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However, under some practical operating conditions, organic photodetectors are typically subjected to high dark current that limits the device detectivity. Here, we report an electric\u2010field\u2010engineering strategy that enables tunable spatial carrier extraction in donor\u2010acceptor bulk heterojunctions through doping\u2010induced space\u2010charge redistribution. By reshaping the internal electric\u2010field profile, the carrier\u2010extraction region can be selectively tuned across the active layer. Therefore, the engineered field profile suppresses extraction of injected carriers, contributing to low dark current and high detectivities under reverse bias. Simultaneously, spatial selective extraction of photocarriers enables tuning of the photoresponse bandwidth of thin\u2010film organic photodetectors without external optical filters. The spectral response can be systematically tuned across multiple material systems, dopants, and device architectures. These results establish electric\u2010field engineering as a general framework for spectrally selective, high\u2010detectivity organic photodetection under practically relevant operating conditions.<\/jats:p>","DOI":"10.1002\/adma.75009","type":"journal-article","created":{"date-parts":[[2026,9,15]],"date-time":"2026-09-15T10:20:01Z","timestamp":1789467601000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Spectral Selective and Low\u2010Noise Thin\u2010Film Organic Photodetectors Enabled by Electric\u2010Field Engineering"],"prefix":"10.1002","volume":"38","author":[{"given":"Jingwei","family":"Yi","sequence":"first","affiliation":[{"name":"Department of Materials Science and Engineering North Carolina State University  Raleigh North Carolina USA"},{"name":"Organic and Carbon Electronics Laboratories (ORaCEL) North Carolina State University  Raleigh North Carolina 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