Affiliation:
1. Functional Materials Research Laboratory, Tongji University, 1239 Siping Road, Shanghai 200092, P. R. China
Abstract
Er 3+ and Yb 3+ co-doped CaBi 2 Ta 2 O 9 (CBT)-based bismuth layered-structure oxides were synthesized by a simple solid-state reaction method. Their up-conversion (UC) luminescence, dielectric and ferroelectric properties were investigated. Two strong green emission bands centered at 526 and 547 nm and a weak red emission band centered at 658 nm were obtained under a 980 nm laser excitation at room temperature. These emission bands originated from the radiative relaxation of Er 3+ from 2 H 11/2, 4 S 3/2, and 4 F 9/2 levels to the ground state 4 I 15/2, respectively. At the meantime, the fluorescence intensity ratio (FIR) variation of two green UC emissions at 526 and 547 nm has been studied as a function of temperature in the range of 153–603 K. The maximum sensor sensitivity obtained was 39 × 10-4 K-1 at 590 K, which indicated that Er 3+/ Yb 3+ co-doped CBT ceramic is a promising candidate for applications in optical high temperature sensor.
Publisher
World Scientific Pub Co Pte Lt
Subject
Electrical and Electronic Engineering,Condensed Matter Physics,Ceramics and Composites,Electronic, Optical and Magnetic Materials
Cited by
13 articles.
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