Photoluminescence of Eu[sup 3+]-Doped Ba[sub 0.7]Sr[sub 0.3]TiO[sub 3] Thin Film for Optoelectronic Application

Abstract

The europium-doped barium strontium titanate (BST:Eu) films find application in ferroelectric as well as in optoelectronic devices. In this paper, we report the pulsed laser deposition (PLD) of BST:Eu thin films. The structural and optical properties of the PLD-grown BST film have been investigated and correlated. The photoluminescence spectra show the prominent transitions of Eu3+ ions at 550 nm (5D1 - 7F 2), 615 nm (5D0 - 7F2), and 669 nm (5D0 - 7F3) upon excitation with 408 nm. The luminescent properties of BST:Eu thin films follow a close correlation with the crystallinity of the thin films. Films deposited at a lower substrate temperature show good luminescent characteristics. © 2010 The Electrochemical Society.