“…Metal halide perovskites have recently emerged as one of the most extensively investigated semiconductor materials, surpassing their counterparts, such as organic semiconductors, amorphous silicon, metal oxides, and carbon nanotubes. − Despite their growing popularity, the fabrication of perovskite-based electronic, optoelectronic, and bioelectronic devices, including chemical sensors, light-emitting diodes, field-effect transistors (FETs), photovoltaics, phototransistors, memory, and neuromorphic devices, is challenged by their inherent ionic defects. Addressing these challenges requires meticulous control over perovskite film morphology, optimization of device structure, and development of effective, robust interfaces. − In perovskite solar cells, interface engineering has been pivotal in enhancing device performance and achieving operational and environmental stability. − Similarly, interfacial and contact engineering are crucial in advancing the performance of organic FETs and emerging perovskite FETs. , In conventional FETs, three critical interfacesthe contact electrode/semiconductor interface, the semiconductor/dielectric interface, and the dielectric/gate electrode interface, significantly influence charge injection and transport. Although charge transport predominantly occurs at the semiconductor/dielectric interface, the energy level alignment of metal contacts with the perovskite semiconductor layer is essential for efficient charge transport and stable device operation.…”