ABSTRACT

In this paper, we report Tin Selenide (SnSe) nanoparticles preparation through co-precipitation method and characterised by UV–Vis spectroscopy, scanning electron microscopy, Fourier transforms infrared spectroscopy, X-ray diffraction, EDX spectrum, photovoltaic and Supercapacitor performance. XRD patterns indicate that the prepared SnSe nanoparticles exist in the orthorhombic phase. The SEM and TEM image show that nanoparticles exhibit spherical shapes with high agglomeration. The UV-Visible spectrum recorded in the range of 200–800 nm, show peaks at 260 nm, 300 nm, and 350 nm while direct energy bandgap lies between 1.4 eV and 1.8 eV and indirect energy bandgap lies between 1.5 eV to 1.6 eV. The obtained SnSe counter electrodes (CEs) showed good electrocatalytic activity in the redox reaction of the I⁻/I3⁻. The Dye-sensitised solar cells (DSSC) of SnSe with molar ratios (1:1), (2:1), and (3:1) as showed good photovoltaic performances in comparison to platinium (Pt) counter electrode (CE). The higher specific capacitance value 1335 F/g of SnSe (3:1) electrode compare to the SnSe (1:1) and (1:2) electrodes proves the stability of SnSe (3:1) for supercapacitor performance.

摘要

在本文中，我们报道了通过共沉淀法制备硒化锡 (SnSe) 纳米颗粒，并通过紫外-可见光谱、扫描电子显微镜、傅里叶变换红外光谱、X 射线衍射、EDX 光谱、光伏和超级电容器性能进行了表征。XRD图谱表明制备的SnSe纳米颗粒以正交晶相存在。SEM 和 TEM 图像显示纳米颗粒呈现出具有高团聚的球形。在 200–800 nm 范围内记录的紫外-可见光谱在 260 nm、300 nm 和 350 nm 处显示峰值，而直接能带隙位于 1.4 eV 和 1.8 eV 之间，间接能带隙位于 1.5 eV 至 1.6 eV 之间。获得的 SnSe 对电极 (CEs) 在 I ^- /I3的氧化还原反应中表现出良好的电催化活性^-。与铂 (Pt) 对电极 (CE) 相比，摩尔比 (1:1)、(2:1) 和 (3:1) 的 SnSe 染料敏化太阳能电池 (DSSC) 显示出良好的光伏性能。与 SnSe (1:1) 和 (1:2) 电极相比，SnSe (3:1) 电极的比电容值 1335 F/g 更高，这证明了 SnSe (3:1) 对超级电容器性能的稳定性。