Archive | 2019
The Influence of the Variable Excitation Wavelength on the Spectral Characteristics of the Light Generated by the Luminescent Layer Consisting of YAG: Ce Phosphor and PDMS
Abstract
In this work, we explored the changes in the spectral characteristics of the light generated by the luminescent layer containing YAG: Ce phosphor and polydimethylsiloxane (PDMS) in relation to a variable excitation wavelength of the light emitted from the monochromator. We created two types of test samples with a defined thickness of the luminescent layer and with a defined weight ratio of phosphor (cerium-doped yttrium aluminum garnet YAG:Ce) in PDMS (Dowsil SE 1740). The correlated color temperature (CCT) of the first (second) type of samples ranged from 4387 to 6905 K (from 4923 to 8213 K) for excitation wavelengths of 425 445 nm (435 460 nm), respectively. The results revealed that this method can be used to design white light sources with an adjustable CCT. \uf020