Light up-conversion and structural properties of Sn and Er3+ doped Ba.995 Er.005 (Sn.06Ti.94)O3 ceramics

Abstract

Structural and light up-conversion properties of Ba(Sn.06Ti0.94)O3 and Ba.995Er.005(Sn.06Ti0.94)O3 compositions prepared by solid-state reaction method are compared. X-ray diffraction confirms single phase formation with an orthorhombic structure in both the compositions, and with the additional Er3+ dopant at the A-site the ortho-rhombic distortion (b/a) is found to increase from 1.414 to 1.420. Infrared to visible light up-conversion (UC) is observed under excitation with a 980 nm diode laser at room temperature. The observed weak red emission at 662 nm, and the two strong green emission bands at 525 nm and 550 nm are attributed to the transitions 4F9/2 → 4I15/2 and 4H11/2→4I15/2, 4S3/2→4I15/2 respectively and the dependence of up-conversion emission on laser power (50-130 mW) indicates a two-photon absorption and interaction. The two dopants (Sn and Er) are found to be promising for developing an efficient mechano-luminescent material.Structural and light up-conversion properties of Ba(Sn.06Ti0.94)O3 and Ba.995Er.005(Sn.06Ti0.94)O3 compositions prepared by solid-state reaction method are compared. X-ray diffraction confirms single phase formation with an orthorhombic structure in both the compositions, and with the additional Er3+ dopant at the A-site the ortho-rhombic distortion (b/a) is found to increase from 1.414 to 1.420. Infrared to visible light up-conversion (UC) is observed under excitation with a 980 nm diode laser at room temperature. The observed weak red emission at 662 nm, and the two strong green emission bands at 525 nm and 550 nm are attributed to the transitions 4F9/2 → 4I15/2 and 4H11/2→4I15/2, 4S3/2→4I15/2 respectively and the dependence of up-conversion emission on laser power (50-130 mW) indicates a two-photon absorption and interaction. The two dopants (Sn and Er) are found to be promising for developing an efficient mechano-luminescent material.