Luminescence Characteristics of Ni2+ Ion-Doped Glasses and Glass-Ceramics in Relation to Its Coordination Number

Sasithorn KHONTHON; Shigeki MORIMOTO; Yasutake OHISHI

doi:10.1299/jmmp.1.439

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Luminescence Characteristics of Ni2+ Ion-Doped Glasses and Glass-Ceramics in Relation to Its Coordination Number

Sasithorn KHONTHON, Shigeki MORIMOTO, Yasutake OHISHI

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Keywords: Ni²⁺ Ion, Transparent Glass-Ceramics, Absorption Spectra, UV-VIS-NIR Emission Spectra, Coordination Number

JOURNAL FREE ACCESS

2007 Volume 1 Issue 4 Pages 439-446

DOI https://doi.org/10.1299/jmmp.1.439

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Abstract

Ni²⁺ ions occupy the tetrahedral (4), trigonal bipyramid (5) and octahedral (6) sites in glasses and glass-ceramics. The color changes depending on coordination number, typically pink for tetrahedral site, brown for trigonal bipyramid and tetrahedral sites and green to blue for octahedral site, respectively. The broad near infrared (NIR) emission peaking at around 1220 nm was observed for octahedral Ni²⁺ ions. This emission is due to ³T₂(F)→³A₂(F) transition.

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