Understanding and harnessing the potential of layered perovskite-based absorbers for solar cells

Hybrid perovskite-based absorbers are promising materials for the fabrication of next-generation thin film photovoltaics, owing to their cost effectiveness and low amount of materials usage. Three-dimensional (3D) perovskite analogues have shown outstanding potential in terms of power conversion efficiency; however, the concern about its long-term stability impede its industrial endeavour. One such approach is the development and employment of lower dimensional, i.e. layered perovskite, structures that aim to achieve an improved stability along with competitive photovoltaic performance. Layered perovskite absorbers also provide a credible pathway of tuning the optoelectronic properties by judicious spacer groups. We highlight the use of layered perovskite-based absorbers and how its microstructure, optoelectronics, charge carrier dynamics influence the photovoltaic properties.