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CuFeSe2Quantum-Dot Based Infrared Photodetectors with Functionality in the Ambient

Kumar, T and Sugathan, A and Narasimhan, KL and Pandey, A and Avasthi, S (2021) CuFeSe2Quantum-Dot Based Infrared Photodetectors with Functionality in the Ambient. In: 20th IEEE Sensors, SENSORS 2021, 31 Oct-4 Nov 2021, Virtual, Online.

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Official URL: https://doi.org/10.1109/SENSORS47087.2021.9639657


Applications such as infrared cameras and detectors have driven efforts to discover novel infrared materials. Quantum dots have been demonstrated as sensitive and tunable infrared absorbers. Most successful quantum dots are prepared from heavier II-VI materials based on mercury and therefore pose toxicity hazards. Here we investigate CuFeSe2 quantum dots as a potential solution processed, minimally hazardous photodetector material for the fabrication of devices with functionality in the ambient. Following characterization of the nanocrystals through Transmission Electron Microscopy (TEM) and their absorption spectrum with infrared spectroscopy, we demonstrate infrared and visible light detection with two device architectures. A Metal-Semiconductor-Metal (MSM) photoconductor shows optoelectronic response with infrared light, and a p-n heterojunction shows the characteristic I-V curve with a broadband visible-infrared light source. We thus demonstrate the application of CuFeSe2 quantum dots as an infrared active material, and its heterojunction with silicon as a promising photodetector device. © 2021 IEEE.

Item Type: Conference Paper
Publication: Proceedings of IEEE Sensors
Publisher: Institute of Electrical and Electronics Engineers Inc.
Additional Information: The copyright for this article belongs to Institute of Electrical and Electronics Engineers Inc.
Keywords: Absorption spectroscopy; Copper compounds; Hazards; Heterojunctions; High resolution transmission electron microscopy; Infrared spectroscopy; Iron compounds; Light; Light absorption; Light sources; Nanocrystals; Photodetectors; Photons; Selenium compounds, Ambients; Infra-red cameras; Infrared cameras; Infrared light; Infrared material; Infrared photodetector; Material-based; Solution-processed; Through transmission; Tunables, Semiconductor quantum dots
Department/Centre: Division of Chemical Sciences > Solid State & Structural Chemistry Unit
Division of Interdisciplinary Sciences > Centre for Nano Science and Engineering
Date Deposited: 13 Feb 2022 08:47
Last Modified: 13 Feb 2022 08:47
URI: http://eprints.iisc.ac.in/id/eprint/71390

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