TAGRA 2024

The development of efficient, lead-free tandem perovskite solar cells (TPSCs) has become a vital area of study in the quest for sustainable and high-performance photovoltaic technology. An essential challenge in enhancing the power conversion efficiency (PCE) of these devices is the optimisation of the hole transport layer (HTL), which is vital for charge collection and device stability. In this paper, the findings of simulation-based investigations carried out on the perovskite tandem (top and bottom subcells consisting of perovskites and silicone layer) are presented in the current research study. This study examines the design and fabrication of molybdenum trioxide (MoO3) as an effective hole transport layer (HTL) for lead-free all-tandem perovskite solar cells for top layer subcells. The MoO3 is chosen for its favorable electrical properties, transparency, and chemical stability, making it an ideal choice for improving the overall efficiency of TPSCs and serving as the top cell. The lower cell utilised silicone. The maximum cell efficiency achieved is 23.59%, while the minimum cell efficiency is 17.48%, both under the illumination of the AM 1.5 G spectrum for the simulations. The synthesised MoO3-based hole transport layers are incorporated into lead-free perovskite solar cells, and their performance is evaluated for structural, optical, and electrical properties. Our research demonstrates a significant enhancement in the power conversion efficiency of lead-free tandem devices, highlighting the potential of MoO3 as a beneficial HTL material for the advancement of sustainable solar cell technology. This study advances the growing body of research aimed at creating efficient, lead-free, and sustainable perovskite-based solar cells with improved power conversion efficiency (PCE).