Article
Physics, Applied
M. Oleszko, A. Felix, R. Tomala, M. Chaika, W. Strek
Summary: This study investigates the effect of vacuum level on laser induced white emission (LIWE) of graphene foam and compares it with the electric incandescence of tungsten wire. The increase in pressure inside the dynamic vacuum chamber reduces the emission intensity of LIWE, while it has no effect on the emission of the electrically driven tungsten wire. A similar dependency is observed in the case of field emission (FE) of carbon cathodes. This analogy confirms that white emission and FE are coincident processes occurring during laser excitation of graphene foam.
APPLIED PHYSICS LETTERS
(2023)
Article
Chemistry, Physical
Yongjian Li, Xinlu Li, Li Luo, Yuchen Meng, Zhen Qin, Jialong He, Ronghua Wang
Summary: In this work, vertical graphene was grown in controllable patterns through macro-geometric modulation of nickel substrates, leading to a decrease in the turn-on electric field and reduced current variation. The outstanding field emission properties of patterned vertical graphene (PVG) were attributed to the weakening of field shielding and stronger contribution from VG grown on Ni aggregation. SEM and TEM observations confirmed the structural stability of VG and its connection to the substrate. The results provide insights into the influence of structural stability on field emission properties.
SURFACES AND INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Alberto Anadon, Adrian Gudin, Ruben Guerrero, Iciar Arnay, Alejandra Guedeja-Marron, Pilar Jimenez-Cavero, Jose Manuel Diez Toledano, Fernando Ajejas, Maria Varela, Sebastien Petit-Watelot, Irene Lucas, Luis Morellon, Pedro Antonio Algarabel, Manuel Ricardo Ibarra, Rodolfo Miranda, Julio Camarero, Juan Carlos Rojas-Sanchez, Paolo Perna
Summary: The study shows that a graphene monolayer between Co and a heavy metal (HM) can effectively preserve the spin current injected into the HM from the bottom Co layer, as revealed by thermo-spin measurements. The presence of the graphene monolayer leads to a reduction in the sum of spin Seebeck and interfacial contributions, independent of the spin Hall angle sign of the HM used.
Article
Chemistry, Physical
Qianyu Ji, Bowen Wang, Yajuan Zheng, Xueping Yan, Fanguang Zeng, Bingheng Lu
Summary: The study introduces bulk graphene/carbon nanotubes hybrid materials for field emission applications, showcasing excellent stability and high efficiency. These bulk emitters are suitable for high-power cold cathode applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Physics, Applied
Michael Davidovich, Igor S. Nefedov, Olga E. Glukhova, Michael M. Slepchenkov
Summary: A static model is proposed for calculating tunneling current in vacuum resonant tunneling triodes and tetrodes with control grids. The model allows for the inclusion of one or two grids in the structure, particularly those under the same voltage. It demonstrates the possibility of high current densities up to 10^(13) A/m(2) in structures with double quantum wells.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Nanoscience & Nanotechnology
Filippo Giubileo, Daniele Capista, Enver Faella, Aniello Pelella, Woo Young Kim, Paola Benassi, Maurizio Passacantando, Antonio Di Bartolomeo
Summary: This experimental study investigates the field emission properties of commercially available graphene flowers cloth. Material characterization confirms the formation of high-quality vertical few-layers graphene nanosheets. The results demonstrate a low turn-on field and a high field enhancement factor in a small cathode-anode separation distance range. The study also shows that the turn-on field increases with distance while the field enhancement factor decreases. Additionally, the time stability of the field emission current is reported.
ADVANCED ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Physical
Xiaoqiao Ma, Bin He, Jinrui Guo, Jiale Han, Wenqi Gao, Jiaqing Wang, Yue Han, Hong Fang, Weiming Lu
Summary: In this study, a transistor composed of graphene and PZT was fabricated, and it was found that applying voltage to PZT can result in hysteresis in the graphene transport curve, thus tuning the conductivity of graphene. This provides a new strategy for designing electronic devices based on 2D materials.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Engineering, Environmental
Wentao Huang, Xibing Li, Xiaoyan Sun, Xifeng Ding, Yanjie Feng, Yinghua Tang, Panpan Zhou, Lixi Wang, Qitu Zhang
Summary: Research has shown that synthesizing GQDs/layered double hydroxides and microwave post-treatment can enhance the photoluminescence quantum yields of GQDs. This work points out a new direction for improving the PLQYs of GQDs and demonstrates the potential application in outdoor anti-counterfeiting inks.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Optics
Jingshu Guo, Chaoyue Liu, Laiwen Yu, Hengtai Xiang, Yuluan Xiang, Daoxin Dai
Summary: Graphene-silicon-graphene waveguide photodetectors operating at wavelengths of 1.55 and 2 μm are demonstrated with potential for large-scale integration. The photodetectors exhibit high bandwidth, ultra-low dark current, high photo-to-dark current ratio, and high linear dynamic range.
