IEC 60747-5-9:2019 

Semiconductor devices - Part 5-9: Optoelectronic devices - Light emitting diodes - Test method of the internal quantum efficiency based on the temperature-dependent electroluminescence


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IEC 60747-5-9:2019(E) specifies the measuring method of the internal quantum efficiency (IQE) of single light emitting diode (LED) chips or packages without phosphor. White LEDs for lighting applications are out of the scope of this document. This document utilizes the relative external quantum efficiencies (EQEs) measured at cryogenic temperatures and at an operating temperature, which is called temperature-dependent electroluminescence (TDEL). In order to identify the reference IQE of 100 %, the maximum values of the peak EQE are found by varying the environmental temperature and current.

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Additional information

Publication typeInternational Standard
Publication date2019-12-11
Available language(s)English
TC/SCTC 47/SC 47E - Discrete semiconductor devicesrss
ICS31.080.99 - Other semiconductor devices
Stability date  2025
File size2062 KB

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