Preparation and photoluminescence properties of a new orange-red Ba<inf>3</inf>P<inf>4</inf>O<inf>13</inf>:Eu³⁺phosphor

Key Words:Phosphors;Barium compounds - Citrus fruits - Europium compounds - III-V semiconductors - Light emitting diodes - Optical materials - Photoluminescence - Scanning electron microscopy - X ray powder diffraction;Average diameter - Excitation spectrum - Field emission scanning electron microscopes - Near ultraviolet - Orange-red phosphor - Photoluminescence properties - Solid state technique - White lightemitting diodes (WLEDs)

Abstract:A new orange-red Ba<inf>3</inf>P<inf>4</inf>O<inf>13</inf>:Eu³⁺phosphor has been synthesized by solid-state technique, and its photoluminescence properties were investigated. X-ray powder diffraction (XRD) analysis indicates that doping Eu³⁺does not change the lattice of Ba<inf>3</inf>P<inf>4</inf>O<inf>13</inf>. Field-emission scanning electron microscope (FE-SEM) images illustrate that microstructure of the phosphor consists of oval grains with average diameter of 1 &mu;m and heavy agglomerate phenomenon. The excitation spectra indicate the phosphor can be effectively excited by near ultraviolet (NUV) light, making it attractive as conversion phosphor for LED applications. The phosphor exhibits a bright orange-red emission excited by 394 nm light. The CIE chromaticity can be varied slightly by adjusting the content of Eu³⁺, which is attributed to the different lattice sites occupied by Eu³⁺in Ba<inf>3</inf>P<inf>4</inf>O<inf>13</inf>host. The photoluminescence studies indicate that Ba<inf>3</inf>P<inf>4</inf>O<inf>13</inf>:Eu³⁺is a potential orange-red phosphor for near-ultraviolet InGaN-based white light-emitting diodes (WLEDs). &copy; 2014 Elsevier GmbH. All rights reserved.<br/>

Volume:125

Issue:12

Translation or Not:no