Numerical assessment of high-efficiency lead-free perovskite solar cells

Solar energy is a topic that is very popular when one thinks of producing electricity from renewable sources. It is one of the most popular sources of energy and the hard work done by researchers made it possible to look for different materials that can be used for making the solar cell. Right now, Perovskite solar cells (PSCs) is also attracting a lot of curiosity of the researchers because of their lowcost, rapid increase in the Power conversion efficiency i.e. (PCE) in a very short time and high opencircuit voltage but the dominance of Lead-Halide Perovskite Solar Cell is huge irrespective of the fact that Lead is toxic in nature. That's where the Tin based perovskite solar cell comes to the light. That's why in this research paper the device discussed in this paper is made to be non-toxic and will not harm nature along with improved efficiency and better results. A model is presented here having CH3NH3SnI3 (Perovskite layer) as the absorber which is non-toxic. This model consists of the following different layers ITO (Indium Tin Oxide), ZnO (Zinc Oxide) as an electron transporting layer (ETL), CH3NH3SnI3 (Perovskite layer), poly(3,4-ethylenedioxythiophene) also called PEDOT as a Hole transporting layer (HTL) and Gold (Au) as a back contact. In this work we are basically focusing on two basic points one is to make it nontoxic and the other is to increase its efficiency. For simulation and designing purposes SILVACO TCAD software is used and an efficiency of 20.06% was obtained. This research will also lead young researchers like us to work on increasing its efficiency along with making the Perovskite solar cell non-toxic. It will also enhance the efficiency of the solar cell which will help our society to meet its energy requirements. (c) 2021 Elsevier Ltd. All rights reserved. Second International Conference on Aspects of Materials Science and Engineering (ICAMSE 2021).