Solid state lighting element, peak wavelength estimation method and binning method

摘要

Disclosed is a method of estimating a peak wavelength of a solid state lighting element, the method comprising determining (330) a thermal admittance spectrum of the solid state lighting element, said spectrum identifying the energy levels of the trap states in the band gap of the solid state lighting element; identifying (350) the shallow trap states in said spectrum; and estimating (370) said peak wavelength from the respective energy gaps between the identified shallow trap states and the band gap boundary. A binning method for characterizing solid state lighting elements utilizing this estimation method and a solid state lighting element adapted to implement this estimation method are also disclosed.