Mohammadzadeh, Mohammad Reza

Hasani, Amirhossein

Hussain, Tanveer

Ghanbari, Hamidreza

Fawzy, Mirette

Abnavi, Amin

Ahmadi, Ribwar

Kabir, Fahmid

De Silva, Thushani

Rajapakse, R K N D

Adachi, Michael M

2024-12-05

<p>Volatile organic compound (VOC) sensors have a broad range of applications including healthcare monitoring, product quality control, and air quality management. However, many such applications are demanding, requiring sensors with high sensitivity and selectivity. 2D materials are extensively used in many VOC sensing devices due to their large surface-to-volume ratio and fascinating electronic properties. These properties, along with their exceptional flexibility, low power consumption, room-temperature operation, chemical functionalization potential, and defect engineering capabilities, make 2D materials ideal for highperformance VOC sensing. Here, a 2D MoS₂/Te heterojunction is reported that significantly improves the VOC detection compared to MoS₂ and Te sensors on their own. Density functional theory (DFT) analysis shows that the MoS₂/Te heterojunction significantly enhances the adsorption energy and therefore sensing sensitivity of the sensor. The sensor response, which denotes the percentage change in the sensor’s conductance upon VOC exposure, is further enhanced under photo-illumination and zero-bias conditions to values up to ≈7000% when exposed to butanone. The MoS₂/Te heterojunction is therefore a promising device architecture for portable and wearable sensing applications.</p>

Small, 20(49), p. 1-12

1613-6829

1613-6810

https://hdl.handle.net/1959.11/69814

en

Wiley-VCH Verlag GmbH & Co KGaA

Attribution-NonCommercial-NoDerivatives 4.0 International

Enhanced Sensitivity in Photovoltaic 2D MoS2/Te Heterojunction VOC Sensors

Journal Article

Publication