Optical Properties of Eu[sup 2+]-Activated Sr[sub 2]SiO[sub 4] Phosphor for Light-Emitting Diodes

Abstract

We have synthesized a -activated yellow phosphor and investigated an attempt to develop white light-emitting diodes (LEDs) by combining the phosphor with a GaN blue LED chip. Two distinct emission bands from the GaN-based LED and the phosphor are clearly observed at 400 nm and at around 550 nm, respectively. These two emission bands combine to give a spectrum that appears white to the naked eye. Also, we investigated the compositional dependence of the luminescence properties of ions based on the different contents. © 2004 The Electrochemical Society. All rights reserved.