Article
Chemistry, Multidisciplinary
Jiantian Zhang, Wei Xu, Liming Wang, Zhaoqiang Zheng, Fucai Liu, Peng Yu, Guowei Yang
Summary: Band engineering can effectively tune the properties of materials, leading to improved performance. In this study, the first two-dimensional quaternary quantum dots (CIPS) were successfully fabricated using the lithium intercalation method. By forming lithium-induced phosphorus and sulfur vacancies, the band structure of CIPS was tuned, resulting in stronger optical absorbance and higher conductivity. The CIPS quantum dots exhibited outstanding optoelectronic performances in broadband photodetection, retaining excellent photoresponse on flexible substrates and in imaging applications.
CRYSTAL GROWTH & DESIGN
(2023)
Article
Engineering, Environmental
Hang Li, Yan-Ling Yang, Xing Li, Xiao-Yan Fan, Nan Wang
Summary: VUV/PS is a promising method for antibiotics removal, showing better degradation efficiency compared to UV/PS, especially at low initial SMT concentrations and a solution pH of 5. It also exhibits high removal efficiency for high concentrations of SMT in various water matrices, with sulfate and hydroxyl radicals playing key roles in the degradation process.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2021)
Article
Materials Science, Multidisciplinary
Xuesong Li, Yulu Zhou, Fengchang Huang, Xiaoma Tao, Yifang Ouyang, Xiaoming Mo, Jialong Zhao
Summary: In this work, a self-powered ultraviolet photodetector (UV PD) with a heterostructured design using lead-free copper(i) halide Cs3Cu2I5 microcrystals (MCs) was demonstrated. The X chromosome-shaped Cs3Cu2I5 MCs showed blue emission and exhibited high stability. By introducing a thin polymethyl methacrylate (PMMA) film as interface modification, the heterostructured UV PD achieved remarkable responsivity, detectivity, on/off ratio, and response time.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)
Article
Chemistry, Physical
Qichang Hu, Zhao Wang, Yingru Qiu, Jun Lin, Xiuyu Lin, Xuan Wei, Dapeng Ye, Wei Zheng
Summary: Ternary compound MgTiO3 (MTO) is successfully applied in solar-blind UV photodetectors by investigating the effect of annealing on the structure of MTO thin film and combining MTO with graphene. The MTO-based detector exhibits excellent performance with high open circuit voltage, ultrafast response speed, high responsivity, EQE, and specific detectivity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Engineering, Electrical & Electronic
Congya You, Wenjie Deng, Xiaoqing Chen, Wencai Zhou, Zilong Zheng, Boxing An, Songyu Li, Bo Wang, Yongzhe Zhang
Summary: This study presents a vertically stacked tunneling photodetector based on WSe2/graphene/WS2 van der Waals heterostructure. By introducing graphene film into the WSe2/WS2 interface, the interface composition was improved and Fowler-Nordheim tunneling was enhanced. The device shows high responsivity, detectivity, and photocurrent/dark current ratio, outperforming devices without graphene.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2021)
Article
Engineering, Environmental
Akash Gupta, Mukesh Kumar Thakur, Tirta Amerta Effendi, Ruei-San Chen, Hao-Yu Cheng, Kung-Hsuan Lin, Mohammed Bouras, Digvijay Singh Tomar, Hsin Yu Kuo, Surojit Chattopadhyay
Summary: In this study, electrostatically conjugated core-silica shell upconversion nanoparticles (UCNP@SiO2) and gold nanorod (AuNR) nanocomposites combined with graphene were used to demonstrate over 200-fold upconversion fluorescence enhancement. The enhanced fluorescence in UCNP, attributed to a plasmonic effect from AuNR and graphene, was supported by finite difference time domain simulations of electric field distribution. The performance of the hybrid photodetector (PD) with broad photoresponse and fast response times under various illumination conditions was also reported, with the potential application in remote sensing devices.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Physical
Haining Li, Bing Yang, Biao Yu, Nan Huang, Lusheng Liu, Jiaqi Lu, Xin Jiang
Summary: Treatment of hydrogen plasma on silicon nanowires, followed by coatings of nanocrystalline diamond and multilayer graphene, enables enhanced Raman signals with reduced fluorescent background. The graphene-coated nanowires show lower fluorescent background than diamond-coated ones, with a minimum detection limit of 10(7) mol/L and an enhancement factor exceeding 10(4). The stable Raman enhancement is attributed to hydrogen-terminated graphene and the nanowire structure, independent of graphene layers and maintaining stability after exposure to the atmosphere for a month.
