A Single‐Phased Sr1−y‐3x/2Al2Si2O8: xCe3+, yMn2+ with Efficient Energy Transfer as a Potential Phosphor for White‐Light‐Emitting Diodes. Issue 8 (12th May 2014)

• Record Type: Journal Article
• Authors: Dai, Wubin; Dunn, B.
• Is Part Of: Journal of the American Ceramic Society. Volume 97:Issue 8(2014)
• Page Start: 2531
• Page End: 2538
• Publication Date: 2014-05-12
• Subjects: Ceramics -- Periodicals; 620.1405
• DOI: 10.1111/jace.12955
• Languages: English
• ISSNs: 0002-7820

Abstract

<abstract abstract-type="main" id="jace12955-abs-0001"> <title> <x xml:space="preserve">Abstract</x> </title> <p>A series of Ce³⁺‐ and Mn²⁺‐(co‐)activated SrAl₂Si₂O₈ phosphors have been prepared at 1350°C under a reducing atmosphere and their photoluminescence properties have been studied as a function of the (co‐)dopant ions concentrations. We have discovered that energy transfer (ET) not only from Ce³⁺ to Mn²⁺ but also from "defects" to Mn²⁺ by the facts that there is existing significant overlap between the emission spectrum of Ce³⁺ ("defects") and the excitation spectrum of Mn²⁺. The source of the "defects" in the host lattice is originated from the different charge substitution between Ce³⁺ and Sr²⁺. By adopting the principle of ET, the material SrAl₂Si₂O₈: Ce, Mn can act as a phosphor for white‐light ultraviolet light‐emitting diodes (UV‐LEDs) by tuning of the dopants contents.</p> </abstract>