Article
Chemistry, Physical
Yue Zhang, Fakun Wang, Xuan Zhao, Xin Feng, Na Zhang, Fangfang Xia, Ying Ma, Huiqiao Li, Tianyou Zhai
Summary: The researchers propose an effective strategy to improve the responsivity and response speed of 2D LMPC-based UV photodetectors by sensitizing them with a 2D RP perovskite. The hybrid heterojunction photodetectors exhibit high responsivity, large detectivity, and fast response time.
NANOSCALE HORIZONS
(2022)
Article
Optics
S. Lischke, A. Peczek, J. S. Morgan, K. Sun, D. Steckler, Y. Yamamoto, F. Korndoerfer, C. Mai, S. Marschmeyer, M. Fraschke, A. Krueger, A. Beling, L. Zimmermann
Summary: By sandwiching a germanium fin between complementary in situ-doped silicon layers, a high-performance waveguide-coupled germanium photodiode is achieved, showing high internal responsivities and low dark currents at a wavelength of 1,550 nm. This novel device concept enables photodetectors with outstanding performance, with internal bandwidth-efficiency products reaching 86 GHz.
Article
Multidisciplinary Sciences
S. Marconi, M. A. Giambra, A. Montanaro, V Miseikis, S. Soresi, S. Tirelli, P. Galli, F. Buchali, W. Templ, C. Coletti, V Sorianello, M. Romagnoli
Summary: Graphene, with its fast carrier dynamics and ultra-broadband optical properties, is suitable for optical communications applications. By integrating a photo-thermo-electric graphene photodetector on a silicon waveguide, direct detection of 105 Gbit s(-1) non-return to zero and 120 Gbit s(-1) 4-level pulse amplitude modulation optical signals can be achieved.
NATURE COMMUNICATIONS
(2021)
Article
Optics
Anupam Chetia, Dibyajyoti Saikia, Satyajit Sahu
Summary: Numerical simulation methods have been used to optimize the performance of perovskite-based photodetectors, resulting in higher current density, quantum efficiency, and responsivity. These improvements were achieved through optimizing the different layers and material properties of the device.
Article
Engineering, Electrical & Electronic
Hao Suo, Shuming Yang, Peirui Ji, Yiming Wang
Summary: This paper discusses a graphene photodetector modified with both gold nanoparticles and silver nanoparticles, improving its photoresponse and performance. Through the use of a common electrode structure and localized surface plasmon excitation, the photodetector showed increased responsivity in specific wavelength ranges.
SENSORS AND ACTUATORS A-PHYSICAL
(2021)
Article
Physics, Applied
Yi Wang, Yaoqiang Zhou, Zunyue Zhang, Shuqi Xiao, Jian-bin Xu, Hon Ki Tsang
Summary: In this work, a high-speed waveguide-integrated photodetector using two-dimensional materials is proposed and experimentally demonstrated. The detector exhibits high responsivity and speed performance.
APPLIED PHYSICS LETTERS
(2022)
Article
Physics, Applied
Yichi Zhang, Bo Wang, Liming Wang, Jifang Shao, Maolong Yang, Hao Sun, Ningning Zhang, Zuimin Jiang, Huiyong Hu
Summary: By utilizing special flask-shaped Au grating-Ge nanowire arrays, the performance of a Ge photodetector in the infrared optical communication band is significantly improved, with the responsivity nearly doubling. The enhancement is attributed to the excitation of surface plasmon polaritons, enhancing inter-band transition absorption and internal photoemission, leading to a dual-band photodetection capability.
APPLIED PHYSICS LETTERS
(2021)
Article
Chemistry, Analytical
Gabriel Omar Mendoza Conde, Jose Alberto Luna Lopez, Zaira Jocelyn Hernandez Simon, Jose Alvaro David Hernandez de la Luz, Godofredo Garcia Salgado, Erick Gastellou Hernandez, Haydee Patricia Martinez Hernandez, Javier Flores Mendez
Summary: The study showed that MIS-type structures exhibit good I-V and I-t properties under white light illumination and serve as responsive photodetectors. Electrical measurements revealed a significant increase in photocurrent under reverse bias. The structures demonstrate excellent responsivity and specific detectivity values, making them suitable for photodetection applications.
