ABSTRACT: Over recent years, the family of semiconductors known as perovskites, or semiconductor perovskites (SPs), has been a hot topic in thousands of publications dedicating substantial efforts to study its basic properties and to implement a wide range of optoelectronic devices. Unlike more traditional semiconductors, such as Si or III-V, SPs are easily synthesized at low processing temperatures, making them potentially very desirable because of their fabrication under cheap equipment and low environmental impact. Moreover, SPs can be deposited as thin films by solution processing techniques (spin coating, doctor blading, inkjet printing, …), giving rise to layers with excellent optoelectronic properties: absorption coefficients above 1 cm-1, room temperature emission efficiencies close to 100 %, high electronic mobilities… Furthermore, their impressive optoelectronic properties are complemented by an enormous compositional range, so that the bandgap energy can b! e tuned from near infrared (NIR, up to almost 1 µm) to ultraviolet (UV, 350-400 nm), and the synthesis in different morphologies (polycrystalline thin films, nano-sheets, nano/microcrystals…) and/or dimensionalities (2D and quasi-2D semiconductors and quantum dots). This presentation will introduce the state of the art of SPs in the semiconductor technology by reviewing their physical properties and their dependence on composition/morphology. It will also describe the synthesis and fabrication methodologies, and highlight the progress in implementing optoelectronic comprising, including solar cells, photodetectors and optical sources. Particular emphasis will be placed on photonic devices, considering the presenter’s group’s demonstrated expertise in this domain. The talk will end with an examination of the inherent limitations in stability and processing associated with these materials, together with prospects for their advancement.