LASER & PHOTONICS REVIEWS
(2023)
Article
Chemistry, Multidisciplinary
Hua-Yi Hsu, Jing-Shyang Yen, Chun-Yu Lin, Chi-Wen Liu, Kaviya Aranganadin, Chii-Ruey Lin, Jwo-Shiun Sun, Ming-Chieh Lin
Summary: This work presents numerical and experimental studies of a microwave plasma jet chemical vapor deposition (MPJCVD) system for diamond film growth. A three-dimensional plasma fluid model is constructed and optimized to investigate the MPJCVD system and its operating conditions. The system successfully fabricates a diamond film on a graphite substrate with extraordinary field emission properties, such as high current density and low turn-on voltage. The developed model provides valuable insights for improving the performance of MPJCVD systems and may find applications in surface hardening and field electron emission.
APPLIED SCIENCES-BASEL
(2023)
Article
Chemistry, Multidisciplinary
Zongqi Bai, Yang Xiao, Qing Luo, Miaomiao Li, Gang Peng, Zhihong Zhu, Fang Luo, Mengjian Zhu, Shiqiao Qin, Kostya Novoselov
Summary: The emergence of two-dimensional materials has led to important applications in electronic and optoelectronic devices. However, there are limitations such as low ON/OFF ratio and Schottky barrier formation. In this study, highly tunable field-effect tunneling transistors based on vertical graphene-WS2-graphene heterostructures were demonstrated, overcoming these limitations and achieving low off-state current, high ON/OFF ratio, and controllable carrier transport polarity.
Article
Materials Science, Multidisciplinary
Qianyu Ji, Bowen Wang, Yajuan Zheng, Fanguang Zeng, Bingheng Lu
Summary: In this study, a novel bulk graphene emitter with outstanding field emission performance and stability was proposed and demonstrated. The bulk emitter, fabricated by cold pressing high quality graphene, exhibited low turn-on and threshold electric fields, high maximum current density, and stable emission for an extended period of time.
DIAMOND AND RELATED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Tianzeng Hong, Runze Zhan, Yu Zhang, Shaozhi Deng
Summary: This study successfully grew high crystallinity VFLG using a template method, showing excellent field emission performance and current density. It provides a simple and effective method for realizing the pattern growth of VFLG.
Article
Multidisciplinary Sciences
Hyungsik Kim, Young Duck Kim, Tong Wu, Qingrui Cao, Irving P. Herman, James Hone, Jing Guo, Kenneth L. Shepard
Summary: This study reports on the emission of bright visible light from single atoms bridging a graphene nanogap, as well as the observation of a negative differential resistance. Ionized oxygen atoms, after bridging carbon atoms in the nanogap, produce a high peak-to-valley current ratio and peak current density, demonstrating highly reproducible light emission.
Article
Materials Science, Multidisciplinary
Pravin R. Dusane, Dnyaneshwar S. Gavhane, Pankaj S. Kolhe, Prashant K. Bankar, Balu R. Thombare, Gaurav S. Lole, Bharat B. Kale, Mahendra A. More, Shankar Patil
Summary: The study examines the field emission properties of Pd-decorated graphene nanosheets and finds that Pd3-Gr field emitter exhibits the best performance with lower turn-on field, threshold field, and maximum emission current density.
MATERIALS RESEARCH BULLETIN
(2021)
Article
Engineering, Electrical & Electronic
Bangyan Zeng, Xianghong Zhang, Changsong Gao, Yi Zou, Xipeng Yu, Qian Yang, Tailiang Guo, Huipeng Chen
Summary: With high efficiency and low energy consumption, bio-inspired artificial neuromorphic systems have attracted tremendous attention. In this work, an artificial optoelectronic neural device based on an Ag/MXene/SiO2/Si structure is demonstrated. By introducing an oxidized MXene (O-MXene) layer, photoelectric integration can be realized on a single device, which efficiently accelerates the firing behavior of neurons. Additionally, a 64 x 64 sensing array based on optoelectronic neurons is successfully designed and demonstrated for signal recognition and sharpening.
IEEE TRANSACTIONS ON ELECTRON DEVICES
(2023)
Article
Materials Science, Multidisciplinary
Chaomin Mao, Songman Ju, Jinping Zheng, Yueting Zheng, Zhongwei Xu, Lihua Lin, Hailong Hu, Kaiyu Yang, Tailiang Guo, Fushan Li
Summary: This study fabricates high-resolution perovskite quantum dot LEDs (PQLEDs) using nanoimprint technique, which can achieve massive pixel density displays with high color purity, efficiency, and wide color gamut.
