Synthesis of porous Y2O3:Er plates with enhanced upconversion luminescence properties

Abstract

Abstract Porous Y2O3:Er plates with enhanced upconversion luminescence properties have been synthesized through a hydrothermal method, followed by a post thermal treatment. The as-obtained products exhibit red (650–670 nm, 4F9/2→4I15/2) and green emission bands (520–570 nm, 2H11/2, 4S3/2→4I15/2) under 980 nm pumping. The shape and size of the pores in the plates can be tuned by controlling the reaction time in the autoclave. Moreover, the porous structure induces surface defects, which greatly affect the upconversion luminescence intensity and decay time. The potential mechanism for the effects of surface defects on the upconversion intensity and decay time was investigated, which could be a new complement for upconversion luminescence.