R. Javaid, H. Anwar, Y. Jamil
Sep 1, 2020
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Journal
Journal of Ovonic Research
Abstract
Copper Iodide (CuI) is a p-type semiconductor and is significant owing to vital applications especially in semiconductor electronic devices. Recently, in Perovskite solar cells CuI as hole transport material (HTM) reveals a promising efficiency over 21.0 % which is highest among the reported efficiency at room temperature. In this research, CuI nanostructures were prepared by green method using sugar beet juice with different concentrations (5 ml, 10 ml, 15 ml and 20 ml). In this method, sugar beet juice was used as reducing and capping agent thus controls particle size. The as prepared samples were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), Energy dispersive X-ray spectroscopy (EDX) and UV-vis spectroscopy. The XRD analysis confirmed the pure cubic structure of copper iodide nanostructures and average crystallite size was found to decrease with an increase in the concentration of beet juice in the range of 43 nm to 31 nm. SEM showed the morphological transformation. SEM images showed that CuI nanostructures were triangular like shape at lower concentration but at higher concentrations nanosheets like shape were observed. EDX confirmed the presence of iodide and copper with proper composition. UV-visible spectroscopy results revealed the variation of band gap energy with increasing concentration of beet juice. Morphological transformation can be critical in optoelectronic devices regarding charge transfer at different interfaces.