.org/10.1149/1.3465654
Publication status	Published - Aug 26 2010
Externally published	Yes

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Renewable Energy, Sustainability and the Environment
Condensed Matter Physics
Surfaces, Coatings and Films
Electrochemistry
Materials Chemistry

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10.1149/1.3465654

Cite this

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title = "Improving optical properties of white LED fabricated by a blue LED chip with yellow/red phosphors",

abstract = "White light-emitting diodes (LEDs) were fabricated by associating an InGaN-based blue LED chip with highly luminescent phosphors, Y3A l5O12:Ce3+ (YAG:Ce) and CaSiAlN3: Eu2+. The thermal stability of these phosphors, depending weakly on the composition and the activator concentration, remains high over a wide range of temperatures (25-300°C). When a mixture of YAG:Ce and CaSiAlN 3: Eu2+ was coated on a blue LED, the resultant white LED had a high luminous efficiency of νL = 68 lm/W, a high color rendering index of Ra = 93, and a color temperature of TC = 3007 K (at 50 mA). Additionally, the color coordinates, Ra and TC, of the white LED tend to remain constant against an appreciable variation in applied current.",

author = "Lin, \{C. C.\} and Zheng, \{Y. S.\} and Chen, \{H. Y.\} and Ruan, \{C. H.\} and Xiao, \{G. W.\} and Liu, \{R. S.\}",

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doi = "10.1149/1.3465654",

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T1 - Improving optical properties of white LED fabricated by a blue LED chip with yellow/red phosphors

AU - Lin, C. C.

AU - Zheng, Y. S.

AU - Chen, H. Y.

AU - Ruan, C. H.

AU - Xiao, G. W.

AU - Liu, R. S.

PY - 2010/8/26

Y1 - 2010/8/26

N2 - White light-emitting diodes (LEDs) were fabricated by associating an InGaN-based blue LED chip with highly luminescent phosphors, Y3A l5O12:Ce3+ (YAG:Ce) and CaSiAlN3: Eu2+. The thermal stability of these phosphors, depending weakly on the composition and the activator concentration, remains high over a wide range of temperatures (25-300°C). When a mixture of YAG:Ce and CaSiAlN 3: Eu2+ was coated on a blue LED, the resultant white LED had a high luminous efficiency of νL = 68 lm/W, a high color rendering index of Ra = 93, and a color temperature of TC = 3007 K (at 50 mA). Additionally, the color coordinates, Ra and TC, of the white LED tend to remain constant against an appreciable variation in applied current.

AB - White light-emitting diodes (LEDs) were fabricated by associating an InGaN-based blue LED chip with highly luminescent phosphors, Y3A l5O12:Ce3+ (YAG:Ce) and CaSiAlN3: Eu2+. The thermal stability of these phosphors, depending weakly on the composition and the activator concentration, remains high over a wide range of temperatures (25-300°C). When a mixture of YAG:Ce and CaSiAlN 3: Eu2+ was coated on a blue LED, the resultant white LED had a high luminous efficiency of νL = 68 lm/W, a high color rendering index of Ra = 93, and a color temperature of TC = 3007 K (at 50 mA). Additionally, the color coordinates, Ra and TC, of the white LED tend to remain constant against an appreciable variation in applied current.

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Improving optical properties of white LED fabricated by a blue LED chip with yellow/red phosphors

Abstract

ASJC Scopus subject areas

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