Up-conversion luminescence and optical temperature-sensing properties of Er3+-doped perovskite Na0.5Bi0.5TiO3 nanocrystals

摘要

In this work we demonstrate the preparation of Er3+ doped perovskite ferroelectric Na(0.5)Bia(5)TiO(3) nanocrystals and their application in temperature sensing. The samples were synthesized via a facile hydrothermal method. Upconversion emission at 528 nm and 547 nm from two thermodynamically coupled excited states of Er3+ were recorded in the temperature from 80 K to 480 K under the excitation of a 980 nm diode laser. The emission intensity ratio (I-528/I-547) as a function of the temperature was investigated. A sensitivity of 0.0053 K-1 is observed at 400 K, suggesting they are promising candidate for nanothermometers. (C) 2016 Elsevier Ltd. All rights reserved.