Abstract
• The synthesis of a stable BaKFeWO 6 double perovskite from BaWO 4 & KFeO 2 two non-perovskites materials. • Semiconducting property and NTC thermistor applications. • The study of I-V characteristics confirms the Ohmic nature with a low leakage current. • The study of UV visible spectrum provides the energy bandgap of 3.16 eV; which was found suitable for some optoelectronic devices. In this paper, the synthesis (solid-state reaction) and characterization (structural, electrical, and optical) of K + /Fe +3 co-doped inorganic BaWO 4 (i.e., BaKFeWO 6 ) double perovskite are reported. The x-ray diffraction (XRD) profile suggests an orthorhombic crystal symmetry with an average crystallite size of 95 nm and a lattice strain of 0.145 %. The incorporation of the potassium/iron ions on both sides of the barium tungstate is confirmed from RAMAN while microstructure (grain/grain boundary) analysis by scanning electron microscopy (SEM). The study of energy-dispersive X-ray spectroscopy (EDX) confirms the presence of all constituent elements with both weight and atomic percentage. The study of dielectric as a function of both frequency (1 kHz −1 MHz) and temperature (25 °C – 500 °C) insights into the structure, grain, grain boundary, transport properties and charge storage capacities. Modulus study suggests a non-Debye relaxation mechanism while impedance analysis suggests a negative temperature of coefficient of resistance (NTCR) behavior. The temperature-dependent dc conductivity follows Arrhenius's relation while frequency-dependent ac conductivity obeys Jonscher's power law and confirms the presence of the thermally activated conduction mechanism. The variation of the resistance with temperature confirms the character of the NTC thermistor. The I-V study supports the low leakage current and Ohmic character of the sample. The study of UV visible spectrum provides band-gap energy of 3.16 eV for some device applications.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
