Interfacial and structural modifications in perovskite solar cells
The rapid and continuous progress in perovskite solar cells (PSCs) has drawn lots of attention from the photovoltaic research community and urges them to apply perovskite in other electronic devices such as photo detectors, light-emitting diodes, and batteries. Thanks to the diversity of the device configuration, optimization of the film deposition and exploration of material system, the power conversion efficiency (PCE) of PSCs has boosted to a certified 25.2%, making this solar cell to date the fastest advancing technology. As demonstrated by worldwide researchers, controlling the morphology and defects of the perovskite film is essential for attaining high performance of PSCs. In this regard, interface engineering has proven a very efficient way to address these issues, obtaining better charge collection efficiency and reducing recombination losses. In this review, the interfacial modification between perovskite films and charge-transport layers (CTLs) as well as CTLs and electrodes of PSCs has been widely investigated. Grain boundary (GB) engineering and stress engineering are also included since these are closely related with the improvement of device performance and stability. Finally, an outlook on current challenges and future research direction are provided for highly efficient PSCs.
- This article is part of the themed collection: Recent Review Articles