High Sensitivity Flame Sensor Based on PbS Colloidal Quantum Dots
Flame sensing and early fire detection are primary features in modern security and surveillance systems. Optical detection systems are widely developed and offer the highest sensitivity and selectivity but they are still expensive and show a high power budget. Here we propose a low‐cost, low‐power f...
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Published in | Physica status solidi. C Vol. 14; no. 10 |
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Main Authors | , , , , |
Format | Journal Article |
Language | English |
Published |
Weinheim
Wiley Subscription Services, Inc
01.10.2017
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Subjects | |
Online Access | Get full text |
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Summary: | Flame sensing and early fire detection are primary features in modern security and surveillance systems. Optical detection systems are widely developed and offer the highest sensitivity and selectivity but they are still expensive and show a high power budget. Here we propose a low‐cost, low‐power flame detector based on PbS colloidal quantum dots. We show detector operation with a 21 nW total power dissipation and the ability to detect the flame of a candle at 20 m with a 5 dB signal to noise ratio (SNR).
Photocurrent of the detector illuminated with a candle flame at a distance ranging from 2 to 20 m and spectral responsivity of the detector compared with the absorbance of the CQD solution. |
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ISSN: | 1862-6351 1610-1642 |
DOI: | 10.1002/pssc.201700186 |