Quantum efficiency measurement of luminescence glasses for high-power white LED was investigated. Luminescence glasses have transparent and anisotropic characteristics, for this reason, we adopted an integrating sphere with 20cm diameter which was connected to a CCD spectrometer to obtain fluorescence spectra of the sample. The relative spectral intensity distribution of the sample under the light source excited was derived from the measured spectra firstly, then using the standard halogen lamp to calibrate the system, we got the absolute spectral intensity distribution, finally the quantum efficiency of the sample can be calculated based on the distribution. It provides an accurate method to measure the luminescence materials’ emission characters.

Date Published: 27 November 2012
PDF: 8 pages
Proc. SPIE 8560, LED and Display Technologies II, 85600O (27 November 2012); doi: 10.1117/12.999745

Published in SPIE Proceedings Vol. 8560:
LED and Display Technologies II
Yanbing Hou; Bin Hu, Editor(s)