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Organic-inorganic hybrid materials doped with Eu3+, Tb3+ La3+ and lithium ions were produced by sol-gel method using Tetraethyl orthosilicate and poly(methyl methacrylate), ethyl methacrylate, butyl methacrylate, ethyl acetyloacetate as inorganic and organic precursors. Morphology and structure of the hybrids heated at 125°C were characterized by Scanning electron microscopy equipped with Energy dispersive X-ray spectroscopy (SEM/EDS, X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR), 29Si MAS Nuclear Magnetic Resonance. In all the hybrids, photoluminescence emissions from (5D3), 5D4 →7FJ and 5D0→7FJ transiSuperscript texttions of Eu3+ and Tb3+ ions were revealed.

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Li-ion conductive organic-inorganic hybrid electrolytes with the ionic conductivities of 10 -3 -10 -2 Scm [3][4][5]. Higher ionic conductivities can usually be achieved by using additives of the small organic molecule plasticizer or synthesizing polymer gel electrolytes, but also results in decrease of mechanical stability, while cross-linked polymer electrolytes are mostly the typical glassy polymers with high brittleness [6][7][8][9]. In the last years, sol-gel derived organic-inorganic hybrids have attracted a great deal of attention for the solid electrolyte applications [10]. In this work, lithium salt doped organic -inorganic hybrid electrolytes based on TEOS and organic additives were investigated for morphology, structural properties and ionic conductivity with aim to determine their potential to be useful as transparent solid electrolytes for the room-temperature applications.

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