Synthesis and investigation of photo/cathodoluminescence properties of a novel green emission phosphor Sr8ZnLu(PO4)(7):Eu2+

摘要

An Eu2+-activated Sr8ZnLu(PO4)(7) (SZLP:Eu2+) green emitting phosphor was synthesized and its crystal structure has been refined and determined from the XRD profiles by Rietveld refinement method. The excitation spectra of the SZLP:Eu2+ phosphors covered the range from 250 to 450 nm, which matches well with n-UV chips. SZLP:Eu2+ exhibited broad-band green emission centered at about 520 nm under 400 nm irradiation with a high quantum efficiency (QE) value of 67.4% and good thermal stability, its emission intensity remains 77% at 150 degrees C of that measured at room temperature. In addition, to investigate its application in field emission displays, the cathodoluminescence spectra of SZLP:Eu2+ as a function of the accelerating voltage, probe current and the electron radiation time were also measured and discussed in detail. Excellent degradation resistance properties with good color stability were obtained by continuous low-voltage electron-beam excitation of the phosphor. (C) 2016 Elsevier B.V. All rights reserved.