Flame Detectors Based on Semiconductor Nanocrystals

D. N. Pevtsov; Певцов Д. Н.; D. V. Demkin; Дёмкин Д. В.; A. V. Katsaba; Кацаба А. В.; A. V. Gadomska; Гадомская А. В.

doi:10.31857/S0023119323040101

Flame Detectors Based on Semiconductor Nanocrystals

Authors: Pevtsov D.N.¹^,2, Demkin D.V.², Katsaba A.V.²^,3, Gadomska A.V.¹
Affiliations:
1. Federal Research Center for Problems of Chemical Physics and Medicinal Chemistry, Russian Academy of Sciences
2. Moscow Institute of Physics and Technology (National Research University)
3. Lebedev Physical Institute, Russian Academy of Sciences
Issue: Vol 57, No 4 (2023)
Pages: 290-297
Section: PHOTONICS
URL: https://ruspoj.com/0023-1193/article/view/661491
DOI: https://doi.org/10.31857/S0023119323040101
EDN: https://elibrary.ru/QNZEBJ
ID: 661491

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Abstract

The possibility of using semiconductor nanocrystals in photodetectors for optical detection of open flame has been explored. The spectral range boundaries of response of flame detectors have been concretized. In accordance with this, colloidal lead sulfide nanocrystals absorbing in the range of 1–1.5 μm have been synthesized. Photoresistors with different ligand compositions have been made from these particles. For the obtained samples, the current–voltage characteristics were measured and the photosensitivity and specific
detectivity parameters were calculated. A theoretical estimate of the flame detection range has been made for the samples. It has been shown that a photosignal can be reliably detected at a distance of more than 80 m.

Keywords

optical flame sensors, semiconductor nanocrystals, lead sulfide, photoresistors

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