Abstract
High-sensitivity near-infrared organic photodetectors (NIR OPDs) have bright application prospects in the fields of optical communication, surveillance, chemical/biological detection and so on. In this review, we summarize recent works on NIR organic photodiodes and detail four main strategies: binary bulk heterojunctions (BHJs) with fullerene derivatives, binary BHJs with non-fullerene acceptors, ternary BHJs and a special kind of OPDs—visible blind NIR selective OPDs. Finally, based on the current development and challenges, we put forward the perspectives in this field.
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