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The effects of zinc on the characteristics of (Zn,Ca)TiO3:Pr3+ phosphors

✍ Scribed by Sung Mook Chung; Seung-Youl Kang; Jae-Heon Shin; Woo-Seok Cheong; Chi-Sun Hwang; Kyoung Ik Cho; Seung Jae Lee; Young Jin Kim

Publisher
Elsevier Science
Year
2011
Tongue
English
Weight
760 KB
Volume
326
Category
Article
ISSN
0022-0248

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✦ Synopsis

The effects of zinc on the zinc-doped CaTiO 3 :Pr 3 + phosphors have been investigated by varying the zinc concentrations from 0 to 100 mol%. The variation of zinc concentration influences the crystallinity and morphology of the phosphors. The crystallinity and PL intensity increase as zinc content increases from 0 to 25 mol%. (Zn,Ca)TiO 3 :Pr 3 + at 25 mol% Zn exhibits nearly 3.6 times enhanced PL intensity compared to CaTiO 3 :Pr 3 + . Moreover, the red emitting phosphor developed in this study can be very effectively excited at the wavelengths of 400 nm. We think that (Zn,Ca)TiO 3 :Pr 3 + can be used as a complementary phosphor in the red region for the white LEDs.

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Novel efficient phosphors on the base of
Novel efficient phosphors on the base of Mg and Zn co-doped SrTiO3:Pr3+
✍ H. Ryu; B.K. Singh; K.S. Bartwal; M.G. Brik; I.V. Kityk πŸ“‚ Article πŸ“… 2008 πŸ› Elsevier Science 🌐 English βš– 383 KB

Zn 2+ and Mg 2+ co-doped SrTiO 3 :Pr 3+ (with concentration up to 0.003) red phosphor material compositions were prepared by the solid state synthesis method. Phase and crystallinity of the synthesized materials were investigated by powder X-ray diffraction (XRD) and scanning electron microscopy (SE