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This work investigated the photoluminescence behaviour of Tb 3+  doped BiPO 4  nanophosphors synthesised by co-precipitation method using ethylene glycol. The prepared nanophosphors were characterised by XRD, SEM, FT-IR and PL spectroscopy techniques. Monoclinic phase was observed from the XRD and FT-IR studies. SEM image showed agglomeration of nanoparticles. In the emission spectra, band originated from  3 P 1 – 1 S 0  transition of Bi 3+  ion and bands due to  5 D 4  →  7 F 6,5,4,3  transitions of doping Tb 3+  ion were observed upon excitation at 351 nm. The emission intensity was found to accentuate with the increase in Tb 3+  ion concentration upto 3at. % and subsequently attenuated with further increase in Tb 3+  ion concentration due to concentration quenching effect. The decay time of the prepared phosphors was also investigated. The CIE chromaticity diagram revealed a nearly white colour emission upon excited at 351 nm. It is possible that the prepared phosphors may be useful for solid-state lighting.

Photoluminescence properties of Tb 3+ doped BiPO 4 nanophosphor synthesised by co-precipitation method using ethylene glycol