Roles of Organic Molecules in Inorganic CsPbX3 Perovskite Solar Cells

Over 25% efficiencies have been achieved by organic-inorganic hybrid perovskite solar cells (PSCs). However, their practical applications are limited by the instability of the hybrid perovskite materials. Replacing hybrid perovskites with inorganic CsPbX3 perovskites shows great promise to address the above issue and much progress has been made. To achieve high efficiency and stable inorganic CsPbX3 PSCs, organic molecular engineering has been playing a vital role. Herein, the progress of the organic molecular engineering in inorganic CsPbX3 PSCs is systematically reviewed. First, structure evolution induced by organic molecular engineering for inorganic CsPbX3 perovskites is demonstrated. Then, organic molecular engineering in CsPbX3 PSCs is categorized and reviewed (alloying in perovskite structures, as sacrificial agents, forming 2D structures, and modifying surfaces and interfaces). Finally, future research directions are suggested to further improve the performance of inorganic PSCs.

Automated summary

Organic-inorganic hybrid perovskite solar cells have achieved efficiencies over 25%, but their practical applications are limited by material instability. Replacing hybrid perovskites with inorganic CsPbX3 perovskites shows promise, with organic molecular engineering playing a vital role. The progress and potential future directions of organic molecular engineering in inorganic CsPbX3 PSCs are reviewed systematically to achieve high efficiency and stability.