26 September 2016 Pyroelectric response of spray-deposited BaTiO3 thin film
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Abstract
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, Isaiah O. Oladeji, Evan M. Smith, Vladimir Vasilyev, Sarmad Fawzi Hamza Alhasan, Hussain Abouelkhair, Dalibor Todorovski, Martin Kimani, 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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