Improving the Photoelectric Conversion Efficiency of Cs₂TiBr₆-Based Perovskite Solar Cells Using a Theoretical Simulation Method

Abstract

While lead-based perovskites stand out as a highly promising material for solar cells, there remains a notable concern related to the possibility of lead leakage. This study utilized the solar cell simulation software SCAPS-1D to explore strategies for enhancing the efficiency of lead-free perovskite solar cells (PSCs) and to elucidate the corresponding theoretical mechanisms. A model of the n–i–p FTO/TiO2/Cs2TiBr6/P3HT/Au structure was developed. Employing various modification strategies in experimental setups, the impact of crucial parameters on device performance was investigated by manipulating specific variables. This systematic approach allowed for the identification of the most optimal parameter configuration for enhanced device performance. The device performance was thoroughly examined by evaluating key parameters such as transport layer mobility, energy-level matching properties, interface defect concentration, interface capture cross-section area, and perovskite defect density/thickness. The investigation revealed that a substantial enhancement in device performance can be achieved by minimizing the defect density in the perovskite, augmenting the mobility of the transport layer, refining the energy-level alignment with the perovskite, and reducing the interface capture area. The device simulation ultimately resulted in a conversion efficiency of 16.86%. This study provides valuable guidelines for the research and development of novel lead-free double PSCs.

Electrospun Nanofiber-Based Electrolytes for Next-Generation Quasi-Solid Dye-Sensitized Solar Cells: A Review

“…The continuous use of fossil fuel produces significant amounts of environmentally harmful gases such as SO x , NO x , and CO 2 that lead to a gradual increase of global temperature . Moreover, within 200 years, most of them may be completely depleted. − The impending depletion of natural resources and their undesirable impact on the environment have encouraged many researchers and scientists to focus on an alternative energy source that should be reliable, cost-effective, abundant in nature, renewable, and environmentally friendly. For the last few decades, the use of several renewable energy sources like hydropower, tidal energy, wind energy, solar energy, biomass-derived fuels, and geothermal energy has been attempted. − Among all these, the solar irradiation-based dye-sensitized solar cell (DSSC) has become the most prominent one. − One of the recent studies estimated that if 0.2% of the Earth’s surface is covered with DSSCs having an efficiency of 5%, the world’s overall power demands will be fulfilled …”