This review article provides a comprehensive overview of wide bandgap semiconductors for ultraviolet (UV) photodetectors (PDs), highlighting their applications and future prospects. UV PDs, which convert UV photons into detectable signals, are crucial for various fields such as environmental monitoring, healthcare, and aerospace. Wide bandgap semiconductors, with their high-efficiency UV light absorption and stable optoelectronic properties, are ideal materials for UV PDs. The review covers recent advancements in both traditional and emerging wide bandgap-based UV PDs, including their roles in UV imaging, communication, and alarming. It also examines methods to enhance UV PD performance, discussing the advantages, challenges, and future research directions. The article aims to spark innovation and guide the future development and application of UV PDs. Key topics include the classification of UV PDs, materials for UV PDs, approaches to improve UV PD performance, and various applications such as UV imaging, communication, and alarming. The review concludes with a discussion on the challenges and potential directions for further advancements in wide bandgap UV PDs.This review article provides a comprehensive overview of wide bandgap semiconductors for ultraviolet (UV) photodetectors (PDs), highlighting their applications and future prospects. UV PDs, which convert UV photons into detectable signals, are crucial for various fields such as environmental monitoring, healthcare, and aerospace. Wide bandgap semiconductors, with their high-efficiency UV light absorption and stable optoelectronic properties, are ideal materials for UV PDs. The review covers recent advancements in both traditional and emerging wide bandgap-based UV PDs, including their roles in UV imaging, communication, and alarming. It also examines methods to enhance UV PD performance, discussing the advantages, challenges, and future research directions. The article aims to spark innovation and guide the future development and application of UV PDs. Key topics include the classification of UV PDs, materials for UV PDs, approaches to improve UV PD performance, and various applications such as UV imaging, communication, and alarming. The review concludes with a discussion on the challenges and potential directions for further advancements in wide bandgap UV PDs.