One-Pot Hydrothermal Synthesis of SnMnS Nanosheets for Dielectric Energy Storage Applications

Recently, dielectric materials with high energy storagecapacity,low loss, and good temperature stability are highly desired for therapidly growing field of power electronics. In the current work, wehave investigated the change in electrical, optical, and dielectricproperties by varying the concentration of compositional elementsSn and Mn. We have prepared the Sn1-x Mn x S (0.1, 0.3, 0.5, 0.7, and 0.9)matrix by using the simple single-step hydrothermal method. The samplesshow that the reflectance percentage increased with the increase ofthe Mn amount in the composition. The samples exhibit narrow bandgap values, which further increase with the Mn content. The band gapvalue increases from 0.43 to 0.56 eV. The structural analysis showsthat the prepared samples are polycrystalline in nature, having SnSand MnS phases. Furthermore, the crystallite sizes increase with anincrease in Mn addition, whereas dislocation density and strain decreasesimultaneously. The refractive index is calculated from optical bandgap values by using the Dimitrov and Sakka equation. The morphologicalstudy reveals the uniformity in size and shape of the prepared compositionthroughout the sample. The presence of compositional elements Sn,Mn, and S is confirmed by EDX analysis. The electrical study revealsthat the sample shows good electrical properties, which increase withthe Mn contents. The dielectric behavior as a function of frequencyand temperature was investigated, and the parameters like dielectricconstant, AC conductivity, impedance spectroscopy, and electric moduluswere deeply analyzed. All the above optical, electrical, and dielectricproperties of the SnMnS matrix have potential use in the field ofelectronic and energy storage device applications.

Automated summary

In this work, the change in electrical, optical, and dielectric properties of materials by varying the concentration of Sn and Mn was investigated. The experimental results showed that with increasing Mn content, the reflectance percentage increased, and the band gap value also increased. The samples exhibited good structural and electrical properties. The findings of this study have potential applications in electronic and energy storage devices.