Microwave hydrothermal synthesis and upconversion properties of Yb3+/Er3+ doped YVO4 nanoparticles. (23rd March 2018)

• Record Type: Journal Article
• Authors: Kshetri, Yuwaraj K; Regmi, Chhabilal; Kim, Hak-Soo; Lee, Soo Wohn; Kim, Tae-Ho
• Is Part Of: Nanotechnology. Volume 29:Number 20(2018)
• Publication Date: 2018-03-23
• Subjects: microwave hydrothermal -- YVO4 -- upconversion -- energy transfer; Nanotechnology -- Periodicals; Nanotechnology -- Periodicals; Nanotechnology; Publications périodiques; Nanotechnologies; Periodicals; 620.5
• DOI: 10.1088/1361-6528/aab2bf
• Languages: English
• ISSNs: 0957-4484

Abstract

Abstract: Yb 3+ and Er 3+ doped YVO4 (Yb 3+ /Er 3+ :YVO4 ) nanoparticles with highly efficient near-infrared to visible upconversion properties have been synthesized by microwave hydrothermal process. Uniform-sized Yb 3+ /Er 3+ :YVO4 nanoparticles were synthesized within 1 h at 140 °C which is relatively faster than the conventional hydrothermal process. Under 980 nm laser excitation, strong green and less strong red emissions are observed which are attributed to 2 H11/2, 4 S3/2 to 4 I15/2 and 4 F9/2 to 4 I15/2 transitions of Er 3+ respectively. The emission intensity is found to depend strongly on the concentration of Yb 3+ . The quadratic dependence of upconversion intensity on the excitation power indicates that the upconversion process is governed by two-photon absorption process.