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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Synthesis of perovskite [KNbO 3 ] 0.9 [BaNi 0.5 Nb 0.5 O 3-δ ] 0.1 by solution combustion

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C. C. Nascimento ; R. E. S. Bretas ; M. R. Morelli
Total Authors: 3
Document type: Journal article
Source: Cerâmica; v. 65, n. 373, p. 45-53, Jan. 2019.

Abstract The development of visible-light-absorbing ferroelectric perovskite materials, particularly KBNNO - [KNbO3]0.9[BaNi0.5Nb0.5O3-δ]0.1 (band-gap Eg= 1.39 eV), has provided encouragement for the use of such materials in photoactive layers. When applied in photovoltaic devices, these materials might generate above-bandgap photovoltages and a more efficient separation of charge carriers. The synthesis of this oxide as a powder with high surface area might be a strategy to further incorporation in solar cells composed of low-temperature processing materials. This work reports for the first time the application of the solution combustion as an alternative route for the synthesis of KBNNO. Characterization by XRD, SEM, EDS, TG/DSC and diffuse reflectance UV-vis spectroscopy confirmed the success of the synthesis. The optical properties showed the visible-light absorption contribution and band-gap close to the ideal magnitude for solar applications. (AU)

FAPESP's process: 15/23329-3 - Development of polymeric nanocomposites for different applications in energy
Grantee:Rosario Elida Suman Bretas
Support type: Regular Research Grants
FAPESP's process: 16/03667-4 - Electrospinning of ceramic nanofibers for polymeric nanocomposites
Grantee:Rosario Elida Suman Bretas
Support type: Scholarships abroad - Research
FAPESP's process: 06/61008-5 - Nanostructure polymeric systems: processing and properties
Grantee:Rosario Elida Suman Bretas
Support type: Research Projects - Thematic Grants