Effects of Mn2+ Distribution Controlled by Carboxylic Acids on Photoluminescence Intensity of Nanosized ZnS:Mn Particles View Full Text


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Article Info

DATE

1996

AUTHORS

T. Isobe, T. Igarashi, M. Senna

ABSTRACT

Addition of methacrylic acid (MA) during preparation of ZnS doped with Mn 2+ (ZnS:Mn) increased the photoluminescence (PL) due to 4 T 1 - 6 A 1 transition of Mn 2+ . According to X-ray fluorescence analysis and electron paramagnetic resonance spectroscopy, ion exchange between Zn 2+ and Mn 2+ through a preferential dissolution of Mn 2+ was promoted by acidic additives. This caused that Mn ions were isolatedly incorporated into ZnS. The X-ray photoelectron spectra show that the intensity of S 2p 3/2 peak due to S 6+ increased relative to that of S 2- by virtue of carboxylic groups. The intensities of PL peaks at 450 and 580 nm, corresponding to polymethacrylic acid and Mn 2+ , 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 Mn 2+ ions, chemical interaction between ZnS:Mn and MA and energy transfer to Mn 2+ , leading to the increase in PL intensity. More... »

PAGES

305

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1557/proc-452-305

DOI

http://dx.doi.org/10.1557/proc-452-305

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1067937249


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