Temperature invariant energy value in LED spectra
Research output: Contribution to journal › Article
- VTT MIKES Metrology
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.
|Journal||Applied Physics Letters|
|Publication status||Published - 5 Dec 2016|
|MoE publication type||A1 Journal article-refereed|