Organic bolometers for far infrared detection

Bram Bijnens; Sam Gielen; Wouter Maes; Koen Vandewal

doi:10.1117/12.3016689

19 June 2024 Organic bolometers for far infrared detection

Bram Bijnens, Sam Gielen, Wouter Maes, Koen Vandewal

Proceedings Volume PC13013, Organic Electronics and Photonics: Fundamentals and Devices IV; PC130130Z (2024) https://doi.org/10.1117/12.3016689
Event: SPIE Photonics Europe, 2024, Strasbourg, France

Abstract

The current state-of-the-art infrared (IR) systems use inorganic semiconductors for so-called photonic detection in the near (few μm) and mid-IR (10’s of μm) range and switch to thermal detection systems such as bolometers for the large wavelength regimes (up to mm range). In order to lower the cost of IR detectors, much effort is put into designing low-gap polymers or molecules for organic photo-detectors, but their detection range is currently still limited to 1500-1600 nm wavelengths, with modest detectivities in comparison to existing inorganic technologies in the short wave infrared (SWIR) range. In this work, we look at the possibility of using organic semiconductors in a bolometric device for infrared detection over an extensive wavelength range, spanning from the SWIR to the mid-IR. We find advantages of using organic materials compared to inorganic materials for the fabrication of bolometers and use theoretical modeling to guide us on which parameters we can use to optimize our devices. We find two key parameters determining the device performance: the polymers’ thermal conductivity and the overall device thickness.

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Citation Download Citation

Bram Bijnens, Sam Gielen, Wouter Maes, and Koen Vandewal "Organic bolometers for far infrared detection", Proc. SPIE PC13013, Organic Electronics and Photonics: Fundamentals and Devices IV, PC130130Z (19 June 2024); https://doi.org/10.1117/12.3016689

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KEYWORDS

Bolometers

Infrared detectors

Infrared radiation

Far infrared

Polymers

Thermography

Short wave infrared radiation

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