Phase-separation enhanced upconversion luminescence with regulated pure-red emission in manganese fluorosilicate glass

Abstract

In this work, rare earth ions (REs) including Yb3+/Er3+, Yb3+/Ho3+ and Yb3+/Tm3+ co-doped manganese oxyfluoride glasses were fabricated using melt quenching method. By fully utilizing the upconversion luminescence (UCL) of REs and regulating energy transfer between the different energy levels of RE ions and the 4T1 level of Mn2+, the output of UCL was regulated and even pure-red light can be achieved. Moreover, owing to the selective partitioning caused by phase-separation network structure in the oxyfluoride glass, the UCL intensity of glasses annealed for 72 h is significantly enhanced 58 times compared to the rapidly quenched samples.