LED based reference for wavelength and relative intensity

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  • VTT MIKES Metrology

Abstract

Relative emission spectra of LEDs depend on the junction temperature. The high-energy region of the emission spectrum can be modelled with the joint density of states and the Maxwell-Boltzmann distribution as a function of energy and junction temperature. It can be shown that the normalized emission spectra at different junction temperatures intersect at a unique energy value. Thus the wavelength and the relative intensity of the intersection point do not depend on the junction temperature of the LED. The invariant intersection energy exists for all LEDs manufactured using the elements from groups III-V. The wavelength determined by the intersection energy can be used as a temperature invariant wavelength and relative intensity reference in spectral measurements.

Details

Original languageEnglish
Article number012010
Number of pages5
JournalJournal of Physics: Conference Series
Volume972
Issue number1
Publication statusPublished - 2 Mar 2018
MoE publication typeA4 Article in a conference publication
EventInternational Conference on New Developments and Applications in Optical Radiometry - Tokyo, Japan
Duration: 13 Jun 201716 Jun 2017
Conference number: 13

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