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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Bibliographic Details
Published inPhysica status solidi. C Vol. 14; no. 10
Main Authors De Iacovo, Andrea, Venettacci, Carlo, Colace, Lorenzo, Scopa, Leonardo, Foglia, Sabrina
Format Journal Article
LanguageEnglish
Published Weinheim Wiley Subscription Services, Inc 01.10.2017
Subjects
colloidal quantum dots
Fire detection
flame detector
near‐infrared photodetector
PbS quantum dots
Quantum dots
Selectivity
Sensitivity
Signal to noise ratio
Surveillance systems
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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.
ISSN:1862-6351
1610-1642
DOI:10.1002/pssc.201700186