Bulk nanostructured perovskites of La0.67-xLi3xTiO3 (LLTO) were prepared by using thermally ball-grinding from compounds of La2O3, Li2CO3 and TiO2. From XRD analysis, it was found that LTTO materials were crystallized with nano-size grains of an average size of 30 nm. The bulk ionic conductivity was found strongly dependent on the Li+ composition, the samples with x = 0.11 (corresponding to a La0.56Li0.33TiO3 compound) have the best ionic conductivity, which is ca. 3.2 x 10-3 S/cm at room temperature. The LLTO amorphous films were made by electron beam deposition. At room temperature the smooth films have ionic conductivity of 3.5 x 10-5 S/cm and transmittance of 80%. The optical bandgap of the films was found to be of 2.3 eV. The results have shown that the perovskite La0.56Li0.33TiO3 thin films can be used for a transparent solid electrolyte in ionic battery and in all-solid-state electrochromic devices, in particular.
Belous, A.G., Novitskaya, G.N., Polyanetskaya, S.V., and Yu. I. Gormikov (1987), Izv. Akad. Nauk, USSR, Neorg. Mater. vol. 23, pp. 470-479.
Inaguma, Y., Chen, L., Itoh, M., Nakamura, T., Uchida, T., Ikuta, M., and Wakihara, M. (1993), Solid State Commun., vol. 86, pp. 689-671.
Belous, A.G. (2001), Journal of the European Ceramic Society, vol. 21, pp. 1797-1800.
Bonhke, O., Emerym J., and Fouquetm J.L. (2003), Solid State Ionics, vol.158, pp. 119-132.
Li, J., Wen, Z., Xu, X., and Zhu, X. (2005), Solid State Ionics, vol. 176 , pp. 2269-2273.
Ahn, J.K. and Yoon, S.G. (2004), Electrochimica Acta, vol. 50 , pp. 371-374.
Furusawa, S., Tabuchi, H., Sugiyama, T., Tao, S., and Irvine, J.T.S. (2005), Solid State Ionic, vol. 176 , pp. 553-558.
Ahn, J.K. and Yoon, S.G. (2005), Electrochem. Solid-State Lett, vol. 8(2), A75-A79.
Li, C.L., Zhang, B., and Fu, Z.W. (2006) , Thin Solid Films, vol. 515, pp 1886-1898.
Dinh, N.N., Long, P.D., and Trong, L.D. (2004), Commun. in Phys., Vol. 14/2, pp. 90-96.
Cullity, B.D. (1978), Elements of X-Ray diffraction, 2nd ed., p.102, Addison-Wesley Publishing Company, Inc., Reading, MA.
Dinh, N.N., Ngoc, N.T.B., and Trong, L.D. (2006), VNUH J. Sci., Mathematics-Physics, Vol. 22/1, pp. 54-61.
Willardson, R.K. and Beer, A.C. (1967), Semiconductors and Semimetals, Vol. 3 Optical properties of III-V compounds (Chapter 6), Acad. Press, New York – London.
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