Large Area Flexible Thin Layer Terahertz Detector

Song, Qi; Zhou, Yu; Wang, Yifei; Gao, Feilong; Wang, Jiatong; Zhang, Min; Wang, Yiran; Zhang, Bingyuan; Yan, Peiguang; Dong, Bo

doi:10.1002/aelm.202300149

Cited by 9 publications

(3 citation statements)

References 26 publications

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“…Nevertheless, our device maintains a favorable position among currently reported 2D flexible detectors in terms of size and response time (Figure 4g ; Table S1 , Supporting Information). [ 6 , 17 − 20 , 27 , 48 − 58 ] Notably, the detectable wavelength range of this device, spanning the UV to MM wave spectrum, is the broadest among all 2D flexible detectors reported to date (Figure 4h ; Table S1 , Supporting Information). [ 6 , 16 , 18 − 20 , 26 , 27 , 48 , 50 − 55 , 58 − 62 ] This strongly underscores its potential applications in the development of broadband and miniaturized wearable photodetectors with fast response.…”

Section: Ultra‐broadband and Fast Photoresponse Of The Flexible Photo...mentioning

confidence: 99%

“…[ 6,17 − 20,27,48 − 58 ] Notably, the detectable wavelength range of this device, spanning the UV to MM wave spectrum, is the broadest among all 2D flexible detectors reported to date (Figure 4h; Table S1, Supporting Information). [ 6,16,18 − 20,26,27,48,50 − 55,58 − 62 ] This strongly underscores its potential applications in the development of broadband and miniaturized wearable photodetectors with fast response.…”

Section: Ultra‐broadband and Fast Photoresponse Of The Flexible Photo...mentioning

confidence: 99%

“…Nevertheless, most reported 2D semimetal‐based photodetectors are confined to rigid substrates. Even on flexible substrates, [ 6 , 26 , 27 ] inefficient hot carrier generation necessitates additional antennas or large channel lengths for long‐wavelength photodetection. This results in a large device footprint, slow response speed, and intricate fabrication, constraining their use in miniaturized and flexible devices for detection and imaging.…”

Section: Introductionmentioning

confidence: 99%

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A Flexible and Wearable Photodetector Enabling Ultra‐Broadband Imaging from Ultraviolet to Millimeter‐Wave Regimes

Liu,

Wang,

et al. 2024

Advanced Science

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Flexible and miniaturized photodetectors, offering a fast response across the ultraviolet (UV) to millimeter (MM) wave spectrum, are crucial for applications like healthcare monitoring and wearable optoelectronics. Despite their potential, developing such photodetectors faces challenges due to the lack of suitable materials and operational mechanisms. Here, the study proposes a flexible photodetector composed of a monolayer graphene connected by two distinct metal electrodes. Through the photothermoelectric effect, these asymmetric electrodes induce electron flow within the graphene channel upon electromagnetic wave illumination, resulting in a compact device with ultra‐broadband and rapid photoresponse. The devices, with footprints ranging from 3 × 20 µm2 to 50 × 20 µm2, operate across a spectrum from 325 nm (UV) to 1.19 mm (MM) wave. They demonstrate a responsivity (RV) of up to 396.4 ± 5.1 mV W−1, a noise‐equivalent power (NEP) of 8.6 ± 0.1 nW Hz−0.5, and a response time as small as 0.8 ± 0.1 ms. This device facilitates direct imaging of shielded objects and material differentiation under simulated human body‐wearing conditions. The straightforward device architecture, aligned with its ultra‐broadband operational frequency range, is anticipated to hold significant implications for the development of miniaturized, wearable, and portable photodetectors.

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Section: Ultra‐broadband and Fast Photoresponse Of The Flexible Photo...mentioning

confidence: 99%

Section: Ultra‐broadband and Fast Photoresponse Of The Flexible Photo...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Flexible and Wearable Photodetector Enabling Ultra‐Broadband Imaging from Ultraviolet to Millimeter‐Wave Regimes

Liu,

Wang,

et al. 2024

Advanced Science

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Recent Progress of 2D Materials‐Based Photodetectors from UV to THz Waves: Principles, Materials, and Applications

Abdullah,

Younis,

Sohail

et al. 2024

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Photodetectors are one of the most critical components for future optoelectronic systems and it undergoes significant advancements to meet the growing demands of diverse applications spanning the spectrum from ultraviolet (UV) to terahertz (THz). 2D materials are very attractive for photodetector applications because of their distinct optical and electrical properties. The atomic‐thin structure, high carrier mobility, low van der Waals (vdWs) interaction between layers, relatively narrower bandgap engineered through engineering, and significant absorption coefficient significantly benefit the chip‐scale production and integration of 2D materials‐based photodetectors. The extremely sensitive detection at ambient temperature with ultra‐fast capabilities is made possible with the adaptability of 2D materials. Here, the recent progress of photodetectors based on 2D materials, covering the spectrum from UV to THz is reported. In this report, the interaction of light with 2D materials is first deliberated on in terms of optical physics. Then, various mechanisms on which detectors work, important performance parameters, important and fruitful fabrication methods, fundamental optical properties of 2D materials, various types of 2D materials‐based detectors, different strategies to improve performance, and important applications of photodetectors are discussed.

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A Review on MXene/Nanocellulose Composites: Toward Wearable Multifunctional Electromagnetic Interference Shielding Application

Li,

Wang,

Huang

2024

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With the rapid development of mobile communication technology and wearable electronic devices, the electromagnetic radiation generated by high‐frequency information exchange inevitably threatens human health, so high‐performance wearable electromagnetic interference (EMI) shielding materials are urgently needed. The 2D nanomaterial MXene exhibits superior EMI shielding performance owing to its high conductivity, however, its mechanical properties are limited due to the high porosity between MXene nanosheets. In recent years, it has been reported that by introducing natural nanocellulose as an organic framework, the EMI shielding and mechanical properties of MXene/nanocellulose composites can be synergically improved, which are expected to be widely used in wearable multifunctional shielding devices. In this review, the electromagnetic wave (EMW) attenuation mechanism of EMI shielding materials is briefly introduced, and the latest progress of MXene/nanocellulose composites in wearable multifunctional EMI shielding applications is comprehensively reviewed, wherein the advantages and disadvantages of different preparation methods and various types of composites are summarized. Finally, the challenges and perspectives are discussed, regarding the performance improvement, the performance control mechanism, and the large‐scale production of MXene/nanocellulose composites. This review can provide guidance on the design of flexible MXene/nanocellulose composites for multifunctional electromagnetic protection applications in the future intelligent wearable field.

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Large Area Flexible Thin Layer Terahertz Detector

Cited by 9 publications

References 26 publications

A Flexible and Wearable Photodetector Enabling Ultra‐Broadband Imaging from Ultraviolet to Millimeter‐Wave Regimes

A Flexible and Wearable Photodetector Enabling Ultra‐Broadband Imaging from Ultraviolet to Millimeter‐Wave Regimes

Recent Progress of 2D Materials‐Based Photodetectors from UV to THz Waves: Principles, Materials, and Applications

A Review on MXene/Nanocellulose Composites: Toward Wearable Multifunctional Electromagnetic Interference Shielding Application

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