LAUSR

A series of novel Ce3+ singly doped and Ce3+, Tb3+ co-doped Ba3P4O13 phosphors [Ba3P4O13:Ce3+, Ba3P4O13:Ce3+,Tb3+] were synthesized via the high-temperature solid-state reaction method. The photoluminescence properties and energy transfer behavior of the as-prepared phosphors were investigated in detail. The Ba3P4O13:Ce3+ phosphors produced broadband emission ranging from 300 to 400 nm upon UV excitation. The optimal concentration of Ce3+ and critical distance for Ce3+→Ce3+ energy transfer was ascertained by investigating the concentration dependent luminescence properties of Ce3+ in Ba3P4O13 host. The Ce3+→Tb3+ energy transfer phenomenon was proved to exist in the Ba3P4O13:Ce3+,Tb3+ phosphors, which led to the broadband sensitized yellowish-green emission of Ba3P4O13:Ce3+,Tb3+ phosphors upon UV excitation. The efficiency and mechanism of Ce3+→Tb3+ energy transfer was also investigated by theoretical calculation.