New Green Phosphor Ba3Si6O12N2:Eu for White LED: Crystal Structure and Optical Properties

Abstract:

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A new oxynitride, Ba3Si6O12N2, has been synthesized. The crystal structure has been successfully determined by close collaboration between experiment and first-principles calculation. This compound doped with Eu exhibits intense green photoluminescence with high color purity under near-ultraviolet to blue light excitation; in particular, it has much less thermal quenching than (Ba,Sr,Eu)2SiO4. Thus (Ba,Eu)3Si6O12N2 appears promising green phosphor for white LED backlight for display. The atomic/electronic structure is discussed in comparison with Ba3Si6O9N4, which could not become efficient phosphor by doping Eu due to strong thermal quenching at room temperature.

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Periodical:

Edited by:

Katsutoshi Komeya, Yi-Bing Cheng, Junichi Tatami and Mamoru Mitomo

Pages:

11-14

DOI:

10.4028/www.scientific.net/KEM.403.11

Citation:

M. Mikami et al., "New Green Phosphor Ba3Si6O12N2:Eu for White LED: Crystal Structure and Optical Properties ", Key Engineering Materials, Vol. 403, pp. 11-14, 2009

Online since:

December 2008

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$35.00

[1] T. L. Barry : J. Electrochem. Soc. Vol. 115 (1968), p.1181.

[2] N. Hirosaki et al., Appl. Phys. Lett. 86 (2005), p.211905.

[3] K. Uheda et al., Electrochem. Solid State Lett. Vol. 9, (2006), p. H22.

[4] R. Müller-Mach et al., phys. stat. sol. (a) Vol. 202 (2005), p.1727.

[5] F. Stadler and W. Schnick, Z. Anorg. Allg. Chem. Vol. 632 (2006), p.949.

[6] S. Shimooka, K. Uheda, M. Mikami, N. Kijima, H. Imura, and K. Horibe, PCT WO2007/088966.

[7] The ABINIT code is a common project of the Université Catholique de Louvain, Corning Incorporated, and other contributors (URL http: /www. abinit. org). X. Gonze et al., Comput. Mater. Sci. 25 (2002).

[8] K. Uheda et al., the 14th International Display Workshop, Sapporo, Japan (2007).

[9] P. Dorenbos, J. Phys.: Condens. Matter Vol. 17 (2005), p.8103.

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