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Research Paper | Physics | Volume 15 Issue 7, July 2026 | Pages: 1202 - 1208 | India
Electric and Optical Properties of Synthesised Nano-Phase Stannic Dioxide Semiconductor
Abstract: Nanoparticles of stannic dioxide semiconductor were synthesized chemically, and annealed at 120°C, 150°C and 200°C. FTIR spectra showed that in the crystal, Sn-O-Sn bending vibrations band spans 419-487 cm-1 and Sn-O asymmetric stretching spans a band of 630-640 cm-1. The chemical composition and morphology were studied by SEM-EDS. These indicated successful synthesis. Its microstructural studies were performed and published earlier. Effect of impurity on magnetic properties were also reported. However, optical and electrical studies were done by us later, and here we report the novel observations. We measured the specific capacitance of samples by cyclic voltammetry using a three-electrode configuration at a scan rate of 10 mV s-1, showed that the samples annealed at 150 °C and 200 °C exhibited values of 113.5 F g-1 and 327.3 F g-1, respectively. These values are significantly higher than approximately 1.6 F g-1 measured under comparable electro chemical conditions, and are novel for coprecipitation method. To understand the origin of this enhancement, the structural and electronic properties of the samples were examined using UV?Visible absorption spectroscopy. The optical band gaps, determined from Tauc plots of samples at the three annealing temperatures, were observed to decrease from 4.40 eV for the sample annealed at 120 °C to 3.61 eV for the sample annealed at 200 °C. This may be due to an increase in defect states, such as oxygen vacancies, and possible modifications in crystallinity and particle size induced by annealing, microstructure and electronic structure of SnO2 nanoparticles.
Keywords: Stannic-dioxide nanoparticle, optical band gap, specific capacitance, Annealing Temperature
How to Cite?: Sujeet Kumar, B. C. Rai, "Electric and Optical Properties of Synthesised Nano-Phase Stannic Dioxide Semiconductor", Volume 15 Issue 7, July 2026, International Journal of Science and Research (IJSR), Pages: 1202-1208, https://www.ijsr.net/getabstract.php?paperid=SR26714083546, DOI: https://dx.doi.org/10.21275/SR26714083546