Abstract
Photodetectors that convert optical information into electrical signals play an increasingly significant role in medical, military, and civil fields. Metal oxide materials possessing unique properties, high thermal stability, and facile processability have shown great potential in the applications of photodetectors. In this chapter, the fundamental principles including typical materials, device structures, and basic mechanisms of metal oxide-based photodetectors will be discussed in detail. We will emphasize the features and characteristics of metal oxide materials, and typical examples of nanomaterials and hybrid systems will be included to show the strategies for enhancing detecting performances in developing advanced photodetectors covering the spectrum from infrared (IR) to ultraviolet (UV). Finally, applications of metal oxide-based photodetectors in next-generation medical devices will be demonstrated and discussed.
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