Abstract
The luminescent properties of Tb3+ have been studied for borosilicate glasses prepared by a sol-gel method. Gel bodies were formed from solutions consisting of silicon tetraethoxide, triethyl borate, ethanol, water and terbium nitrate, then sintered into a bulk glass. The Tb3+ luminescence in glasses mostly shows green light under UV excitation, because the emission line at 545 nm occupies the main part of the energy emitted. The observed luminescence consisted of four main emission lines originating from the 5D4 level. However, a remarkable spectral change has been observed for the Tb3+ luminescence in borosilicate glasses after firing at about 800°C. This spectral change due to heat treatment was found to be large enough to show yellow or red luminescence, suggesting that the crystal field acting on Tb3+ is very strong. The spectral energy distribution of Tb3+ luminescence in sol-gel derived borosilicate glasses were investigated in relation to the effects of calcination temperature.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
