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学者姓名：张永爱
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Abstract ：
Due to the simple structure, single-contact light-emitting diode (SC-LED) holds promise for applications in ultrahigh resolution micro-displays. However, the required alternating current (ac) operation poses challenges for grayscale modulation in image display applications. Therefore, it is of great significance to develop a potential grayscale control technology for the ac-driven SC-LEDs. In this work, the optical and electrical characteristics of the SC-LEDs are investigated, and an anomalous pulsewidth modulation (A-PWM) technology is proposed. In the A-PWM mode, the brightness decreases with the increasing pulsewidth, which is totally different from conventional pulsewidth modulation. The carrier transport model and the circuit model are established to clarify the A-PWM mechanism. Furthermore, the brightness division is carried out on the basis of the A-PWM, and the human eye brightness perception model is established. Nonlinear correction is applied to align the brightness change with the characteristics of human eye perception. This work proposes a brightness modulation method suitable for SC-LEDs, which is expected to be applied to ac-driven nano-pixel light-emitting displays.
Keyword ：
Alternating current (ac)-driven Alternating current (ac)-driven anomalous-pulsewidth modulation anomalous-pulsewidth modulation gallium nitride light-emitting diode (GaN-LED) gallium nitride light-emitting diode (GaN-LED) grayscale control grayscale control human perceptual characteristics human perceptual characteristics
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| GB/T 7714 | Xiao, Tianyu , Wang, Kun , Li, Wenhao et al. Anomalous-Pulsewidth Modulation of Single-Contact Light-Emitting Diode for Grayscale Control [J]. | IEEE TRANSACTIONS ON ELECTRON DEVICES , 2024 , 71 (1) : 651-655 . |
| MLA | Xiao, Tianyu et al. "Anomalous-Pulsewidth Modulation of Single-Contact Light-Emitting Diode for Grayscale Control" . | IEEE TRANSACTIONS ON ELECTRON DEVICES 71 . 1 (2024) : 651-655 . |
| APA | Xiao, Tianyu , Wang, Kun , Li, Wenhao , Zhang, Yongai , Zhou, Xiongtu , Lin, Shanling et al. Anomalous-Pulsewidth Modulation of Single-Contact Light-Emitting Diode for Grayscale Control . | IEEE TRANSACTIONS ON ELECTRON DEVICES , 2024 , 71 (1) , 651-655 . |
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In the time of Internet of Things(IoT),alternating current electroluminescence(ACEL)has unique advantages in the fields of smart display and human-computer interaction.However,their reliance on external high-voltage AC power supplies poses challenges in terms of wearability and limits their practical application.This paper proposed an innovative scheme for preparing a feather triboelectric nanogenerator(F-TENG)using recyclable and environmentally friendly material.The highest open-circuit voltage,short-circuit current,and transferred charge of SF6-treated F-TENGs can reach 449 V,63 μA,and 152 nC,which enables easy lighting of BaTiO3-doped ACEL devices.Using a human electrical potential,a single-electrode F-TENG is combined with ACEL device for self-powered fingerprint recognition display.These works achieve self-powered flexible wearable ACEL devices,which are not only efficient and portable but also have good application prospects in the human-computer interaction,functional displays,and wearable electronic devices.
