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 | |
| Publication status | Published - 2016 |
| MoE publication type | A1 Journal article-refereed |
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Cite this
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