An Embedding 2D/3D Heterostructure Enables High-Performance FA-Alloyed Flexible Perovskite Solar Cells with Efficiency over 20.

ABSTRACT: Flexible perovskite solar cells (f-PSCs) have attracted increasing attention because of their enormous potential for use in consumer electronic devices. The key to achieve high device performance is to deposit pinhole-free, uniform and defect-less perovskite films on the rough surface of polymeric substrates. Here, a solvent engineering to tailor the crystal morphology of FA-alloyed perovskite films prepared by one-step blade coating is first deployed. It is found that the use of binary solvents DMF:NMP, rather than the conventional DMF:DMSO, enables to deposit dense and uniform FA-alloyed perovskite films on both the rigid and flexible substrates. As a decisive step, an embedding 2D/3D perovskite heterostructure is in situ formed by incorporating a small amount of 4-guanidinobutanoic acid

SUBMITTER: Wang Z 

PROVIDER: S-EPMC8596135 | biostudies-literature | 2021 Nov

REPOSITORIES: biostudies-literature