Full-color-emitting CaYAl3O7:Pr3+,Ce3+ phosphor for near-UV LED-based white light

Abstract A full-color-emitting phosphor, CaYAl 3 O 7 :Pr 3+ ,Ce 3+ was synthesized through conventional solid-state reaction. The structural properties of the phosphor were analyzed by Rietveld refinement, maximum entropy method, and luminescent properties were analyzed by co-activating with different rare earth ions. Photoluminescence spectra on excitation with 450 nm source were dominated by green band at 490 nm originating from 3 P 0 → 3 H 4 transition of Pr 3+ ions and less intense band at 617 nm due to 1 D 2 → 3 H 4 transition. On codoping with Ce 3+ , phosphor exhibits an additional broad band originating from 5d 1 →4f 1 ( 2 F 7/2 and 2 F 5/2 ) of Ce 3+ , centered at around 540 nm due to efficient energy transfer from Pr 3+ levels to Ce 3+ levels. With this emission property we recommend CaYAl 3 O 7 :Pr 3+ ,Ce 3+ as potential single-phase full-color-emitting phosphor for solid-state lighting applications.