A New Scheme of Luminous Glass for Solid-State Lighting: Nb-Si-Na-K Glass

Abstract

Abstract: Luminescent glass is one of the effective candidates for solid-state lighting. Niobate glass systems have rarely been reported in the field of luminescence applications. In this study, a series of Nb-Si-Na-K luminescent glasses were prepared by high-temperature melting quenching technique. By changing the proportion of each component of the glass matrix, the structure of the glass network can be affected to regulate the luminous intensity and time. The existence of a large number of O-Nb-O and Si-O-Si bonds in the glass network ensures the stable structure of Nb-Si-Na-K luminous glass. The luminescence chromaticity stability of the glass is revealed by CIE coordinate diagram, and the high thermal stability is proved by differential thermal analysis curve. 35Nb2O5-35SiO2-10Na2O-20K2O based glass can achieve effective luminescence under the doping of Dy3+/Eu3+/Sm3+/Tb3+ ions. Among them, 35Nb2O5-35SiO2-10Na2O-20K2O-1Dy2O3 luminous glass has high transmittance (80%) and high quantum efficiency (41.3%). The results show that Nb-Si-Na-K luminescent glass has the potential to be used in solid state lighting.

Keywords: Solid-state lighting, Niobate, Glass network structure, Doping of Dy3+/Eu3+/Sm3+/Tb3+ ions