Journal
IEEE SENSORS JOURNAL
Volume 17, Issue 14, Pages 4454-4459Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JSEN.2017.2710301
Keywords
Optical fire detector; PbS colloidal quantum dot; near infrared photodetectors
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We report on a novel optical fire detector based on a PbS colloidal quantum dot photodetector. The sensor is realized with a simple, cost effective, drop casting technique. The photodetector is characterized in terms of its electrical characteristics, responsivity, and specific detectivity to monochromatic light. We demonstrate effective indoor fire detection at a distance exceeding 20 m with a 120. field of view. We also show a twofold improvement of the detector signal to noise ratio exploiting a short focal lens.
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