Abstract
| Original language | English |
|---|---|
| Journal | Applied Physics Letters |
| Volume | 109 |
| Issue number | 23 |
| DOIs | |
| Publication status | Published - 2016 |
| MoE publication type | A1 Journal article-refereed |
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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 journal › Article › Scientific › peer-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 -