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DOI: 10.1039/A905724B (Paper) Reference Section for: J. Mater. Chem., 1999, 9, 2913-2918

Blue luminescence in yttrium and gadolinium niobates caused by bismuth. The importance of non-bonding ns2 valence orbital electrons

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Xiping Jing, Carol Gibbons, David Nicholas, Jack Silver, Aron Vecht and Christopher S. Frampton

Abstract

A blue luminescent emission band (440 nm) has been optimised in Y1 – xBixNbO (x = 0.005) for low voltage phosphor applications. The material has useful properties when compared to a commercially available phosphor. The role of the Bi3+ ion dopant is discussed in this lattice and in the related Gd1 – xBixNbO4 lattice. The movement of the emission band with %Bi3+ is rationalised using a simple electronic band structure model. It is demonstrated that the nature (symmetry) of the chemical environment of the Bi3+ is important for the influence of the cation on the luminescent properties.

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