Article
Chemistry, Analytical
Shiu-Ming Huang, Jai-Lung Hung, Mitch Chou, Chi-Yang Chen, Fang-Chen Liu, Ruei-San Chen
Summary: Broadband photosensors have been widely studied in various materials, with recent research focusing on finding a wavelength-insensitive photosensor. Photocurrent measurements in Sb2Te3 flakes show insensitivity to a wide range of wavelengths, with the observed photocurrent primarily originating from band structure peak transitions. This indicates that bulk state band structure is the main source of the observed photocurrent, challenging the common explanation that the carrier mainly comes from surface states in low-dimensional materials.
Review
Materials Science, Multidisciplinary
Vinod Panwar, Sukanta Nandi, Mandira Majumder, Abha Misra
Summary: This article discusses the efforts to develop self-powered photodetectors (PDs) using ZnO-based heterointerfaces for an improved pyro-phototronic effect. It focuses on the pyro-phototronic effect, exploring ZnO-based materials, doped ZnO-based materials, and ZnO-based materials with the plasmonic effect. The article concludes with a discussion on the challenges in the state-of-the-art technology and possible directions for future research.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Engineering, Electrical & Electronic
Saba Khalili, Hossein Mahmoudi Chenari, Zeynep Orhan, Fatma Yildirim, Sakir Aydogan
Summary: We present a photodetector composed of electrospun SnO2 nanofibers on an n-type Si wafer, forming a SnO2 NFs/n-Si heterojunction architecture. The microstructure of the SnO2 NFs was analyzed using advanced X-ray diffraction. Optical properties were studied through DRS spectrum and photoluminescence measurements. In addition, the electrical characteristics of the SnO2 NFs/n-Si device, such as current-voltage, capacitance/conductance-voltage, and capacitance-frequency measurements, were analyzed in the dark. The photodetector characteristics, including ON/OFF ratio, detectivity, and responsivity, were also investigated under different light intensities.
SENSORS AND ACTUATORS A-PHYSICAL
(2022)
Article
Materials Science, Ceramics
H. Ferhati, A. Bendjerad, F. Djeffal, A. Benhaya, A. Saidi
Summary: A high-performance multispectral photodetector based on p-NiO/Ag/n-ITO heterostructure was fabricated using RF magnetron sputtering technique at room temperature. The device showed high absorbance and enhanced performance under UV, visible, and NIR lights, indicating potential for various optoelectronic applications. The broadband photodetection property enabled by the optimized NiO/Ag/ITO heterostructure opens new possibilities for low-cost devices with multiple sensing purposes.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Multidisciplinary
Yang-Yen Yu, Yan-Cheng Peng, Yu-Cheng Chiu, Song-Jhe Liu, Chih-Ping Chen
Summary: In this study, a ternary blend strategy was used to prepare high-performance organic photodiodes with extremely low dark current, high cut-off frequency, and high responsivity. Optimization of the morphologies and energy level alignment of the blend films led to the achievement of these excellent performances.
Article
Chemistry, Multidisciplinary
Guigang Zhou, Huancheng Zhao, Xiangyang Li, Zhenhua Sun, Honglei Wu, Ling Li, Hua An, Shuangchen Ruan, Zhengchun Peng
Summary: This paper proposes a facile liquid-exfoliating method to prepare high-quality SnS2 nanosheets and fabricates a flexible photodetector using the SnS2 nanosheets with a graphene-PTAA hybrid structure. The photodetector shows high responsivity and detectivity from ultraviolet to near infrared. Furthermore, the flexible photodetector exhibits nearly invariable performance over bending cycles, making it suitable for wearable applications.
Article
Materials Science, Multidisciplinary
Carmine Borelli, Alessio Bosio, Antonella Parisini, Maura Pavesi, Salvatore Vantaggio, Roberto Fornari
Summary: The electrical and optical properties of high-resistivity kappa-Ga2O3 epitaxial films are studied, and their performance as solar-blind photodetectors is investigated. The photodetectors exhibit a high rejection ratio, reproducible on-off switching times, and significant photo-gain. The material shows non-critical growth conditions, intrinsic spectral selectivity, and good UV-detection performance, making it suitable for solar-blind ultraviolet photodetectors.
MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS
(2022)
Article
Nanoscience & Nanotechnology
Hong-Xiang An, Bao-Shi Qiao, Zhi-Hong Zhang, Zhen-Dong Lian, Zhipeng Wei, Xiao-Shuang Li, Qing-Guang Zeng, Bo Wang, Kar Wei Ng, Shuang-Peng Wang
Summary: High-quality RbCu2I3 microwires were successfully synthesized by a fast-cooling hot saturated solution method. The microwires exhibited an orthorhombic structure with a smooth surface. Optical measurements showed sharp ultraviolet absorption and ultralarge Stokes shift (300 nm) in photoluminescence of RbCu2I3 microwires. The photodetector based on a single RbCu2I3 microwire demonstrated excellent ultraviolet detection performance, with a specific detectivity of 5.0 x 10(9) Jones and a responsivity of 380 mA center dot W-1. The synthesis method and physical properties of RbCu2I3 can guide the future optoelectronic application of this new material.
