Defect reduction by anthraquinone-modified graphdiyne quantum dots for efficient perovskite solar cells

Abstract

Abstract Fabricating perovskite film with higher crystallinity, smoother surface and less defects is a crucial step to obtain outstanding performance of perovskite solar cells (PSCs). Herein, we introduce anthraquinone modified graphdiyne quantum dots (GDY-AQ QDs) as an additive into the perovskite film. It is suggested that GDY-AQ QDs largely improved perovskite crystallization and reduced defects, resulting in high-quality GDY-AQ QDs perovskite film with excellent humidity and thermal stabilities. The as-fabricated PSCs achieve power conversion efficiency over 21% due to improved film quality and reduced defects. The strategy of molecularly designed GDY-AQ QDs doping presents great potential for the improvement of the performance of PSCs.