Sol-Gel Synthesis and Optical Temperature Sensing Behavior of Double-Perovskite Gd2ZnTiO6:Yb3+/Er3+ Phosphors. (19th November 2019)

• Record Type: Journal Article
• Authors: Liao, Jinsheng; Kong, Liyun; Wang, Minghua; Huang, Junxiang
• Is Part Of: ECS journal of solid state science and technology. Volume 8:Number 11(2019)
• Page Start: R149
• Page End: R156
• Publication Date: 2019-11-19
• Subjects: Luminescence -- Sensors -- Luminescence -- Phosphor -- Upconversion; Solid state chemistry -- Periodicals; Electronics -- Materials -- Periodicals; Electrochemistry -- Periodicals; 541.0421
• DOI: 10.1149/2.0181911jss
• Languages: English
• ISSNs: 2162-8777

Abstract

Abstract : The Gd2 ZnTiO6 :Yb 3+ /Er 3+ phosphors (abbreviated as GZT:Yb 3+ /Er 3+ ) have been successfully prepared by means of the sol-gel method. The GZT:Yb 3+ /Er 3+ phosphor exhibits intense green upconversion (UC) emission bands near 525/547 nm ( 2 H11/2 / 4 S3/2 → 4 I15/2 ) and weak red UC emission band near 663 nm ( 4 F9/2 → 4 I15/2 ) upon the 980 nm laser excitation. Furthermore, the sample simultaneously emits near-infrared centered at 1527 nm associated with 4 I13/2 → 4 I15/2 transition of Er 3+ ions. The high thermal activation energy (0.34 eV) of the GZT:Yb 3+ /Er 3+ phosphor is determined via the temperature dependent luminescence spectra upon the 980 nm laser excitation (low power density: 0.8W/cm 2 ). Two thermally coupled levels ( 2 H11/2 / 4 S3/2 ) for Er 3+ using the fluorescence intensity ratio (FIR) technology were studied in detail. The maximum absolute sensitivity (90.11 × 10 −4 K −1 at 539 K) of the targeted phosphor is determined from the experimental results. All results demonstrate a potential of application of as-prepared GZT:Yb 3+ /Er 3+ phosphors in optical thermometry.