Improving Efficiency in Cs₂CuBiCl₆ Solar Cells through Minimizing Interface Defects

Conventional perovskite suffers from PV performance and stability issue. To address above issues, we have optimized the perovskite based solar cell through novel material. In this work we have utilized the Cs<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf>CuBiCl<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">6</inf> material as an active layer owing to its inexpensive cost, exceptional optical qualities, low-temperature coefficient, direct bandgap characteristics, and extraordinary stability. SCAPS-1d have been utilized for the simulation where interface defect density (IDD) of the active layer have been varied and best PV performance has been recorded. The study highlights the output of the Cs<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf>CuBiCl<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">6</inf> based PV cell, as the output of the result is remarkable that is about to PCE of 8.44%, V<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">OC</inf> 0.35 V, J<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">SC</inf> of 33.02 mA/cm<sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup>, and FF of 71.76% is obtained. Based on these results, Cs<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</inf>CuBiCl<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">6</inf> emerges as a highly prospective candidate for the advancement of PV technology.