GB/T 39492-2020: Testing method of quantum efficiency for white LED phosphor

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Scope

This Standard specifies the method principles, instruments and devices, test procedures, test
result expression, precision and test report requirements for the quantum efficiency of
phosphors used for white LEDs.
This Standard is applicable to the testing of the external quantum efficiency and internal
quantum efficiency of white LED phosphor emitting in the band range of 400 nm ~ 780 nm
when the LED chip is excited with a peak wavelength of 400 nm ~ 480 nm. The determination
range of external quantum efficiency is 0.6 ~ 0.9, and the determination range of internal
quantum efficiency is greater than 0.9.

Basic Data

Standard ID	GB/T 39492-2020 (GB/T39492-2020)
Description (Translated English)	Testing method of quantum efficiency for white LED phosphor
Sector / Industry	National Standard (Recommended)
Classification of Chinese Standard	H14
Word Count Estimation	6,656
Date of Issue	2020-11-19
Date of Implementation	2021-10-01
Regulation (derived from)	National Standard Announcement No. 26 of 2020
Issuing agency(ies)	State Administration for Market Regulation, China National Standardization Administration