Engineering the band gap of LaCrO3 doping with transition metals (Co, Pd, and Ir)

Exceptional properties such as dielectric, ferroelectric, piezoelectric, magnetic, catalytic, and photovoltaic of perovskite materials open new doors to many groundbreaking discoveries for unique device ideas. These materials properties are inherited from their crystal structures; therefore, the fea...

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Bibliographic Details
Published in:Journal of materials science 2018-03, Vol.53 (5), p.3544-3556
Main Authors: Polat, O., Durmus, Z., Coskun, F. M., Coskun, M., Turut, A.
Format: Article
Language:English
Subjects:
Automotive parts
Catalytic converters
Characterization and Evaluation of Materials
Chemistry and Materials Science
Classical Mechanics
Cobalt
Crystal structure
Crystallography and Scattering Methods
Crystals
Dielectric properties
Doping
Electronic Materials
Energy gap
Exhaust systems
Ferroelectric materials
Ferroelectricity
Infrared spectra
Magnetic properties
Material properties
Materials Science
Palladium
Perovskite structure
Perovskites
Piezoelectricity
Polymer Sciences
Scanning electron microscopy
Silicon substrates
Solid Mechanics
Solid oxide fuel cells
Thin films
Transition metals
X-ray diffraction
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Summary:Exceptional properties such as dielectric, ferroelectric, piezoelectric, magnetic, catalytic, and photovoltaic of perovskite materials open new doors to many groundbreaking discoveries for unique device ideas. These materials properties are inherited from their crystal structures; therefore, the features can be tuned via varying details of the crystal structures. In the literature, LaCrO 3 (LCO) is one those mostly examined perovskites for various purposes such as solid oxide fuel cells, catalytic converters, and sensors. In the present study, the band gap tuning of LCO was investigated via doping a transition element such as cobalt (Co), palladium (Pd), and iridium (Ir) into Cr atom. The synthesized doped and un-doped LCO powders were characterized by infrared spectra (IR) and X-ray diffraction (XRD). Scanning electron microscopy (SEM) was employed to study the surface topography of LCO and doped LCO thin films on silicon substrates. The band gaps of the LCO and doped LCO films were scrutinized using a UV–Vis spectrometer. Our study has shown that the band gap of LCO was successfully lowered from 3.4 eV to 2.66 eV and can be engineered via substitution at various mol% of transition elements (Co, Pd, Ir) onto B-site Cr atom in the LCO perovskite structure.
ISSN:0022-2461
1573-4803
DOI:10.1007/s10853-017-1773-3