Review
Chemistry, Physical
Pengfei Zhou, Haoyun Bai, Jinxian Feng, Di Liu, Lulu Qiao, Chunfa Liu, Shuangpeng Wang, Hui Pan
Summary: Alkaline water electrolysis (AWE) is the most established technology for producing green hydrogen, but its high cost limits its market penetration. Developing low-cost and efficient electrocatalysts that can be produced on an industrial scale is crucial for improving the market share. Bulk Fe-based alloys are promising candidates due to their low cost, abundance, stability, and suitability for mass production. This review provides a comprehensive summary of recent strategies to enhance the catalytic activity of bulk Fe-based alloys and discusses their prospects in industrial AWE.
JOURNAL OF MATERIALS CHEMISTRY A
(2023)
Article
Materials Science, Multidisciplinary
Pengfei Zhou, Po Kee Wong, Pengda Niu, Mingpeng Chen, Chi Tat Kwok, Yuxin Tang, Ruidi Li, Shuangpeng Wang, Hui Pan
Summary: Alkaline water electrolysis is a prospective method for green hydrogen production, but its efficiency is low. The use of anodized high-entropy alloy AlCoCrFeNi as an efficient electrode shows ultra-high catalytic activity and stability, making it suitable for industrial water electrolysis for hydrogen production.
SCIENCE CHINA-MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Bao-Shi Qiao, Su-Yun Wang, Zhi-Hong Zhang, Zhen-Dong Lian, Zhi-Yao Zheng, Zhi-Peng Wei, Lin Li, Kar Wei Ng, Shuang-Peng Wang, Zhi-Bo Liu
Summary: Stacked 2D perovskites offer new possibilities for next generation photodetectors with enhanced features. This study demonstrates a bifunctional perovskite-based photovoltaic detector capable of demultiplexing two wavelengths. By utilizing the photosensitive and dielectric properties of 2D perovskite, the device exhibits different modes of operation. It shows continuous photoresponse under 405 nm and a transient spike response to longer wavelength visible light. This work provides a new strategy for multispectral detection and demultiplexing, which can improve data transfer rates and encrypted communications.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Jun Yan, Qi Zheng, Shuang-Peng Wang, Yong-Zhi Tian, Wei-Qiang Gong, Feng Gao, Ji-Jun Qiu, Lin Li, Shu-Hui Yang, Mao-Sheng Cao
Summary: High-efficiency electromagnetic functional materials are essential for high-performance electromagnetic absorbers and devices in various fields. Finding and realizing these materials pose great challenges.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Physical
Di Liu, Lulu Qiao, Yuyun Chen, Pengfei Zhou, Jinxian Feng, Chon Chio Leong, Kar Wei Ng, Shengjie Peng, Shuangpeng Wang, Weng Fai Ip, Hui Pan
Summary: In this study, the incorporation of manganese into the Co3O4 lattice is found to achieve high activity and selectivity in electrocatalytic nitrate reduction reaction (e-NO3RR). The Mn-incorporated Co3O4 nanotubes exhibit remarkable e-NO3RR activity with a high ammonia yield rate of 35 mg h-1 cm-2 and excellent selectivity with a Faraday efficiency for ammonia up to 99.5% in neutral media, outperforming transition-metal oxides.
APPLIED CATALYSIS B-ENVIRONMENTAL
(2023)
Review
Engineering, Environmental
Mingpeng Chen, Di Liu, Lulu Qiao, Pengfei Zhou, Jinxian Feng, Kar Wei Ng, Qingju Liu, Shuangpeng Wang, Hui Pan
Summary: The dynamical processes in electrochemical reactions in electrocatalysis are not well understood, which leads to wasted efforts in the design of electrocatalysts. However, in-situ/operando Raman technique can provide guidance for the design of electrocatalysts. This review summarizes recent advances of in-situ/operando Raman studies in different electrocatalytic systems and their applications in understanding the mechanisms.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Di Liu, Jia Zhao, Youchao Kong, Haoqiang Ai, Haoyun Bai, Chon Chio Leong, Kin Ho Lo, Shuangpeng Wang, Weng Fai Ip, Sen Lin, Hui Pan
Summary: This study investigates the production of C2 fuels through the electrocatalytic carbon monoxide reduction reaction (e-CORR) using dual-atom catalysts (DACs). Methanol, ethanol, ethylene, and acetate can be produced on DAC-Co and DAC-Cu, but with different preferences. The presence of solvent enhances adsorption and influences the protonation steps, thus affecting the performance and selectivity of e-CORR on DACs.