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| GB/T 7714 | Wandi Chen , Haonan Wang , Yibin Lin et al. Self-powered flexible fingerprint-recognition display based on a triboelectric nanogenerator [J]. | 纳米研究（英文版） , 2024 , 17 (4) : 3021-3028 . |
| MLA | Wandi Chen et al. "Self-powered flexible fingerprint-recognition display based on a triboelectric nanogenerator" . | 纳米研究（英文版） 17 . 4 (2024) : 3021-3028 . |
| APA | Wandi Chen , Haonan Wang , Yibin Lin , Xinyan Gan , Heng Tang , Yongai Zhang et al. Self-powered flexible fingerprint-recognition display based on a triboelectric nanogenerator . | 纳米研究（英文版） , 2024 , 17 (4) , 3021-3028 . |
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A vertical integration of indium gallium nitride/gallium nitride (InGaN/GaN)-based microlight-emitting diode (mu LED) and GaN ultraviolet bipolar junction transistor (BJT) phototransistor (UVPT), based on the same GaN material and process platform (UVPT-mu LED), was proposed. The integrated device is a novel integrated device with light-emitting, detecting, sensing, driving and regulating functions. It can be used as a receiver and transmitter. The light-emission effect of the mu LED on UVPT can be regulated by changing the power of an external light. Optical-electrical-optical conversion was conducted with Silvaco TCAD software. Electro-optic modulation characteristics and optical power amplification were attained through a Silvaco TCAD simulation. By optimization of the size and concentration of the device epitaxial, the current gain of the optimized device reaches a maximum of 240. The UVPT-mu LED device shows a strong response to small-power light and a stable response to high-power light. The UVPT-mu LED chip with a high switching ratio was successfully prepared and used to verify the feasibility of the UVPT-mu LED device. The proposed monolithic integrated device not only can be used for traditional displays but also shows great potential in intelligent displays, such as human-computer interactive systems, on-chip optical interconnects, photonic chips and visible-light communications.
Keyword ：
gallium nitride gallium nitride microlight-emitting diode microlight-emitting diode monolithic integration monolithic integration optical-electrical-optical conversion optical-electrical-optical conversion ultraviolet phototransistor ultraviolet phototransistor
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| GB/T 7714 | Su, Wenjuan , Wang, Haonan , Zou, Zhenyou et al. Design and Photomodulation Performance of a UV-Driven Full GaN Integrated μLED and BJT Phototransistor [J]. | ACS PHOTONICS , 2024 , 11 (2) : 649-659 . |
| MLA | Su, Wenjuan et al. "Design and Photomodulation Performance of a UV-Driven Full GaN Integrated μLED and BJT Phototransistor" . | ACS PHOTONICS 11 . 2 (2024) : 649-659 . |
| APA | Su, Wenjuan , Wang, Haonan , Zou, Zhenyou , Chai, Changjing , Weng, Shuchen , Ye, Jinyu et al. Design and Photomodulation Performance of a UV-Driven Full GaN Integrated μLED and BJT Phototransistor . | ACS PHOTONICS , 2024 , 11 (2) , 649-659 . |
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Various techniques based on electronic or optical signals have been developed to perceive body movements, which is essential in several fields such as healthcare, rehabilitation, and human-computer interaction. However, these signals are obtained externally, not from within the body. In this study, we introduce an electronic skin (e-skin) body motion sensor prepared using organic polymers and metal fabric to detect motion through the body's electro-induction (EI) via contact with the ground and shoes or through intrinsic contact electrification of the skin. The device can achieve an EI signal up to 450 V and charge data of 40 V and 2.45 mu A when it is detached from the contacted skin. Moreover, the signal can be automatically extracted and trained using the state-of-the-art deep learning techniques. The sensor can accurately track sleep activity with an accuracy rate of 96.55%. This wearable motion sensor can be seamlessly combined with the Internet of Things technology for multifunctional applications, highlighting its potential applications in human activity recognition and artificial intelligence.
