Zifeng Qiu et al 2007 Nanotechnology 18 495705 doi:10.1088/0957-4484/18/49/495705
Zifeng Qiu, Yuanyuan Zhou, Mengkai Lü1, Juan Zhou, Aiyu Zhang, Zhongsen Yang and Qian Ma
Show affiliationsNovel Li0.9Y(0.9−x−y)Zr0.1O2:Eux3+, Ry3+ (R = Ce,Bi) red nanocrystal phosphors were synthesized by the sol-combustion process at 800 °C. XRD and TEM were used to evaluate the crystallinity and the morphological characterization of the samples. The photoluminescence properties and lifetime of the obtained phosphor nanoparticles were measured using an Edinburgh FLS920 at room temperature. The result showed that the luminescence intensity of Li0.9Y(0.9−x−y)Zr0.1O2:Eux3+ was increased by Bi3+ and Ce3+ by 900% and 600%, respectively. The emission mechanism and sensitization mechanism of Bi3+ and Ce3+ on Eu3+ emission intensity were described and explained in detail in this work. The high bright and color-uniform fluorescence images of the doped samples with short luminescence decay times (nanosecond level) confirmed the potential applications of the phosphors in light-emitting diodes and display devices.
81.16.-c Methods of nanofabrication and processing
68.37.Lp Transmission electron microscopy (TEM)
81.07.Bc Nanocrystalline materials
Condensed matter: electrical, magnetic and optical
Issue 49 (12 December 2007)
Received 6 August 2007, in final form 2 October 2007
Published 2 November 2007
Zifeng Qiu et al 2007 Nanotechnology 18 495705
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