Synthesis and Characterization of NaBiS₂ for Application in Energy Conversion Devices

The use of solar energy in photovoltaic form is considered a promising strategic alternative for green and sustainable development. In this way, many materials have been studied over decades. Perovskites are materials that have aroused great interest in the scientific community for providing efficiencies above 25% [1]. However, these inorganic materials are unstable and do not provide durability to the manufactured devices, in addition to using lead, which is toxic. The new trend is to modify these structures looking for greater stability or to look for non-toxic materials [2]. In addition to perovskites, chalcogenides, kasterites and ternary alloys are potential candidates [3]. In this work we investigated the chalcogenide, NaBiS2, using the hydrothermal route, known as a simple methodology, varying the sulfur precursors. The films were obtained using the spin coating deposition technique. The developed materials were investigated by various XRD, UV-Vis, FTIR, XPS and SEM techniques. The solar cells will be manufactured to evaluate the quality of the materials and verify the potential use of the developed materials.<br/>Acknowledgements:<br/>BYD for financial support<br/>References:<br/>[1] Parida, B., Iniyan, S., Goic, R. Renewable and Sustainable Energy Reviews, 15-3, 1625-1636, 2011.<br/>[2] Nayak, P. K., Mahesh,S., Snaith,H. J., Cahen, D. Photovoltaic solar cell technologies: analysing the state of the art. Nature Reviews Materials, 4,269–285, 2019.<br/>[3] Sun, J., & Singh, D. J. Electronic properties, screening, and efficient carrier transport in NaSbS2. Physical Review Applied, 7(2), 024015, 2017.