Up-conversion characteristic and Judd-Ofelt calculation of BaGd_2ZnO_5:Er~(3+)/Yb~(3+) microcrystalline powder

摘要

Er3+/Yb3+ co-doped BaGd2ZnO5 microcrystalline powder are prepared through high-temperature solid phase method. Absorption spectrum are obtained and spectral characteristic are analyzed through Judd-Ofelt theory. The calculated spectrum intensity parameters are Omega(2) = 3.01 x 10(-20) cm(2), Omega(4) = 3.76 x 10(-20) cm(2) and Omega(6) = 0.43 x 10(-20) cm(2), respectively. The transition probability, branching ratio and energy level lifetime of Er3+ ion in BaGd2ZnO5 microcrystalline host are calculated. Up-conversion spectrum under 980 nm excitation are measured, The analyzed results indicates that three peaks of up-conversion luminescence, located at 533 nm, 553 nm and 670 nm, all belong to two photon absorbing process.