Theoretical analysis of non-fullerene acceptor based bulk heterojunction organic solar cell with copper based Hole Transport Layers

Abstract

The enhanced efficiency and stability of non-fullerene acceptor bulk heterojunction organic solar cells (NFA-BHJ-OSCs) in comparison to traditional fullerene acceptor solar cells, have drawn significant attention. The primary aim of this study is to examine the impact of various copper based Hole Transport Layers (HTLs) to increase the electronic conductivity of the cell. It is anticipated that using proper HTL and optimizing its specific parameters will result in the highest efficiency within these structural configurations. The performance of bulk heterojunction organic solar cell based on a Non-Fullerene Acceptor has been investigated using SCAPS-1D. The study dealt with the utilization of TiO₂ as the ETL and CuSbS${}_2$, CuO, CFTS, CBTS, CuI, Cu₂O as the HTL and found, PBDB-T:ITIC absorber layer surpasses other absorber layers due to its superior optical and electrical properties, when coupled with Cu₂O as HTL and TiO₂ as ETL. The changes into the absorber layer thickness, defect density, and doping level are carried out numerically to determine their effect on device performance and efficiency. We determined the Short Circuit Current Density, Open Circuit Voltage, Fill Factor, and Power Conversion Efficiency (PCE) to be 19.38 mAcm⁻², 1.0893 V, 78.14%, and 16.50%, respectively, based on our optimization efforts.