High Sensitivity Flame Sensor Based on PbS Colloidal Quantum Dots. Issue 10 (15th September 2017)

• Record Type: Journal Article
• Authors: De Iacovo, Andrea; Venettacci, Carlo; Colace, Lorenzo; Scopa, Leonardo; Foglia, Sabrina
• Is Part Of: Physica status solidi. Volume 14:Issue 10(2017)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-09-15
• Subjects: colloidal quantum dots -- flame detector -- near‐infrared photodetector -- PbS quantum dots; Solid state physics -- Congresses; Solid state physics -- Periodicals; Solid state physics; Conference proceedings; Periodicals; 530.41
• DOI: 10.1002/pssc.201700186
• Languages: English
• ISSNs: 1862-6351

Abstract

Abstract : 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). Abstract : 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.