Title: Morphology and optical properties of chemically synthesised CePO₄:Tb³⁺ nanorods

Authors: Chinh Dung Trinh; Phuong Hau Thi Pham; Dung My Thi Dang; Chien Mau Dang

Addresses: Institute for Nanotechnology (INT), Community 6, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, 700000, Vietnam; Vietnam National University Ho Chi Minh City (VNUHCM), Community 6, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, 700000, Vietnam; The University of Science, Vietnam National University, Ho Chi Minh City, 700000, Vietnam ' Institute for Nanotechnology (INT), Community 6, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, 700000, Vietnam; Vietnam National University Ho Chi Minh City (VNUHCM), Community 6, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, 700000, Vietnam ' Institute for Nanotechnology (INT), Community 6, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, 700000, Vietnam; Vietnam National University Ho Chi Minh City (VNUHCM), Community 6, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, 700000, Vietnam ' Institute for Nanotechnology (INT), Community 6, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, 700000, Vietnam; Vietnam National University Ho Chi Minh City (VNUHCM), Community 6, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, 700000, Vietnam

Abstract: CePO₄:Tb³⁺ nanorods with hexagonal structures were successfully synthesised by hydrothermal method. According to the results of X-ray diffractions (XRD), all diffraction peaks were well indexed corresponding to the hexagonal phase of CePO₄ host (JCPDS 34-1380). Field Emission Scanning Electron Microscopy (FE-SEM) device was used for studying the morphology of prepared samples. In this study, there were different PO₄/Ce molar ratios used to synthesise CePO₄:Tb³⁺ nanorods. Nanorod formation had the tendency towards bundle-like shape with the increasing length occurring as the PO₄/Ce molar ratio reached the range from 100 to 140. Energy dispersive X-ray (EDX) provided the sample composition information. Photoluminescence (PL) results clearly exhibited the strongest green emission peak at ~543 nm, under 275 nm excitation. The highest luminescent intensity was obtained in the sample prepared by 5% Tb³⁺ doped molar concentration and PO₄/Ce molar ratio at 140. The average lifetimes of samples synthesised by Tb³⁺ doped molar concentration at 1, 3, 5% relatively at 543 nm emission under 275 nm excitation were respectively at 0.136, 1.046, 2.701 ms.

Keywords: luminescent material; nanoparticles; CePO₄ nanophosphor; rare earth nanocrystals.

DOI: 10.1504/IJNT.2020.111330

International Journal of Nanotechnology, 2020 Vol.17 No.7/8/9/10, pp.636 - 647

Published online: 20 Nov 2020 *

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