The two-dimensional electron liquid which forms between the band insulators LaAlO3 (LAO) and SrTiO3 (STO) is a promising component for oxide electronics, but the requirement of using single crystal SrTiO3 substrates for the growth limits its applications in terms of device fabrication.
Highly luminescent transparent films are producible on inexpensive noncrystalline substrates this approach also enables large-area processing of high-quality thin-film phosphors. Oriented thin films with a sharp and intense emission of Pr0.002(Ca0.6Sr0.4)0.997TiO3 were successfully obtained on a glass substrate modified with a seed layer. A densely packed monolayer film of Ca2Nb3O10 nanosheets was prepared by the Langmuir−Blodgett (LB) method, where hybridization of the cationic molecules and the Ca2Nb3O10 nanosheets produced stable LB films with large-area processability. Here, we report the efficient fabrication of highly oriented luminescent perovskite oxide films on a glass substrate using a monolayer film of oxide nanosheets as the seed layer. As yet, however, the fabrication of high-quality luminescent thin films on a glass substrate remains challenging for practical implementation. Oxide phosphors are attractive materials for various applications in optoelectronic devices due to their high chemical stability and efficient luminescent characteristics.
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