The phosphor’s optical properties—chromaticity coordinate relationship of phosphor converted white LEDs

Based on optical ray-tracing simulations we discuss the effect of the extinction coefficient and the quantum efficiency of the phosphors on the angular homogeneity of the white light emitted from phosphor converted light-emitting diodes. In particular variations of the extinction coefficient are pro...

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Bibliographic Details
Published inOptical and quantum electronics Vol. 44; no. 3-5; pp. 111 - 117
Main Authors Sommer, C., Hartmann, P., Pachler, P., Hoschopf, H., Wenzl, F. P.
Format Journal Article
LanguageEnglish
Published Boston Springer US 01.06.2012
Subjects
Characterization and Evaluation of Materials
Chromaticity
Coefficients
Computer Communication Networks
Electrical Engineering
Extinction
Homogeneity
Lasers
Optical Devices
Optical properties
Optics
Phosphors
Photonics
Physics
Physics and Astronomy
Quantum efficiency
White light
Ray tracing
Solid state lighting
Colour conversion
Optical simulation
White LEDs
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Summary:Based on optical ray-tracing simulations we discuss the effect of the extinction coefficient and the quantum efficiency of the phosphors on the angular homogeneity of the white light emitted from phosphor converted light-emitting diodes. In particular variations of the extinction coefficient are prone to affect diverse CIE chromaticity coordinates for different viewing angles. Contrarily, the impact of the quantum efficiency on angle dependent variations of the chromaticity coordinates turns out to be of minor importance.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0306-8919
1572-817X
DOI:10.1007/s11082-011-9528-x