Optical Properties of Three-Band White Light Emitting Diodes

Abstract

A phosphor was synthesized using a decomposition method without the use of toxic gas. and ZnCdS:Ag,Cl phosphors were chosen to produce green and red emissions, respectively, under excitation from a blue light emitting diode (LED). A three band white LED was obtained through a combination of nonabsorbed blue emission from a blue LED and green and red emissions from the and ZnCdS:Ag,Cl phosphors. The optical properties of the three band white LED are also discussed. © 2003 The Electrochemical Society. All rights reserved.