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Keywords = tin monoselenide

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11 pages, 1865 KiB  
Article
High-Performance Self-Driven SnSe/Si Heterojunction Photovoltaic Photodetector
by Fuwen Luo, Hongxi Zhou, Yuxuan Liu, Yao Xu, Zhiheng Zhang, Chao Chen and Jun Wang
Chemosensors 2023, 11(7), 406; https://doi.org/10.3390/chemosensors11070406 - 19 Jul 2023
Cited by 5 | Viewed by 2340
Abstract
Tin monoselenide (SnSe), which belongs to group IV–VI monochalcogenides, has obtained significant attention in the field of photodetection owing to its ultrahigh carrier mobilities. However, the great challenges of preparing high-quality films and high-performance devices still need to be conquered. Herein, high-density continuous [...] Read more.
Tin monoselenide (SnSe), which belongs to group IV–VI monochalcogenides, has obtained significant attention in the field of photodetection owing to its ultrahigh carrier mobilities. However, the great challenges of preparing high-quality films and high-performance devices still need to be conquered. Herein, high-density continuous SnSe films were deposited on a Si substrate using magnetron sputtering technology, and a self-driven photovoltaic-type broadband photodetector from the visible light range (VIS) to the near-infrared (NIR) range based on SnSe/Si heterojunction was constructed. Owing to its high carrier mobility, narrow band gap structure, and strong internal electric field, the SnSe/Si heterojunction device exhibits an ultrafast response and high responsivity (R), which achieves a wide spectral response of 405–980 nm. Under zero bias voltage, the greatest R and detectivity (D*) of the heterojunction were 704.6 mA/W and 3.36 × 1011 Jones at 405 nm. Furthermore, the device had a fast response time (rise time) of 20.4 μs at 980 nm of illumination. This work provides a new strategy for the fabrication of high-performance, low-cost, and self-driven photodetectors. Full article
(This article belongs to the Section Electrochemical Devices and Sensors)
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9 pages, 6288 KiB  
Article
SnSe-Coated Microfiber Resonator for All-Optical Modulation
by Lei Chen, Jingyuan Ming, Zhishen Zhang, Jumei Shang, Lingyun Yu, Heyuan Guan, Weina Zhang, Zefeng Xu, Wentao Qiu, Zhe Chen and Huihui Lu
Nanomaterials 2022, 12(4), 694; https://doi.org/10.3390/nano12040694 - 19 Feb 2022
Cited by 1 | Viewed by 2495
Abstract
In this study, a tin monoselenide (SnSe)-based all-optical modulator is firstly demonstrated with high tuning efficiency, broad bandwidth, and fast response time. The SnSe nanoplates are deposited in the microfiber knot resonator (MKR) on MgF2 substrate and change its transmission spectra by [...] Read more.
In this study, a tin monoselenide (SnSe)-based all-optical modulator is firstly demonstrated with high tuning efficiency, broad bandwidth, and fast response time. The SnSe nanoplates are deposited in the microfiber knot resonator (MKR) on MgF2 substrate and change its transmission spectra by the external laser irradiation. The SnSe nanoplates and the microfiber are fabricated using the liquid-phase exfoliation method and the heat-flame taper-drawing method, respectively. Due to the strong absorption and enhanced light–matter interaction of the SnSe nanoplates, the largest transmitted power tunability is approximately 0.29 dB/mW with the response time of less than 2 ms. The broad tuning bandwidth is confirmed by four external pump lights ranging from ultraviolet to near-infrared. The proposed SnSe-coated microfiber resonator holds promising potential for wide application in the fields of all-optical tuning and fiber sensors. Full article
(This article belongs to the Special Issue Materials Science and Nanoengineering (ICMSN-2022))
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