High–Performance Perovskite Solar Cell Via Chirality–Engineered Graphene Quantum Dot Interface Passivation

The shift toward environmentally friendly solvent systems in the fabrication of halide perovskite solar cells is essential for the development of sustainable energy technologies. Traditional toxic solvents, such as dimethylformamide, pose significant environmental and health risks, underscoring the need for green alternatives. In this study, we present a non-toxic, biodegradable solvent system enhanced with cationic surfactants of varying alkyl chain lengths to improve the morphology and performance of perovskite films.
To thoroughly investigate the effects of surfactant-modified green solvents, we employed Scanning Near-field Optical Microscopy to analyze the nanoscale optoelectronic properties, crystallization behavior, and defect distribution in the perovskite films. This approach provided critical insights into how surfactants influence film uniformity, crystallinity, and overall photovoltaic performance.
Our optimized eco-friendly perovskite ink enabled a power conversion efficiency of > 23 %, with significantly enhanced stability, emphasizing the potential for industrial scalability and a step forward in the commercialization of perovskite solar cells.