26 September 2016 Pyroelectric response of spray-deposited BaTiO3 thin film
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Pyroelectric photoresponse of aqueous spray deposited thin films containing BaTiO3 nano-crystals is reported. X-ray diffraction data indicate the presence of hexagonal BaTiO3 nano-crystals with ~20 nm crystalline domains in a matrix of some as yet unidentified nano-crystalline material. When the film is annealed at 600 C, the X-ray pattern changes significantly and indicates a conversion to one of the non-hexagonal phases of BaTiO3 as well as a complete change in the matrix. With suitable amplifier, the measured photoresponse was 40V/W. Ferroelectric hysteresis on a film with significant presence of hexagonal BaTiO3 shows saturated polarization which is about 5-times smaller than for the bulk tetragonal phase. A potential application is a patternable infrared detector for photonic and plasmonic devices, such as chip-scale spectral sensors.
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Robert E. Peale, Robert E. Peale, Isaiah O. Oladeji, Isaiah O. Oladeji, Evan M. Smith, Evan M. Smith, Vladimir Vasilyev, Vladimir Vasilyev, Sarmad Fawzi Hamza Alhasan, Sarmad Fawzi Hamza Alhasan, Hussain Abouelkhair, Hussain Abouelkhair, Dalibor Todorovski, Dalibor Todorovski, Martin Kimani, Martin Kimani, Justin W. Cleary, Justin W. Cleary, } "Pyroelectric response of spray-deposited BaTiO3 thin film", Proc. SPIE 9929, Nanostructured Thin Films IX, 99290Z (26 September 2016); doi: 10.1117/12.2237458; https://doi.org/10.1117/12.2237458

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