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In the present work, GdMnO3 samples were synthesized by acetate precursor based modified sol–gel method with different sintering temperatures. XRD was performed to understand the structural properties of the samples which imply that samples possess single phasic nature with orthorhombic structure. UV–vis absorption spectrum was analyzed using Tauc's relation which gives a direct band gap of ∼ 0.98 eV for the GdMnO3 sample sintered at 1100 °C. Variation in dielectric and impedance with sintering temperature has been discussed in the context of oxygen vacancies and ZDE mechanism. [ABSTRACT FROM AUTHOR]

In the present work, GdMnO3 samples were synthesized by acetate precursor based modified sol–gel method with different sintering temperatures. XRD was performed to understand the structural properties of the samples which imply that samples possess single phasic nature with orthorhombic structure. UV–vis absorption spectrum was analyzed using Tauc's relation which gives a direct band gap of ∼ 0.98 eV for the GdMnO3 sample sintered at 1100 °C. Variation in dielectric and impedance with sintering temperature has been discussed in the context of oxygen vacancies and ZDE mechanism. [ABSTRACT FROM AUTHOR]

We have studied the performance of dye-sensitized solar cells by employing natural dye "anthocyanins" extracted from the tomato slurry as a sensitizer for the TiO2/CuO photoanode. The extracts were anchored on TiO2/CuO films deposited on an ITO substrate which was used as a photoanode. The dye adsorbed TiO2/CuO films electrode, the copper plate as a counter electrode, and iodolyte as an electrolyte were assembled into DSSCs. The conversion efficiency of the DSSCs was found to be 2.96% with a VOC of 0.615 V, JSC of 6.6 mA/cm2, and an FF of 0.73. This work highlights the use of contribution of the tomato slurry as a natural sensitizer to enhance the efficiency of DSSCs. [ABSTRACT FROM AUTHOR]