High-performance flexible photodetectors based on CdTe/MoS2 heterojunction

Flexible photodetectors have attracted escalating attention due to their pivotal role in next-generation wearable optoelectronic devices. This work presents high-performance photodetector devices based on CdTe/MoS2 heterojunctions, showcasing outstanding photodetecting and distinctive mechanical pro...

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Bibliographic Details
Published in:Nanoscale 2024-07, Vol.16 (29), p.13932-13937
Main Authors: Yang, Shuo, Liu, Yunjie, Wu, Yupeng, Guo, Fuhai, Zhang, Mingcong, Zhu, Xinru, Xu, Ruqing, Lanzhong Hao
Format: Article
Language:English
Subjects:
Cadmium tellurides
Heterojunctions
Mechanical properties
Molybdenum disulfide
Optoelectronic devices
Photometers
Photovoltaic effect
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Summary:Flexible photodetectors have attracted escalating attention due to their pivotal role in next-generation wearable optoelectronic devices. This work presents high-performance photodetector devices based on CdTe/MoS2 heterojunctions, showcasing outstanding photodetecting and distinctive mechanical properties. The MoS2 film was exfoliated from bulk layered MoS2 and covered by a sputtered ultrathin CdTe film (∼8.4 nm) to form a heterojunction. Benefitting from the photovoltaic effect induced by the built-in electrical field near the high-quality interface, the fabricated CdTe/MoS2 heterojunction photodetector can operate as a self-powered photodetector without any external bias voltage, especially showing a high photodetectivity of 5.84 × 1011 Jones, remarkable photoresponsivity of 270.3 mA W−1, fast photoresponse with a rise/fall time of ∼44.8/134.2 μs and excellent bending durability. These results demonstrate that the CdTe/MoS2 heterojunctions could have significant potential for future applications in optoelectronic devices.
ISSN:2040-3364
2040-3372
2040-3372
DOI:10.1039/d4nr01718h