Temperature invariant energy value in LED spectra

Hans Baumgartner (Corresponding Author), Anna Vaskuri, Petri Kärhä, Erkki Ikonen

Research output: Contribution to journalArticleScientificpeer-review

5 Citations (Scopus)

Abstract

Relative emission spectra of light-emitting diodes (LEDs) depend on the junction temperature. The high-energy region of the emission spectrum can be modelled with Maxwell-Boltzmann distribution as a function of energy and junction temperature. We show that according to the model and our experiments, the normalized emission spectra at different junction temperatures intersect at a unique energy value. The invariant intersection energy exists for many types of LEDs and can be used to determine the alloy composition of the material. Furthermore, the wavelength determined by the intersection energy can be used as a temperature invariant wavelength reference in spectral measurements.
Original languageEnglish
JournalApplied Physics Letters
Volume109
Issue number23
DOIs
Publication statusPublished - 2016
MoE publication typeA1 Journal article-refereed

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light emitting diodes
emission spectra
intersections
temperature
energy
Boltzmann distribution
wavelengths

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Baumgartner, H., Vaskuri, A., Kärhä, P., & Ikonen, E. (2016). Temperature invariant energy value in LED spectra. Applied Physics Letters, 109(23). https://doi.org/10.1063/1.4971831
Baumgartner, Hans ; Vaskuri, Anna ; Kärhä, Petri ; Ikonen, Erkki. / Temperature invariant energy value in LED spectra. In: Applied Physics Letters. 2016 ; Vol. 109, No. 23.
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Baumgartner, H, Vaskuri, A, Kärhä, P & Ikonen, E 2016, 'Temperature invariant energy value in LED spectra', Applied Physics Letters, vol. 109, no. 23. https://doi.org/10.1063/1.4971831

Temperature invariant energy value in LED spectra. / Baumgartner, Hans (Corresponding Author); Vaskuri, Anna; Kärhä, Petri; Ikonen, Erkki.

In: Applied Physics Letters, Vol. 109, No. 23, 2016.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Temperature invariant energy value in LED spectra

AU - Baumgartner, Hans

AU - Vaskuri, Anna

AU - Kärhä, Petri

AU - Ikonen, Erkki

PY - 2016

Y1 - 2016

N2 - Relative emission spectra of light-emitting diodes (LEDs) depend on the junction temperature. The high-energy region of the emission spectrum can be modelled with Maxwell-Boltzmann distribution as a function of energy and junction temperature. We show that according to the model and our experiments, the normalized emission spectra at different junction temperatures intersect at a unique energy value. The invariant intersection energy exists for many types of LEDs and can be used to determine the alloy composition of the material. Furthermore, the wavelength determined by the intersection energy can be used as a temperature invariant wavelength reference in spectral measurements.

AB - Relative emission spectra of light-emitting diodes (LEDs) depend on the junction temperature. The high-energy region of the emission spectrum can be modelled with Maxwell-Boltzmann distribution as a function of energy and junction temperature. We show that according to the model and our experiments, the normalized emission spectra at different junction temperatures intersect at a unique energy value. The invariant intersection energy exists for many types of LEDs and can be used to determine the alloy composition of the material. Furthermore, the wavelength determined by the intersection energy can be used as a temperature invariant wavelength reference in spectral measurements.

U2 - 10.1063/1.4971831

DO - 10.1063/1.4971831

M3 - Article

VL - 109

JO - Applied Physics Letters

JF - Applied Physics Letters

SN - 0003-6951

IS - 23

ER -