Preparation and Luminescence Properties of SrSi2O2N2:Eu2+ Phosphors for White LEDs

• YUN Bong-Goo

  Center for Advanced Science and Innovation, Osaka University

• MACHIDA Ken-ichi

  Center for Advanced Science and Innovation, Osaka University

• YAMAMOTO Hajime

  School of Bionics, Tokyo University of Technology

Abstract

This work has investigated luminescence properties of SrSi₂O₂N₂: Eu²⁺ phosphors synthesized by a new method using Sr₂SiO₄: Eu²⁺ as a precursor. Compared with a conventional solid-state reaction method, this method provides increased crystallinity and luminescence efficiency. X-ray diffraction analysis has indicated that SrSi₂O₂N₂: Eu²⁺ formed as an almost single-phase, but chemical analysis has shown that obtained samples have an oxygen/nitrogen atomic ratio deviated from the stoichiometric composition. It can be expected that luminescence efficiency of this phosphor will be higher for the stoichiometric composition than for non-stoichiometric ones. Under 460 nm excitation, this phosphor shows an emission band peaked at 538-564 nm for varied Eu²⁺ concentration, and shows the maximum at 15 mol% with high integrated photoluminescence intensity, which is about 1.05 times as high as that of the commercial yellow phosphor, (Y,Gd)₃Al₅O₁₂: Ce³⁺ (P46-Y3).<br>

Journal

• Journal of the Ceramic Society of Japan

  Journal of the Ceramic Society of Japan 115 (1346), 619-622, 2007

  The Ceramic Society of Japan

Keywords

• Phosphor
• Oxynitride
• Precursor
• White LEDs
• Europium

Details

• CRID: 1390282680261306112
• NII Article ID: 110006436412
• NII Book ID: AA12229489
• DOI: 10.2109/jcersj2.115.619
• COI: 1:CAS:528:DC%2BD2sXht1SksrvK
• ISSN: 13486535
• ISSN: 18820743
• NDL BIB ID: 8936383
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I8936383
• Web Site: http://www.jstage.jst.go.jp/article/jcersj2/115/1346/115_1346_619/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
• Abstract License Flag: Disallowed