APPLIED SURFACE SCIENCE
(2021)
Article
Physics, Applied
Xin Liao, Chang Xu, Zi-Pu Fan, Ying-Ying Lan, Na Li, Chun-Guang Chu, An-Qi Wang, Dong Sun, Zhi-Min Liao
Summary: The combination of 2D Dirac semimetal graphene and 3D counterpart Cd3As2 in Dirac heterostructures can overcome the weak optical absorption in graphene-based devices and the dark current in pure Cd3As2 photodetectors, leading to high-performance photodetectors with broadband detection, high sensitivity, and rapid response.
APPLIED PHYSICS LETTERS
(2023)
Article
Physics, Applied
Tingting Liu, Cheng Zhang, Xiaofeng Li
Summary: In this study, the effect of strain on hot-carrier devices in gold material was investigated using calculations and simulations. The results show that compressive strain can increase hot-electron generation and improve the transport of hot carriers, leading to enhanced quantum efficiency and responsivity of the devices.
JOURNAL OF APPLIED PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Yiru Ma, Huiqi Qu, Wenna Wang, Yueqin Yu, Xinghao Zhang, Bin Li, Lei Wang
Summary: The Si/SiO2@graphene superstructure, fabricated through reducing silicalite-1 and depositing carbon layers, exhibits excellent structural stability and high ion/electron transport rate. The optimized anode delivers outstanding cycling life, rate capability, areal capacity, and mechanical stability. The full cell test using LiFePO4 as the cathode demonstrates a high capacity and the Si/SiO2@graphene superstructure effectively maintains the film in LIBs.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Materials Science, Multidisciplinary
Yuqiang Li, Dan Zhang, Lemin Jia, Siqi Zhu, Yanming Zhu, Wei Zheng, Feng Huang
Summary: A judiciously designed strategy involving the use of an ultra-thin conductive Ga2O3:Si nanolayer has been demonstrated for preparing a high-quality (Al0.68Ga0.32)(2)O-3 crystalline film with a broadened bandgap. The resulting photodetector showed promising performance with a high on-off ratio, open-circuit voltage, and responsivity, indicating the potential of the strategy for improving (AlGa)(2)O-3 sesquioxides for VUV photodetection applications.
SCIENCE CHINA-MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Svetlana I. Serebrennikova, Daria S. Kopylova, Yuriy G. Gladush, Dmitry V. Krasnikov, Sakellaris Mailis, Albert G. Nasibulin
Summary: Phototransistors utilizing sparse networks of SWCNTs on a silicon/silica substrate demonstrated high sensitivity and excellent performance, making them suitable for detecting extremely weak signals.
Article
Chemistry, Physical
Shaoqin Pan, Shuo-En Wu, Jinjin Hei, Zhiwen Zhou, Longhui Zeng, Yakun Xing, Pei Lin, Zhifeng Shi, Yongtao Tian, Xinjian Li, Di Wu
Summary: In this study, a MoSe2/pyramid Si mixed-dimensional van der Waals heterojunction array is presented for broadband photodetection and imaging. The photodetector exhibits a wide spectral response range, high responsivity, and ultrafast response time due to enhanced optical absorption and high-quality van der Waals heterojunction. Moreover, the photodetector array demonstrates outstanding broadband image sensing capability. This research provides a novel development route for high-performance and broadband photodetector array by MoSe2/pyramid Si mixed-dimensional heterojunction.
Article
Chemistry, Analytical
Rabiaa Elkarous, Afrah Bardaoui, Jerome Borme, Nabil Sghaier, Pedro Alpuim, Diogo M. F. Santos, Radhouane Chtourou
Summary: This study proposes a high-performance asymmetric gold/graphene/platinum photodetector that operates without bias. It incorporates interdigitated metallic contacts to enhance the separation and collection of photocarriers. By utilizing chemical vapor deposition and electron-beam lithography, three devices with different dimensions were fabricated and evaluated for their photoresponsivities at different wavelengths. The 100 μm device exhibited the highest photoresponsivity of 358 A/W at 400 nm illumination. These findings demonstrate the potential of the proposed design to increase the active area, improve light absorption, and achieve efficient separation and collection of photogenerated carriers, making it highly relevant for optoelectronic applications.
Article
Chemistry, Multidisciplinary
Zhikang Wu, Feifei Li, Xiya Li, Yang Yang, Xiao Huang, Hai Li
Summary: This article introduces the improvement of optoelectronic application of graphene and GONS by wrapping ammonium tetrathiomolybdate into GONS and converting it into MoS2 nanosheets and RGO through thermal annealing. The as-prepared MoS2@RGONS shows a much better photoresponse than pure RGONS under visible light. Therefore, MoS2@RGONS is expected to be a promising material in the fields of optoelectronic devices and flexible electronics.