relation: https://eprints.uet.vnu.edu.vn/eprints/id/eprint/3809/
title: Influences of growth durations on characteristics of NaYF4:(Yb,Tm) upconversion materials
creator: Nguyen, Thi Dung
creator: Hoang, Van Thanh
creator: Nguyen, Dinh Lam
subject: Engineering Physics
description: NaYF4:(Yb,Tm) upconversion materials  were synthesized by the simple hydrothermal method. Growth duration was varied from 4h to 12h under a growth temperature of 150oC. The structural, optical and surface morphology characteristics of the NaYF4:(Yb,Tm) UC materials were investigated. The XRD and SEM results illustrated that the NaYF4:(Yb,Tm) materials were transformed from the multiple phases (hexagonal and cubic) to the single-phase (hexagonal prism) as growth duration being longer than 8h with the average diameter and length of these prisms being about 0.5 µm and 2 µm, respectively. Under 980 nm laser excitation, the NaYF4:(Yb,Tm) emits at peaks of 450 nm (1D2→ 3F4), 475 nm (1G4→3H6), 647 nm (1G4→3F4) and 697  nm (3F3→3H6), with the highest emission belonging to NaYF4:(Yb,Tm) grown for 8h.
publisher: VNU Journal of Science: Natural Science and Technology
date: 2019
type: Article
type: PeerReviewed
format: application/msword
language: en
identifier: https://eprints.uet.vnu.edu.vn/eprints/id/eprint/3809/1/4965%29%20L%C3%A2m%200902.233.144%20%20%2827-10%2C%201-12%2C%203-12%29.docx
identifier:   Nguyen, Thi Dung and Hoang, Van Thanh and Nguyen, Dinh Lam  (2019) Influences of growth durations on characteristics of NaYF4:(Yb,Tm) upconversion materials.  Influences of growth durations on characteristics of NaYF4:(Yb,Tm) upconversion materials, 35  (4).    ISSN 0866-8612