Determining phosphors' effective quantum efficiency for remote phosphor type of LED modules

Published

December 1, 2010

Author(s)

Arno Keppens, Yuqin Zong, Yoshi Ohno, Geert Deconinck, P. Hanselaer

Abstract

Without any doubt remote phosphor type of light-emitting diodes (LEDs) are gaining popularity in all kinds of solid-state lighting applications. Main reasons are the high luminous efficiency in comparison with proximate phosphor type of LED devices and the improved spatial color uniformity due to internal photon scattering. Optical properties of a high-power white LED are highly dependent on the power and the temperature of the diode junction and phosphor. For a remote phosphor type of LED module, junction and phosphor temperature can be very different. The effect of excitation light density, junction temperature, and ambient temperature on phosphor heating has therefore been studied. Results have been used to determine the effective quantum efficiency of remote phosphors as a function of phosphor temperature and pump light density.

Volume

CIE x036:2010

Conference Dates

August 30-31, 2010

Conference Location

Bern, CH

Conference Title

CIE Tutorial and Expert Symposium on Spectral and Imaging Methods for Photometry and Radiometry

Pub Type

Conferences

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Keywords

effective quantum efficiency, light-emitting diode, phosphor temperature, remote phosphor

Citation

Keppens, A. , Zong, Y. , Ohno, Y. , Deconinck, G. and Hanselaer, P. (2010), Determining phosphors’ effective quantum efficiency for remote phosphor type of LED modules, CIE Tutorial and Expert Symposium on Spectral and Imaging Methods for Photometry and Radiometry, Bern, CH, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=907063 (Accessed December 14, 2024)