Impact of extinction coefficient of phosphor on thermal load of color conversion elements of phosphor converted LEDs

Besides their direct impact on the respective correlated color temperature, the extinction coefficient and the quantum effi- ciency of the phosphor also have tremendous impact on the thermal load of the color conversion elements of phosphor converted LEDs under operation. Because of the low thermal...

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Bibliographic Details
Published in:Journal of rare earths 2014-03, Vol.32 (3), p.201-206
Main Authors: Wenzl, F.P., Fulmek, P., Sommer, C., Schweitzer, S., Nemitz, W., Hartmann, P., Pachler, P., Hoschopf, H., Schrank, F., Langer, G., Nicolics, J.
Format: Article
Language:English
Subjects:
Coefficients
Color
color conversion
Color temperature
Conversion
Extinction
light-emitting diode
phosphor
Phosphors
Rare earth metals
rare earths
Silicones
发光二极管
消光系数
热负荷
相关色温
荧光体
转换元件
量子效率
颜色
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Summary:Besides their direct impact on the respective correlated color temperature, the extinction coefficient and the quantum effi- ciency of the phosphor also have tremendous impact on the thermal load of the color conversion elements of phosphor converted LEDs under operation. Because of the low thermal conductivity of the silicone matrix in which the phosphor particles are typically embedded, the by far highest temperatures within the LED assembly are reached within the color conversion element. Based on a combined optical and thermal simulation procedure we show that in particular a larger value for the extinction coefficient might have a beneficial impact on the resulting thermal load.
ISSN:1002-0721
2509-4963
DOI:10.1016/S1002-0721(14)60052-1