Abstract
Films of a complete series of solid-solution oxides, Ba1-X SrX WO4 (0≤X≤1), have been prepared on tungsten substrates in an electrolytic solution containing Ba2+ and Sr2+ ions by an electrochemical method at room temperature (25° C). X-ray diffraction and X-ray photoelectron spectroscopy analyses showed that a complete series of well-crystallized solid-solution oxides was formed even at room temperature. The Ba-to-Sr ratio in these films was larger than that in the starting solutions. Sr-rich films (X≥0.7) showed only blue emission at liquid-nitrogen temperature (-196° C), however, the other films did not luminesce at this temperature.
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