AIP Advances (Feb 2023)

Infrared detection through CMOS detector enabled by reversible luminescence quenching of quantum dots

  • Jeffrey Gan Wang,
  • Ruihua Ma,
  • Xing Wu,
  • Kangmin Leng,
  • Qisheng Wang

DOI
https://doi.org/10.1063/5.0137649
Journal volume & issue
Vol. 13, no. 2
pp. 025139 – 025139-7

Abstract

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The detection of infrared radiation through a CMOS detector has recently intrigued the scientists and engineers all over the world. This could lower the cost, simplify the operation, and improve the pixel of the conventional infrared detection technology. To achieve this objective, the infrared light is converted into visible light via up-conversion nanoparticles or LED, which, however, suffers from complicated device fabrication. Herein, we report a type of simple infrared detection via a CMOS detector based on quantum dots (QDs). Inspired by the temperature effect of luminescence QDs, we design a setup that modulates the luminescence intensity of QDs via infrared radiation, which can be read out through a CMOS camera. Furthermore, the underlying mechanism of thermal quenching behavior is investigated through measurements of transient photoluminescence. Compared with traditional IR detectors, our infrared detection system possesses the advantages of facile fabrication and scalability, showing great potential for infrared detection.