Article abstract
Nature Materials 7, 735 - 740 (2008)
Published online: 1 August 2008 | doi:10.1038/nmat2244
Subject Categories: Ceramics | Optical, photonic and optoelectronic materials | Design synthesis and processing
Direct fabrication of metavanadate phosphor films on organic substrates for white-light-emitting devices
Tomohiko Nakajima1, Masahiko Isobe2, Tetsuo Tsuchiya1, Yutaka Ueda2 & Toshiya Kumagai1
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.
- Advanced Manufacturing Research Institute, National Institute of Advanced Industrial Science and Technology, Tsukuba Central 5, Higashi 1-1-1, Tsukuba, Ibaraki 305-8565, Japan
- Materials Design and Characterization Laboratory, Institute for Solid State Physics, University of Tokyo, Kashiwanoha 5-1-5, Kashiwa, Chiba 277-8581, Japan
Correspondence to: Tomohiko Nakajima1 e-mail: t-nakajima@aist.go.jp
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