Enhanced Perovskite Photovoltaics with Non-conjugated Polymers: Recent Developments and Future Prospects

The rapid development of organic–inorganic hybrid perovskite has positioned it as an auspicious material for solar cells, given its high efficiency, flexibility, and cost-effectiveness. Since its introduction in 2009, perovskite solar cells (PSCs) have witnessed a remarkable increase in power conversion efficiency (PCE) from 3.8% to 26.1%. This review delves into various nonconjugated polymer (NCP) strategies that have played a crucial role in the success of perovskite devices, encompassing modifiers for the electron transport layer (ETL), polymer templates facilitating perovskite growth, and interface layers in the devices. This review aims to comprehensively outline the application strategies of NCP materials in PSCs, with potential advantages including enhanced charge extraction and transmission, improved light capture, enhanced device stability, and reduced hysteresis.