Effect of Electrodeposition Time on Microstructure, Morphology, and Optical Properties of CIGS Films
DOI:
https://doi.org/10.35895/rf.v5i1.22Keywords:
CIGS, electrodeposition, thin film, electrodeposition timeAbstract
Solar cells based on crystalline structured materials such as CIGS (Coper Indium Gallium Selenium) have great potential to replace limited fossil energy sources. Optimization of CIGS solar cells was carried out using the electrodeposition method. Electrodeposition is carried out by dipping ITO and platinum substrate electrodes into a CIGS solution with a voltage of -2V for 5-15 minutes. Samples were characterized using XRD, SEM, and UV-Vis. Based on the XRD characterization results, the length of electrodeposition time increases the intensity in the hkl 211 and 112 planes, which indicates better CIGS crystallinity. The results of SEM characterization revealed that the CIGS particle size on the substrate surface can be deposited evenly, with the particle size getting smaller, namely 0.76, 0.68, and 0.32 μm. The SEM analysis also obtained the porosity values, namely 59.28, 64.05, and 68.34. The length of time for CIGS electrodeposition does not significantly affect the absorbance of the film in the UV light range, namely 300 - 350 nm. However, the CIGS band gap becomes larger, namely 3.66, 3.71, and 3.73 eV.
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