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CaFe2O4 (CFO) is an oxide semiconductor being usable for a photocathode, but its single crystal is so far grown only by a high-pressure bulk synthesis method. Using pulsed-laser deposition, we have obtained the (010)-oriented CFO films on TiO2 (100) substrates. The epitaxial structure included twin domains with 1.5° tilting from the surface normal and sixfold domains with in-plane rotations of ±70°...
A film of CH3NH3PbI3 of thickness 1200nm is fabricated on fluorine doped tin oxide coated glass. The crystal structure of the material has been determined by X-ray diffraction method which shows that CH3NH3PbI3 is crystallized in the tetragonal phase with space group I4/mcm. The dielectric relaxation of the CH3NH3PbI3 thin film is investigated in the frequency range from 42Hz to 4.8MHz. The frequency...
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