Beschreibung:
Organic-inorganic hybrid perovskite solar cells (PSCs) are the prime candidates for solar energy conversion technologies owing to their superior photoelectric performance and low-temperature processibility. The electron transport layer (ETL) is one of the most important compositions for preparing PSCs. Herein, we innovatively introduce a strategy of poly(methyl vinyl ether- alt -maleic anhydride) (PVEM) complexes with SnO 2 to prepare an organic-inorganic hybrid PVEM-SnO 2 ETL. The preparation of a dense PVEM-SnO 2 ETL film with few defects and the perfect wetting property considerably increases the electron extraction and transportability, and dramatically reduces the trap-state density of perovskite film. Correspondingly, the PCE of rigid PSCs based on PVEM- SnO 2 increases to 19.86% with negligible hysteresis and better long-term stability. Meanwhile, by adding PVEM into SnO 2 , the flexible device demonstrates a high PCE of 16.86% and exhibits excellent bending durability