Unveiling the impact of PC61BM concentration on perovskite solar cell performance

Abstract

A detailed fabrication method is represented for perovskite solar cells, incorporating various materials and processes based on glove box-free sol-gel deposition routes. Key components include NiOx x HTL, PC61BM 61 BM ETL, BCP HBL, and CH3NH3PbI3 3 NH 3 PbI 3 perovskite absorber. Results reveal a significant influence of PC61BM 61 BM concentration on device efficiency, with champion cells exhibiting optimized VOC, OC , JSC, SC , and FF values at a specific concentration. Statistical analysis of 38 devices confirms the reproducibility and consistency of this concentration, yielding a PCE of 18.2 %. This study investigates a gap in the literature by clarifying the impact of PC61BM 61 BM solution concentration as a sol-gel deposited electron transport layer. By identifying the optimal concentration and its role in improving device efficiency and reproducibility, investigation contributes to advancing the field of fully solgel-based perovskite solar cell technology.