Article
Chemistry, Physical
Xin Zhang, Hui Bao, Cuili Chen, Xian-Gang Wu, Menglin Li, Wenyu Ji, Shuangpeng Wang, Haizheng Zhong
Summary: The operational stability of red emissive CdSe QLEDs was investigated at different applied voltages. The device luminance quickly decreases when loaded around the turn-on voltage, but recovers after unloading or slight heat treatment, known as the fatigue effects of operational QLED. The decrease in device luminance is attributed to the reduction of quantum yield in quantum dots.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Chemistry, Physical
Hui Bao, Cuili Chen, Yongqi Cao, Shuai Chang, Shuangpeng Wang, Haizheng Zhong
Summary: In this study, the charge accumulation and recombination in an operational QLED were quantitatively determined using time-resolved electroluminescence (TREL) spectroscopy. Time-resolved current (TRC) measurement was introduced and simulated using an equivalent circuit model, including a series resistance, a parallel resistance, and a capacitance. The key processes in a typical TREL spectra were modeled, and the stages of delay, rising, and decay were correlated to charge accumulations, charge injection and recombination, and charge release and recombination, respectively. The electroluminescence recombination rate was derived by fitting the rising stage curves in the TREL spectra, providing an intrinsic parameter of the emissive materials.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
Article
Materials Science, Multidisciplinary
Chunrong Zhu, Chenjing Zhao, Fang Yuan, Yuren Li, Jingrui Li, Xiaoyun Liu, Lu Li, Hua Dong, Lihe Yan, Shuangpeng Wang, Bo Jiao, Zhaoxin Wu
Summary: This study introduces a subtly functionalized compound, methoxylated phenethylammonium bromide (y-MeO-PEABr), to improve the performance of sky-blue quasi-2D perovskite materials. The compound induces an upward shift of the energy levels and reduces the holes injection barrier, achieving better charge balance. The introduction of large y-MeO-PEA(+) cations effectively suppresses the formation of undesirable phases and improves energy transfer. The sky-blue quasi-2D PeLED based on 2-MeO-PEABr achieves a maximum external quantum efficiency of 10.85% at 486 nm. This work suggests a potential guide for designing high-performance blue quasi-2D PeLEDs using novel organic spacer cations.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Nanoscience & Nanotechnology
Chenjing Zhao, Chunrong Zhu, Yue Yu, Wenhao Xue, Xiaoyun Liu, Fang Yuan, Jinfei Dai, Shuangpeng Wang, Bo Jiao, Zhaoxin Wu
Summary: By using 2-thiophenepropylamine bromide (ThPABr) as a multifunctional ligand in CsPbBr3 quantum dots, the film's photoluminescence quantum yield (PLQY) was increased to 83%, and the green LED exhibited significant performance improvement, including ultrahigh spectral stability, a maximum external quantum efficiency of 10.5%, and an extended operating lifetime that is 5 times longer than the reference sample.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Physical
Pengfei Zhou, Songbo Chen, Haoyun Bai, Chunfa Liu, Jinxian Feng, Di Liu, Lulu Qiao, Shuangpeng Wang, Hui Pan
Summary: In this study, a simple spontaneous corrosion and cyclic voltammetry (CV) activation method was used to fabricate Zn-incorporated NiFe layered double hydroxide (LDH) on commercial NiFe foam, which showed excellent oxygen evolution reaction (OER) performance.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Physical
Xingshuai Lv, Junxian Liu, Liangzhi Kou, Kar Wei Ng, Shuangpeng Wang, Thomas Frauenheim, Hui Pan
Summary: This study demonstrates that the use of three-dimensional confined dual site environment can significantly improve the turnover frequency for NH3 production, surpassing the limitations of energy-scaling relations and enabling a milder Haber-Bosch process.
Article
Chemistry, Physical
Sujuan Wang, Ligan Qi, Zhonghui Xia, Wenhai Wang, Dewu Yue, Shuangpeng Wang, Shichen Su
Summary: In this study, a polarization-sensitive detector based on a MoTe2/WTe2 heterojunction was presented. It achieved wide spectral detection and high polarization sensitivity, showing potential for developing high-performance optoelectronic devices.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2023)
