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However, the Sn\u2010based devices suffer from notorious instability and high defect densities due to the oxidation propensity of Sn<jats:sup>2+<\/jats:sup>. Herein, a multifunctional additive 4\u2010amino\u20102,3,5,6\u2010tetrafluorobenzoic acid (ATFBA) is presented, which can passivate surface defects and inhibit the oxidation of Sn<jats:sup>2+<\/jats:sup> through hydrogen bonds and chelation coordination from the terminal amino and carboxyl groups. The perfluorinated benzene ring structure of ATFBA affords the passivator assembled at the grain boundaries to enhance the water resistance. With the synergistical passivation of these functional groups, the Sn\u2013Pb perovskite photodetector exhibits a remarkable responsivity of 0.52\u00a0A\u00a0W<jats:sup>\u20101<\/jats:sup> and an excellent specific detectivity of 5.34\u00a0\u00d7\u00a010<jats:sup>12<\/jats:sup> Jones at 850\u00a0nm, along with remaining 97% of its initial responsivity over 450 days. Benefitting from high sensitivity, the photodetector is integrated into a pulse oximetry sensor visualization system, yielding accurate blood oxygen saturation and heart rate with less than 2% error. This work paves the avenue toward constructing high\u2010performance and stable Sn\u2013Pb perovskite photodetectors for practical applications.<\/jats:p>","DOI":"10.1002\/adma.202210016","type":"journal-article","created":{"date-parts":[[2022,12,13]],"date-time":"2022-12-13T14:14:32Z","timestamp":1670940872000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":111,"title":["Highly Sensitive Tin\u2010Lead Perovskite Photodetectors with Over 450 Days Stability Enabled by Synergistic Engineering for Pulse Oximetry System"],"prefix":"10.1002","volume":"35","author":[{"given":"Lijuan","family":"He","sequence":"first","affiliation":[{"name":"State Key Laboratory of Integrated Optoelectronics College of Electronic Science and Engineering, International Center of Future Science Jilin University  Changchun 130012 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