ADVANCED OPTICAL MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Jianpu Lin, Hongxing Xie, Yun Ye, Tailiang Guo
Summary: This paper presents a photoluminescent quantum dot (QD) printing paste for light guide dots array used in the backlight of liquid crystal display (LCD). Different solvents were used to prepare and characterize the QD printing paste, which was then enhanced with an oxygen inhibitor called triphenyl phosphite (TPP) to improve its stability. The QD printing paste was used in screen printing to fabricate a QD light guide plate (LGP) with silicon dioxide (SiO2) light scattering particles. The QDs LGP achieved a color gamut of 131.6%NTSC due to light scattering interaction among blue LED, red QDs, green QDs, and SiO2 particles. The study shows that the QDs-chloroform printing paste has uniform light output and the highest photoluminescent peak intensity, making it a promising option for the LCD backlight with its simple process, high production efficiency, and low cost.
JOURNAL OF THE SOCIETY FOR INFORMATION DISPLAY
(2023)
Article
Engineering, Electrical & Electronic
Wenwen Wang, Yongai Zhang, Chaoxing Wu, Qun Yan, Tailiang Guo, Xiongtu Zhou
Summary: A microfabrication method based on bifocal microlens arrays (MLAs) is proposed to improve the depth of field (DOF) in integral imaging display. The bifocal MLAs, fabricated using two-step photolithography and thermal reflow, allow high spatial resolution and accurate depth estimation by using microlenses of different focal lengths. Hexagonally packaged bifocal MLAs show extended DOF from 0.004 to 4.908 mm for 57.6 μm lens diameter, with corresponding object distance ranges from 0.125 to 0.165 mm.
JOURNAL OF THE SOCIETY FOR INFORMATION DISPLAY
(2023)
Article
Engineering, Electrical & Electronic
Yao Li, Haonan Jiang, Yinguo Yan, Yongzhen Liu, Ziping Zhou, Enguo Chen, Yun Ye, Sheng Xu, Qun Yan, Tailiang Guo
Summary: This paper presents a pico-projector design based on micro-LED (mu LED) light sources, which includes a highly integrated microlens array to improve system efficiency and a set of four-piece spherical lens group to achieve compact size. The simulation results show that the mu LED equipped with the microlens array can increase light energy utilization by about 3.5 times and reduce the size of the pico-projector to 30.18 mm(3). The designed pico-projector has high performance and compact size with great potential for future applications.
JOURNAL OF THE SOCIETY FOR INFORMATION DISPLAY
(2023)
Article
Engineering, Electrical & Electronic
Aochen Du, Wenxiao Zhao, Yun Ye, Enguo Chen, Sheng Xu, Tailiang Guo
Summary: In this paper, Cs(Pb,Sb)Br-3 PQDs@glasses were successfully prepared by traditional methods. The optical characterization showed that Cs(Pb0.7Sb0.3)Br-3 PQDs@glasses have a emission peak at 518 nm and a full width at half maximum of 20 nm, with a photoluminescence quantum yield (PLQY) of 58%. The stability and potential applications of the PQDs@glass were further studied through thermal analysis and combining with ceramic phosphors.
JOURNAL OF THE SOCIETY FOR INFORMATION DISPLAY
(2023)
Review
Engineering, Aerospace
Min Qian, Yi Zhang, Xiaojun Mao, Yang Gao, Xiaoyang Xuan, Min Wu, Yueping Niu, Shangqing Gong
Summary: Flexibility and lightweight are important research topics in space science and technology. However, most photoelectronic devices on spacecraft are currently rigid, which is not suitable for the space environment with irradiations and thermal cycling. This review presents the synthesis of space-durable photoelectronic materials, the fabrication of flexible devices, and the investigation of irradiation mechanisms. These advancements lead the development of flexible and lightweight space science and technology.
PROGRESS IN AEROSPACE SCIENCES
(2023)
Correction
Engineering, Electrical & Electronic
Xiang Zhang, Anlan Chen, Tao Yang, Junhu Cai, Yuanyuan Ye, Enguo Chen, Sheng Xu, Yun Ye, Jie Sun, Qun Yan, Tailiang Guo
IEEE PHOTONICS JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
Lujian Liu, Qizhen Chen, Huaan Zeng, Liuting Shan, Chuanbin An, Bingyong Zhuang, Huipeng Chen, Tailiang Guo, Wenping Hu
Summary: Artificial synaptic devices are important for artificial neural networks. In this study, a quantum-dot light-emitting synaptic transistor capable of dual output of optoelectronic signals is demonstrated. The device can exhibit dual responses of electrical and optical signals and successfully simulate key synaptic functions, showing potential for the development of neuromorphic computing.
