Three Color Upconversion Luminescence of Er³⁺/Yb³⁺/Tm³⁺ Doped Tellurite Glass for Display Applications

Abstract

Red, green and blue (RGB) emissions related to frequency upconversion and energy transfer process in Er 3+ /Tm 3+ /Yb 3+ doped tellurite glass under 980 nm excitation are reported. The intense blue (480 nm), green (525 and 550 nm) and red (650 nm) emissions are simultaneously observed at room temperature. The blue was originated from the 1 G 4 → 3 H 6 transition of Tm 3+ ; the green (525 and 550 nm), and red (650 nm) upconversion luminescences were identified from the 2 H 11/2 → 4 I 15/2 , 4 S 3/2 → 4 I 15/2 and 4 F 9/2 → 4 I 15/2 , transitions of Er 3+ respectively. Different concentrations of Tm 2 O 3 and Yb 2 O 3 were used in order to see the influence on the RGB upconversion properties. The intense red, green and blue upconversion luminescence of these glasses might provide the development of potential three-dimensional displays.