Luminescence and Spectroscopic Studies of (Y_0.99Ce_0.01)₃OF₃S₂: A New Orange Yellow‐emitting Oxyfluorosulfide Phosphor for LEDs

Abstract

A new Ce 3+ -doped oxyfluorosulfide phosphor, Y 3 OF 3 S 2 :Ce 3+ , has been investigated as a new candidate for potential application in phosphor-converted light emitting diodes (pc-LEDs). The synthesized Y 3 OF 3 S 2 :Ce 3+ was characterized by powder X-ray diffraction and various spectroscopic techniques. Y 3 OF 3 S 2 :Ce 3+ can be excited by wide-range (250-400 nm) radiation and shows yellow-orange broadband emission peaking at 610 nm with a quantum efficiency of 40%. These results indicate it may serve as a promising phosphor in near-UV pc-LEDs.