ADVANCED MATERIALS TECHNOLOGIES
(2023)
Article
Chemistry, Multidisciplinary
Kuan Ju, Yue Miao, Qi Li, Yabin Yan, Yang Gao
Summary: In this study, the laser direct writing method was used to successfully pyrolyze MnCO3/carboxymethylcellulose (CMC) precursors into MnO2/carbonized CMC (LP-MnO2/CCMC) in a one-step and mask-free manner to meet the requirements of environmentally friendly, simple, and effective material synthesis. CMC was utilized as a combustion-supporting agent to promote the conversion of MnCO3 into MnO2. The selected materials have advantages such as solubility of MnCO3, eco-friendly and soluble carbonaceous nature of CMC, and easy removal of redundant precursor using deionized water. The electrochemical performance of LP-MnO2/CCMC(R1) and LP-MnO2/CCMC(R1/5) composites with different mass ratios of MnCO3 and CMC was investigated. LP-MnO2/CCMC(R1/5)-based electrode exhibited high specific capacitance (74.2 F/g at 0.1 A/g) and good electrical durability for 1000 charging-discharging cycles. The sandwich-like supercapacitor assembled with LP-MnO2/CCMC(R1/5) electrodes showed a maximum specific capacitance of 49.7 F/g at 0.1 A/g. Furthermore, the LP-MnO2/CCMC(R1/5)-based energy supply system successfully powered a light-emitting diode, demonstrating the great potential of LP-MnO2/CCMC(R1/5)-based supercapacitors for power devices.
Article
Nanoscience & Nanotechnology
Haobing Zhao, Hailong Hu, Jinping Zheng, Yuan Qie, Kuibao Yu, Yangbin Zhu, Zhiqi Luo, Lihua Lin, Kaiyu Yang, Tailiang Guo, Fushan Li
Summary: By using a safe phosphorus source, narrow bandwidth InP/ZnSeS/ZnS quantum dots with high photoluminescence quantum yield and narrow emission spectrum were synthesized, showing potential applications in high-performance display devices.
ACS APPLIED NANO MATERIALS
(2023)
Article
Instruments & Instrumentation
Zhenglin Li, Taotao Ding, Biao Xiao, Yang Gao, Yanxun Xiang, Fuzhen Xuan
Summary: In this study, a multifunctional sensing layer (MSL) integrated with flexible multi-functional sensing units and stretchable interconnectors was developed using a laser-microfabrication (LMF) method. The MSL showed high sensitivity, durability, and temperature coefficient, making it suitable for various applications in structural health monitoring (SHM).
SMART MATERIALS AND STRUCTURES
(2023)
Article
Chemistry, Multidisciplinary
Aochen Du, Debing Shen, Wenxiao Zhao, Yongzhen Liu, Xinzhi Qin, Zexi Lin, Yun Ye, Enguo Chen, Sheng Xu, Tailiang Guo
Summary: In this study, the electronic structure, phonon dispersion, and vibrational properties of BA(2)PbI(4) crystals were revealed using density functional theory. The stability diagram of formation enthalpy was calculated, and the crystal structure was characterized through Rietveld refinement. The excellent photoelectric properties of BA(2)PbI(4) crystals were confirmed through the design of a contactless fixed-point lighting device and the study of photoelectrochemical properties.
Article
Chemistry, Multidisciplinary
Lei Wang, Xinqi Yao, Shuaishuai Yuan, Yang Gao, Ruhang Zhang, Xinhai Yu, Shan-Tung Tu, Shijian Chen
Summary: An ultra-high performance humidity sensor based on CuO/Ti3C2TX MXene was investigated in this study. The moisture-sensitive material was fabricated using a self-assembly method and characterized using various techniques. The results showed that the humidity sensor exhibited high sensitivity, short response and recovery time, low hysteresis, and good repeatability. The CuO/Ti3C2TX sensor demonstrated great potential in various applications such as respiration rate monitoring and environmental detection.
Proceedings Paper
Optics
Zhenyu Zeng, Hongxing Xie, Yaqian Zheng, Sijie Li, Yun Ye, TaiLiang Guo
Summary: In this study, quantum dots were added into masterbatches to prepare composite components with diffusion and color conversion functions. The resulting QD color masterbatch exhibited uniform dispersion, controllable concentration, and good luminescence performance. This study demonstrates the potential application of QD masterbatches in high-performance QD display devices.
OPTICAL DESIGN AND TESTING XII
(2023)
