Structure and optical properties of Lu2SiO5:Ce phosphor thin films

Abstract
Luminescent, cerium doped Lu2SiO5 thin films with C2∕c symmetry have been prepared by pulsed laser deposition (PLD) at temperatures much lower than the crystallization temperature (2150°C) of the corresponding bulk crystals. The PLD grown films show the typical luminescence resulting from the Ce3+ 5d-4f transition. Maximum luminescence efficiency was observed for films prepared at an oxygen partial pressure of 200mTorr at 600°C. These conditions reflect a balance between Ce4+∕Ce3+ interconversion and the crystalline quality of the films. The results indicate that PLD offers a low temperature deposition technique for complex oxide phosphor materials.