SYNTHESIS AND OPTICAL PROPERTIES INVESTIGATION OF MULTI-COLOUR EMITTING GdPO4:Ce3+/Tb3+,Eu3+ NANOPARTICLES

Egle Ezerskyte; Arturas Katelnikovas

ᐊ O1-5

Open Readings 2021 • O2-1

O2-3 ᐅ

SYNTHESIS AND OPTICAL PROPERTIES INVESTIGATION OF MULTI-COLOUR EMITTING GdPO₄:Ce³⁺/Tb³⁺,Eu³⁺ NANOPARTICLES

Egle Ezerskyte¹, Arturas Katelnikovas¹

¹ Institute of Chemistry, Faculty of Chemistry and Geosciences, Vilnius University, Lithuania

[email protected]

Hydrothermal reaction synthesis method was chosen to produce undoped GdPO₄ samples in order to determine optimal synthesis conditions (Gd:P molar ratio and pH value of the reaction mixture) seeking to obtain nano-scale particles. As depicted in Fig. 1, GdPO₄ nanorods (approx. 80 nm in length and 20 nm in width) are produced if the Gd:P molar ratio is equal to 1:10 and the pH value of the reaction mixture is equal to 10.

**Fig. 1.** SEM images of GdPO₄ particles synthesized at a constant Gd:P molar ratio (1:10) but under different pH values of the reaction mixture.

Further on our research focused on producing GdPO₄ nanorods doped with Ce³⁺, Tb³⁺ and Eu³⁺ ions individually and in different two-ion combinations under fixed synthesis conditions (Gd:P = 1:10, pH = 10) following by the characterization of structural and optical properties of the obtained compounds.

Thus, detailed analysis and obtained results of XRD patterns, SEM images, reflection, excitation and emission spectra of GdPO₄:Ce³⁺,Tb³⁺,Eu³⁺ and GdPO₄:Ce³⁺/Tb³⁺,Eu³⁺ phosphors will be presented.

Acknowledgments: This project has received funding from European Social Fund (project No. 09.3.3-LMT-K-712-22-0271) under grant agreement with the Research Council of Lithuania (LMTLT).