THE INVESTIGATION OF THE MODIFICATION EFFECT OF THE SYNTHESIS AND SULFURIZATION PROCESS ON CZTS THIN-FILM CRYSTAL GROWTH

• Main Author: Setyo Nugroho, Harbi
• Format: Theses
• Language: Indonesia
• Online Access: https://digilib.itb.ac.id/gdl/view/57432
• Institution: Institut Teknologi Bandung

An investigation of the effect of modified synthesis and sulfurization process on crystal growth of CZTS thin films has been carried out. CZTS is a an attractive material to be developed as an absorber layer in thin film solar cells because of its various optoelectronic advantages and the high-abundance and non-toxic constituent materials. However, the CZTS thin film remains unable to achieve its best performance due to various problems such as poor crystal growth, secondary phases, and small grain sizes. In this study, optimization efforts were carried out by modifying the duration of sulfurization. The sulfurization process was carried out at a temperature of 550°C with the duration of sulfurization varied into 2, 5, 8, and 10 minutes. The characterization of the CZTS thin-film using X-Ray Diffractometer (XRD), Raman Spectroscopy, and Scanning Electron Microscope (SEM) was carried out to analyze the crystallinity, phase formation, and morphology of the CZTS thin-film. Meanwhile, the performance test of CZTS thin-film solar cells was carried out by measuring I-V. The increase in sulfurization duration was directly proportional to the increase in the quality of the CZTS thin-film which showed the formation of more single-phase kesterite without the presence of a secondary phase and the growth of CZTS grain size. The best CZTS thin-films were obtained with a sulfurization duration of 10 minutes with the largest grain size, single CZTS kesterite phase, and no secondary phase. Meanwhile, the efficiency of the device also increases linearly with increasing sulfurization duration. The best CZTS thin-film solar cell device was obtained using a sulfurization duration of 10 minutes with an efficiency value of 0.37%.