This research and reference text provides up-to-date coverage of the latest research on hot carriers in semiconductors, with a focus on the background, theoretical approaches, measurements and physical understanding required to engage with the field. It equips researchers transitioning from optics to hot carrier solar cells to fully understand the role of hot carriers in semiconductors. Pitched at an introductory level, this is an essential reference text for researchers, a core text for graduate courses in hot carrier phenomena, and valuable supplementary reading for first year graduate courses in quantum mechanics, condensed matter physics, solid-state electronics and photovoltaics. Key Features: Provides up-to-date coverage of hot carriers in semiconductors Focuses on the background, theoretical approaches, measurements and understanding of the physics Includes examples of experiments and applications of theoretical approaches Fills a gap for a comprehensive and up-to-date book with modern interpretations of observed phenomena Provides a comprehensive introduction for researchers, and acts as a core text for graduate courses in hot carrier phenomena