Absorption Properties of Hybrid 2D Perovskite Structures for Photodetector Applications

The field of optoelectronics has seen great strides taken in recent years with the development of halide perovskites. To date, most work on halide perovskites has focused on solar cells and photodetection technologies have attracted less attention. In particular, hybrid organic-inorganic 2D perovskites have the potential for photodetectors if properly coupled with an organic absorber. This configuration can provide improved structural stability alongside highly tunable band edges, which is ideal for the collection and transfer of charge carriers necessary in light detectors. In this work, I will explore how altering the chemical composition of a 2D perovskite inorganic layer affects its band edges. I will study the changes in the excited state populations and lifetimes using spectroscopic methods such as transient absorption. Pathways for effective carrier transport from the organic to the inorganic will be studied. Finally, I will discuss device optimization for photodetector applications with the 2D perovskite. This work will enable new understanding of the role chemistry plays on band edges in 2D perovskites and their effect on photodetection mechanisms.