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Direct fabrication of metavanadate phosphor films on organic substrates for white-light-emitting devices

Nature Materials volume 7, pages 735–740 (2008)Cite this article

Abstract

White-light-emitting materials have attracted considerable attention because of their applications, such as large-surface emitting devices. Inorganic phosphor films are expected to be applied to these devices because of good chemical stability; however, a substantial reduction of fabrication temperature is required for future industrial uses such as lighting materials fabricated onto flexible organic substrates. Here we show the optical properties of white-light-emitting metavanadate phosphors, AVO3 (A: K, Rb and Cs), and we report a new direct fabrication process for RbVO3 films onto flexible polyethylene terephthalate (PET) substrates by means of a vacuum ultraviolet irradiation using an excimer lamp. In addition, the (Ca,Sr,Pr)TiO3/a-Al2O3/RbVO3/PET heterostructure prepared by an excimer-laser-assisted metal–organic deposition process has demonstrated the possibility of colour modification for RbVO3 films on PET. Our findings suggest new possibilities for further development of large-surface emitting lighting devices.

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Figure 1: Optical properties of AVO3.
Figure 2: Structural and optical properties for RbVO3 films on PET fabricated by means of excimer-lamp illumination.
Figure 3: Crystal morphology and luminescence of RbVO3 films on PET.
Figure 4: Luminescent colour modification for RbVO3 films fabricated by excimer-lamp illumination.

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Acknowledgements

The authors thank M. Kanesato and S. Ishibe for measuring the photoluminescence property of the materials and for discussions.

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Authors and Affiliations

  1. Advanced Manufacturing Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba Central 5, Higashi 1-1-1, Tsukuba, Ibaraki 305-8565, Japan

    Tomohiko Nakajima, Tetsuo Tsuchiya & Toshiya Kumagai

  2. Materials Design and Characterization Laboratory, Institute for Solid State Physics, University of Tokyo, Kashiwanoha 5-1-5, Kashiwa, Chiba 277-8581, Japan

    Masahiko Isobe & Yutaka Ueda

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  1. Tomohiko Nakajima
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Correspondence to Tomohiko Nakajima.

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Nakajima, T., Isobe, M., Tsuchiya, T. et al. Direct fabrication of metavanadate phosphor films on organic substrates for white-light-emitting devices. Nature Mater 7, 735–740 (2008). https://doi.org/10.1038/nmat2244

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