Design and Simulation of 7% Efficient Lead-Free Perovskite Single Junction Solar Cell
Nikhil Shrivastav, Savita Kashyap, Rahul Pandey, Jaya Madan
Abstract
Due to the low cost, low-temperature coefficient, direct bandgap, long-term stability, and high absorption coefficient, lead-free perovskite materials are the most promising materials for solar cell. Thus, in this work, a single-junction solar cell based on cesium tin-germanium triiodide solid solution perovskite (CsSn <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0.5</inf> Ge <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0.5</inf> I <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</inf> ) material (1.5 eV) has been used to design solar cell. To assist the light generated charge carrier flow PCBM: C <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">60</inf> and Spiro-OMeTAD are utilized as ETL and HTL respectively. Using the SCAPS-1D tool, the cell is tuned for maximum conversion efficiency (7%) by collectively adjusting the thickness and donor density of the perovskite (CsSn <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0.5</inf> Ge <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">0.5</inf> I <inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</inf> ) layer.