Effects of Mn2+ distribution controlled by carboxylic acids on photoluminescence intensity of nanosized ZnS:Mn particles

T. Isobe, T. Igarashi, M. Senna

Research output: Contribution to journalConference articlepeer-review

11 Citations (Scopus)

Abstract

Addition of methacrylic acid (MA) during preparation of ZnS doped with Mn2+ (ZnS:Mn) increased the photoluminescence (PL) due to 4T1-6A1 transition of Mn2+. According to X-ray fluorescence analysis and electron paramagnetic resonance spectroscopy, ion exchange between Zn2+ and Mn2+ through a preferential dissolution of Mn2+ was promoted by acidic additives. This caused that Mn2+ ions were isolatedly incorporated into ZnS. The X-ray photoelectron spectra show that the intensity of S 2p3/2 peak due to S6+ increased relative to that of S2- by virtue of carboxylic groups. The intensities of PL peaks at 450 and 580 nm, corresponding to polymethacrylic acid and Mn2+, respectively, increased after heating at 80°C for 1 week. We conclude that MA plays important roles on selective leaching to increase the amount of isolated Mn2+ ions, chemical interaction between ZnS:Mn and MA, and energy transfer to Mn2+, leading to the increase in PL intensity.

Original languageEnglish
Pages (from-to)305-310
Number of pages6
JournalMaterials Research Society Symposium - Proceedings
Volume452
Publication statusPublished - 1997 Jan 1
EventProceedings of the 1996 MRS Fall Meeting - Boston, MA, USA
Duration: 1996 Dec 21996 Dec 6

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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