Dr. Siraj Sidhik, Wenbin Li have developed a new “phase-selective” memory seeds method to fabricate 2D perovskite thin films with homogenous layer thickness (phase purity). The phase-selective method involves the dissolution of single-crystalline powders with a homogeneous perovskite layer thickness in desired solvents to fabricate thin films. The study is published in Advanced Materials.
Photovoltaic devices with a p–i–n architecture are fabricated with such films, which yield an efficiency of 17.1% enabled by an open-circuit voltage of 1.20 V, while preserving 97.5% of their peak performance after 800 h under illumination without any external thermal management.
Link to the paper: https://doi.org/10.1002/adma.202007176