ABSTRACT
Glass is very versatile and a good host for rare-earth ions since the glass host provides elevated optical transparency, fine rare-earth ion solubility, and can be cast in almost any shape or size. Therefore, glasses stand for an attractive substitute to phosphors for lighting devices owing to their high thermal and chemical steadiness. Recently, potential glasses activated with various rare-earth ions have been evaluated for solid state lighting applications. It is demonstrated that the emission intensity of any Rare-Earth (RE) activated glass can be enhanced over an extensive spectral range by changing the RE doping concentrations accordingly. Also, modifications in the color coordinates can be achieved by co-doping the RE ions. Various energy transfer mechanisms between the double-activated ions allow for changes in the color coordinates. This short chapter briefly demonstrated the photoluminescence of some potential glass systems activated with various RE ions for the lighting applications.
