Optimizing Charge Transport and Recombination in CH₃NH₃PbI₃ Perovskite Solar Cells Through Donor Density and Thickness Control

This work uses a CH-PSC structure to investigate the perovskite solar cells, therefore complementing the Climate Action and Affordable and Clean Energy. By means of SCAPS-1D simulations, the paper investigates how variation in donor density and active layer thickness affect important photovoltaic metrics like V<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">OC</inf>, J<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">SC</inf>, FF, and PCE. The results show the need of improving these parameters to increase solar cell efficiency, therefore aiding the development of reasonably priced and environmentally friendly energy sources. The paper shows that an ideal donor density reduces recombination and increases charge separation, hence improving V<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">OC</inf>, J<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">SC</inf>, and FF all of which are quite vital for high PCE. Concurrently, the thickness of the CH<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</inf>NH<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</inf>PbI<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</inf> layer has to be balanced to maximize light absorption without causing too strong recombination losses. Achieving the ideal balance between these elements will help to significantly increase the quantity of renewable energy in the global energy mix and hence care means of developing high-performance perovskite solar cells. Moreover, this study helps to define the direction of forthcoming solar technical developments. By means of varied perovskite compositions and alternate materials for electron and hole transport layers (ETL & HTL), the researchers hope to provide means to enhance the stability, scalability, and efficiency of perovskite solar cells. These kinds of developments promote technology to enable the development of sustainable energy systems, lowers of greenhouse gas emissions, and so limits of influence of climate change. Moreover in line with the aim of increasing the availability of clean energy solutions so enabling a sustainable and resilient future for all is the integration of these advances into scalable, low-cost manufacturing techniques.