High-pressure high-temperature preparation and luminescent properties of EuF3/C composites

EuF 3 /C composite materials were synthesized by one-step synthesis method using 2, 4, 6-trifluorobenzeneboronic acid and Eu(NO 3 ) 3 ·6H 2 O as raw materials under high pressure and high temperature (HPHT) conditions. The effect of pressure on the crystal phase, morphology and luminescent properties were investigated. By tuning the reaction pressure, α-EuF 3 , β-EuF 3 and EuBO 3 could be obtained. Also, the luminescent properties of the products were varied with the reaction pressure. Particularly, the fluorescence intensity increased sharply when the samples were pressurized to 5.0 GPa.