A Photovoltaic Self-Powered Volatile Organic Compounds Sensor Based on Asymmetric Geometry 2D MoS2 Diodes
Date
2024-09
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Publisher
The Electrochemical Society
Abstract
Transition metal dichalcogenides have gained considerable interest for vapour sensing applications due to their large surface-to-volume ratio and high sensitivity. Herein, we demonstrate a new self-powered volatile organic compounds (VOC) sensor based on asymmetric geometry multi-layer molybdenum disulfide (MoS2) diode. The asymmetric contact geometry of the MoS2 diode induces an internal built-in electric field resulting in self-powering via a photovoltaic response. While illuminated by UV-light, the sensor exhibited a high responsivity of ∼60% with a relatively fast response time of ∼10 sec to 200 ppm of acetone, without an external bias voltage. The MoS2 VOC diode sensor is a promising candidate for self-powered, fast, portable, and highly sensitive VOC sensor applications.
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Keywords
volatile organic compounds (VOCs), asymmetric geometry, surface to volume ratio, photovoltaic sensor
Citation
Fawzy, Mirette, Mohammad Reza Mohammadzadeh, Amin Abnavi, Thushani De Silva, Ribwar Ahmadi, Hamidreza Ghanbari, Fahmid Kabir, Karen L. Kavanagh, Amirhossein Hasani, and Michael M. Adachi. "A Photovoltaic Self-Powered Volatile Organic Compounds Sensor Based on Asymmetric Geometry 2D MoS2 Diodes." ECS Sensors Plus 3, no. 4 (2024): 043601.
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