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Synthesis and cathodoluminescent properties of Lu3(Al,Ga)5O12:Tb3+ with and without niobium-doped TiO2 coating

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Abstract

(Lu0.95Tb0.05)3(Al0.80Ga0.20)5O12 (LuAGG:Tb) phosphor is synthesized by a high-temperature solid-state reaction, and a thin layer of niobium-doped TiO2 (NTO) is deposited on the phosphor particles by coprecipitation-assisted solvothermal synthesis. The crystal structure, micromorphology, chemical bonding, and cathodoluminescent (CL) properties of both the uncoated and NTO-coated phosphors are determined. The phosphor powders possess a single phase, and the average diameter of the particles is about 3 μm. NTO nanoparticles with the anatase crystal structure are connected to the phosphor particles electrostatically. Both types of phosphors exhibit the characteristic emission spectrum of Tb3+ under electron excitation. The CL intensity decreases, whereas the resistance to luminance saturation and degradation increases with the coating.

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Acknowledgments

The work was financially supported by the Natural Science Fund Project in Jiangsu Province of China (BK2012869), City University of Hong Kong Applied Research Grant (ARG) No. 9667104, and City University of Hong Kong Strategic Research Grant (SRG) No. 7004188.

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Authors and Affiliations

  1. Department of Microelectronics, Nanjing College of Information Technology, Nanjing, 210046, China

    Xian-Zhong Zhu

  2. School of Materials Science and Engineering, Southeast University, Nanjing, 211189, China

    Cheng-Lin Chu

  3. Department of Physics and Materials Science, City University of Hong Kong, Kowloon, Hong Kong, China

    Paul K. Chu

Authors
  1. Xian-Zhong Zhu
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  2. Cheng-Lin Chu
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  3. Paul K. Chu
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Correspondence to Xian-Zhong Zhu.

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Zhu, XZ., Chu, CL. & Chu, P.K. Synthesis and cathodoluminescent properties of Lu3(Al,Ga)5O12:Tb3+ with and without niobium-doped TiO2 coating. J Sol-Gel Sci Technol 77, 355–360 (2016). https://doi.org/10.1007/s10971-015-3861-7

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  • DOI: https://doi.org/10.1007/s10971-015-3861-7

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