Perovskite solar cell stabilization via tuned ion and charge transport kinetics at new metal oxide/perovskite interfaces

Perovskite solar cells (PSCs) are emerging as potential candidate for a low-cost source of energy, owing to their excellent light harvesting properties, accompanied with low-cost solution-based fabrication technique. However, the commercialisation and implementation of this technology on the energy market is still challenging due to its limited long-term stability. Recently, metal oxides have proved to be excellent electron transport layers (ETLs) for efficient PSCs due to their superior charge extraction and transport properties. The challenge on stability, however, remains.

In this proposal, we will be answering the following research question: Can novel metal oxide semiconductors be employed as electron transport layer to enhance the stability of lowenvironmental impact perovskite solar cells (PSCs). We will be engineering new metal oxides semiconductor layer and study ion and charge transport kinetics at ETL/perovskite interface, which is responsible for the degradation of performance of PSCs, using small perturbation frequency domain techniques. We expect to improve the long-term stability of PSCs and thus close the remaining gap for commercialization.