LED based reference for wavelength and relative intensity

Hans Baumgartner, Kasperi Kylmänen, Olli Kantamaa, Petri Kärhä, Erkki Ikonen

    Research output: Contribution to journalArticle in a proceedings journalScientificpeer-review

    1 Citation (Scopus)


    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.

    Original languageEnglish
    Article number012010
    JournalJournal of Physics: Conference Series
    Issue number1
    Publication statusPublished - 2 Mar 2018
    MoE publication typeA4 Article in a conference publication
    Event13th International Conference on New Developments and Applications in Optical Radiometry, NEWRAD 2017 - Tokyo, Japan
    Duration: 13 Jun 201716 Jun 2017


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