Luminescence Properties of Rare-Earth Doped α-SiAlONs

Abstract:

Article Preview

Rare-earth doped Ca-α-SiAlON phosphors, with the compositions of (Ca1-3/2xREx)m/2Si12-m-nAlm+nOnN16-n (RE = Ce, Sm, Eu, Tb, Yb and Dy, 0.5 ≤ m = 2n ≤ 3.0), were prepared by reaction at 1700oC for 2h under 10 atm N2. The concentration of rare earths varied from 3 to 30 at% with respect to Ca. The photoluminescence properties of the powders were investigated at room temperature. The results show that (i) strong visible emissions are observed in rare-earth doped Ca-α-SiAlONs; (ii) the emission properties can be optimized by tailoring the activator concentration and the composition of the α-SiAlON host crystal; and (iii) the yellow Eu2+-doped Ca-α-SiAlON phosphors can be used in warm white LEDs.

Info:

Periodical:

Key Engineering Materials (Volumes 317-318)

Edited by:

T. Ohji, T. Sekino and K. Niihara

Pages:

797-802

DOI:

10.4028/www.scientific.net/KEM.317-318.797

Citation:

R. J. Xie et al., "Luminescence Properties of Rare-Earth Doped α-SiAlONs", Key Engineering Materials, Vols. 317-318, pp. 797-802, 2006

Online since:

August 2006

Export:

Price:

$35.00

[1] S. Hampshire, H.K. Park, D.P. Thompson and K.H. Jack: Nature Vol. 274 (1978), p.880.

[2] I-W. Chen, P.F. Becher, M. Mitomo, G. Petzow and T-S. Yen: Silicon Nitride Ceramics (Mater. Res. Soc., Pittsburgh, PA, 1993).

[3] I-W. Chen and A. Rosenflanz: Nature Vol. 389 (1997), p.701.

[4] G.Z. Cao and R. Metselaar: Chem Mater. Vol. 3 (1991), p.242.

[5] T. Ekstrom and M. Nygen: J. Am. Ceram. Soc. Vol. 75 (1992), p.259.

[6] Z. Shen and M. Nygren: J. Euro. Ceram. Soc. Vol. 17 (1997), p.1639.

[7] A. Rosenflanz and I-W. Chen: J. Am. Ceram. Soc. Vol. 82 (1999), p.1025.

[8] J.W.H. van Krevel, J.W.T. van Rutten, H. Mandal, H.T. Hintzen and R. Metselaar: J. Solid State Chem. Vol. 165 (2002), p.19.

[9] � R.J. Xie, M. Mitomo, K. Uheda, F.F. Xu and Y. Akimune: J. Am. Ceram. Soc. Vol. 85 (2002), p.1229.

[10] R.J. Xie, N. Hirosaki, M. Mitomo, Y. Yamamoto, T. Suehiro and N. Ohashi: J. Am. Ceram. Soc. Vol. 87 (2004), p.1368.

[11] R.J. Xie, N. Hirosaki, K. Sakuma, Y. Yamamoto and M. Mitomo: Appl. Phys. Lett. Vol. 84 (2004), p.5404.

[12] R.J. Xie., N. Hirosaki, M. Mitomo, Y. Yamamoto, T. Suehiro and K. Sakuma: J. Phys. Chem. B108 (2004), p.12027.

[13] G. Blasse and B.C. Grabmaier: Luminescent Materials (Springer-Verlag, Berlin, 1994).

[14] L.G. van Uitert and L.F. Johnson: J. Chem. Phys., Vol. 44 (1966), p.3514.

[15] R. J. Xie, M. Mitomo, F. F. Xu, K. Uheda, and Y. Bando: Z. Metallk. Vol. 92 (2001), p.931.

[16] R. J. Xie, N. Hirosaki, Y. Yamamoto, T. Suehiro, X. Xu and M. Mitomo: unpublished work.

[17] S. Nakamura and G. Fasol: The Blue Laser Diode: GaN Based Light Emitters and Lasers (Springer-Verlag, Berlin, 1997).

[18] M. Yamada, T. Naitou, K. Izuno, H. Tamaki, Y. Murazaki, M. Kameshima, and T. Mukai: Jpn. J. App. Phys., Vol. 42 (2003), L20.

[19] K. Sakuma, K. Omichi, N. Kimura, M. Ohashi, D. Tanaka, N. Hirosaki, Y. Yamamoto, R. J. Xie and T. Suehiro: Opt. Lett., Vol. 29 (2004), p. (2001).

In order to see related information, you need to Login.