Temperature invariant energy value in LED spectra

Hans Baumgartner; Anna Vaskuri; Petri Kärhä; Erkki Ikonen

doi:10.1063/1.4971831

Temperature invariant energy value in LED spectra

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

BA17 National metrology institute VTT MIKES

Research output: Contribution to journal › Article › Scientific › peer-review

7 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 language	English
Journal	Applied Physics Letters
Volume	109
Issue number	23
DOIs	https://doi.org/10.1063/1.4971831
Publication status	Published - 2016
MoE publication type	A1 Journal article-refereed

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10.1063/1.4971831

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title = "Temperature invariant energy value in LED spectra",

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.",

author = "Hans Baumgartner and Anna Vaskuri and Petri K{\"a}rh{\"a} and Erkki Ikonen",

year = "2016",

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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

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