Advanced Electronic Materials
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2021
·Vol. 8
·期 4
·2100997
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IF 7.295
Junyu He,Peilong Xu,Ruifu Zhou,Hao Li,Hongliang Zu,Jun Zhang,Yuanbin Qin,Xuhai Liu,Fengyun Wang
Ultraviolet (UV) photodetectors play an important role in numerous commercial and scientific applications. The UV photodetectors based on binary-cation indium zinc oxide (InZnO) thin films exhibit great performance enhancement, compared with their single-cation counterparts. However, UV photodetectors based on 1D InZnO nanowires could potentially exhibit more superior optoelectrical performance, due to the large surface-to-volume ratio and favorable carrier transport characteristics of nanowires. This work has combined combustion synthesis with electrospinning technique to efficiently fabricate InZnO nanowire-based UV photodetectors. At the annealing temperature of 375 °C, the newly designed InZnO nanowire photodetectors exhibit excellent photoelectric performance under the irradiation of 310 nm UV light, including a photo-to-dark current ratio of 1.2 × 10 4 , a photo responsivity of 2.8 × 10 3 A W –1 , and a high detectivity of 2.4 × 10 16 Jones. This study not only demonstrates the opportunity to construct new-generation transparent electronics based on 1D metal oxide nanowires but also sheds new light on how to further decrease the annealing temperature of metal oxide nanowire devices for low-temperature fabrication processes.
研究领域:
材料科学
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纳米科技
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光电子学
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半导体器件
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功能材料
✓ 已验证
DOI
高影响因子
Advanced Electronic Materials
·
2021
·Vol. 7
·期 11
·2100706
·
IF 7.295
Hui Liu,Chaolei Zuo,Ziliang Li,Xinya Liu,Xiaosheng Fang
The rapid development of artificial intelligent and internet of things calls for high-performance multifunctional devices for synchronous detection of a wide variety of environmental signals, such as gas, light, and humidity. Herein, highly crystallized tin dioxide (SnO 2 ) microwires (MWs) with low density of point defects are synthesized by the chemical vapor deposition method and constructed into a multifunctional device for photo and humidity sensing. The device shows excellent photoelectric performances, for example, ultralow dark current of ≈10 −13 A, ultrahigh on–off ratio of >10 7 , UV/visible rejection ratio of R 300 nm / R 400 nm > 10 7 , specific detectivity ( D *) of 1.16 × 10 15 Jones, linear dynamic range (LDR) of 152 dB, high responsivity of 18 A W −1 , and fast photoresponse speed of t rise / t decay = 2.7 µs/2.5 ms at 5 V bias. Furthermore, the p-CuI/n-SnO 2 heterojunction shows outstanding self-powered properties, such as responsivity of 8.98 mA W −1 , specific detectivity of 1.98 × 10 12 Jones and LDR of 106 dB at 0 V bias. Additionally, the SnO 2 MWs also show high sensitivity to ambient humidity changes. Therefore, the SnO 2 MWs show high potential for multifunctional applications, such as UV photodetector and humidity sensor.
研究领域:
材料科学
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纳米科技
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传感器技术
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半导体物理
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环境监测
✓ 已验证
DOI
高影响因子
Small
·
2024
·Vol. 20
·期 27
·2308590
·
IF 13
Xiang Xu,Ying Wang,Yeqin Ji,Zhijian Chen,Chunhui Lu,Xinlong Xu,Dengxin Hua
Flexible broadband photodetectors are desired but challenging to be fabricated for next-generation wearable intelligent optoelectronic devices. Considering the narrow bandgap and strong light absorption, molybdenum telluride (MoTe 2 ) based photoelectrochemical photodetectors are successfully assembled by liquid phase exfoliation accompanied with the electrophoretic deposited method. This MoTe 2 -based photodetector shows a broadband detection in ultraviolet–near-infrared band, long-term stability within 18000 s, and fast response in millisecond-level (response time≈19 ms, recovery time≈26 ms). More importantly, even though the MoTe 2 photodetector is bent and twisted at a high degree for several hundred times, it still shows excellent flexibility with stable on-off switching characteristics. Additionally, this photodetector displays a good response for rotation angles in the range from 0° to 360°, and the extracted I ph maintain almost the same value approximately 0.97 µA cm −2 , suggesting an omnidirectional detection capability. This work demonstrates the proposed flexible photoanode shows a great potential in future broadband omnidirectional detection systems.
研究领域:
纳米生物医学
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光电子学
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材料科学
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生物传感器
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可穿戴设备
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分子诊断
✓ 已验证
DOI
高影响因子
Laser & Photonics Reviews
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2024
·Vol. 19
·期 1
·2401012
·
IF 9.8
Pengcheng Jian,Maohua Chen,Dongyan Li,Yongming Zhao,Weijie Liu,Yuang Luo,Xiantai Tian,Meng Peng,Xing Zhou,Jiangnan Dai,Feng Wu,Changqing Chen
The extraordinary mechanical compliance of 2D molybdenum disulfide (MoS 2 ) makes it an ideal candidate for strain modulation of various electrical and optical properties. However, developing facile methods for accurate and stable engineering of strain still remains a major challenge. Here, a novel and effective method is demonstrated for introducing periodic strain into monolayer MoS 2 by direct growth on nano-patterned sapphire substrates (NPSS). A mixed aqueous solution of Na 2 MoO 4 and NaOH is spin-coated on the NPSS and sulfurated in one step by chemical vapor deposition (CVD). Highly oriented monolayer MoS 2 single-crystal nanosheets with high quality and few sulfur vacancies are achieved conformally on the NPSS via a liquid-mediated growth mode. Notably, the periodically distributed blue shift of the PL emission peak demonstrated periodic compressive strain is introduced into the nano-patterned MoS 2 via the thermal expansion difference between MoS 2 and substrates. Furthermore, photodetectors fabricated using the nano-patterned monolayer MoS 2 exhibit a high photo-to-dark current ratio (PDCR) over 10 6 , an excellent detectivity of 5.4 × 10 13 Jones, and a fast photoresponse of 7.7 ms, owing to the strain-induced back-to-back built-in electric field, enhanced light absorption by light-scattering effect and fewer S vacancy defects. The scanning imaging demonstration based on the single-pixel nano-patterned MoS 2 photodetector further confirms its great potential in image sensors. This work hereby presents a pathway for direct conformal growth of nano-patterned monolayer MoS 2 with precisely periodic strain, which should inspire the applications for high-performance optoelectronic devices via the strategy of patterned substrate engineering by the periodic nanostructures.
研究领域:
材料科学
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纳米科技
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光电子学
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凝聚态物理
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表面科学
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半导体器件
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）