2007•Journal of Solid Mechanics and Materials EngineeringOpen access

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

Sasithorn Khonthon, Shigeki MORIMOTO, Yasutake Ohishi

Abstract

Ni 2+ 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 Ni 2+ ions.This emission is due to 3 T 2 (F) → 3 A 2 (F) transition.

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Key concepts: Octahedron, Trigonal bipyramidal molecular geometry, Materials science, Luminescence, Ion, Coordination number, Photoluminescence, Tetrahedron