Keyword ：
1D-CNN 1D-CNN contact-separation electrification contact-separation electrification e-skin e-skin human activity recognition human activity recognition sleep motion recognition sleep motion recognition
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| GB/T 7714 | Xu, Jinjie , Chen, Wandi , Liu, Liangjie et al. Intelligent recognition of human motion using an ingenious electronic skin based on metal fabric and natural triboelectrification [J]. | SCIENCE CHINA-MATERIALS , 2024 , 67 (3) : 887-897 . |
| MLA | Xu, Jinjie et al. "Intelligent recognition of human motion using an ingenious electronic skin based on metal fabric and natural triboelectrification" . | SCIENCE CHINA-MATERIALS 67 . 3 (2024) : 887-897 . |
| APA | Xu, Jinjie , Chen, Wandi , Liu, Liangjie , Jiang, Shanshan , Wang, Haonan , Zhang, Jiaxiang et al. Intelligent recognition of human motion using an ingenious electronic skin based on metal fabric and natural triboelectrification . | SCIENCE CHINA-MATERIALS , 2024 , 67 (3) , 887-897 . |
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A smart grid is a new generation power system, which realizes the interconnection of information in intelligent, efficient, and stable operation modes. Thus, high -voltage monitoring is an important part of ensuring efficient power transmission in a smart grid. However, traditional voltage monitors that rely on wired connections have limitations in meeting the adaptability requirement for smart grids. In this work, inspired by the double-TENG structure, we propose a self -powered high -voltage monitoring device with strong anti -interference, namely, the Maxwell's displacement current -driven lighting emitting diode (MDC-LED), and proved that the MDC-LED with four electrodes can reorganize the electric field near the powerline, leading to an approximately uniform electric field. Therefore, the light output from the MDC-LED is highly sensitive to the electrical signal of the powerline and has a strong anti -device vibration. Because of the MDC-LED's high sensitivity to alternating electric fields, it can detect the electric pollution in the powerline, as well as the powerline's vibration frequency and amplitude. We believe the MDC-LED can provide a novel technical approach for the development of detection systems for use in smart grids.
Keyword ：
Lighting emitting diode Lighting emitting diode Maxwell 's displacement current Maxwell 's displacement current Self -powered Self -powered Smart grid Smart grid Triboelectric nanogenerator Triboelectric nanogenerator
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| GB/T 7714 | Li, Wenhao , Wang, Kun , Qiu, Jiawen et al. Self-powered powerline monitor with strong anti-interference based on Maxwell's displacement current-driven LED [J]. | NANO ENERGY , 2024 , 123 . |
| MLA | Li, Wenhao et al. "Self-powered powerline monitor with strong anti-interference based on Maxwell's displacement current-driven LED" . | NANO ENERGY 123 (2024) . |
| APA | Li, Wenhao , Wang, Kun , Qiu, Jiawen , Li, Junlong , Zhang, Shuqian , Chen, Rong et al. Self-powered powerline monitor with strong anti-interference based on Maxwell's displacement current-driven LED . | NANO ENERGY , 2024 , 123 . |
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Quantum dot (QD) light-emitting devices operating in non-carrier-injection electroluminescence (NCI-QDEL) mode have attracted attention due to their extremely simple structure and excellent stability. However, the working mechanisms of the QD-based NCI-QDEL still require further improvement, especially regarding the transfer process of charges between QDs. Noting that there are plenty of salt compounds and organic ligands between QDs during the solution synthesis, which must have an influence on the device performance by impacting the charge transfer process. Thus, it is necessary to reveal effect of the QD surrounding states on the NCI-QDEL performance. In this work, effect of the purification process on the surrounding states of QDs is investigated, and the charge transfer process is elucidated according to the NCI-QDEL performance. It is found that a moderate energy barrier between QDs is helpful to improve NCI-QDEL. We propose a working mode of the QD-based NCI-QDEL, in which the salt compounds and organic ligands between QDs are equivalent to QD-QD energy barriers that can adjust the charge transfer process and increase the electron-hole overlap probability. We believe that this work can provide guidance for the design and fabrication of QDs suitable for NCI devices.
Keyword ：
Energy barrier Energy barrier Light-emitting diode Light-emitting diode Non-carrier injection Non-carrier injection Quantum dot Quantum dot
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| GB/T 7714 | Xie, Biao , Li, Wenhao , Li, Junlong et al. Increasing energy barrier between quantum dots for enhancing non-carrier-injection electroluminescence [J]. | JOURNAL OF LUMINESCENCE , 2024 , 269 . |
| MLA | Xie, Biao et al. "Increasing energy barrier between quantum dots for enhancing non-carrier-injection electroluminescence" . | JOURNAL OF LUMINESCENCE 269 (2024) . |
| APA | Xie, Biao , Li, Wenhao , Li, Junlong , Su, Hao , Qiu, Jiawen , Shi, Baoran et al. Increasing energy barrier between quantum dots for enhancing non-carrier-injection electroluminescence . | JOURNAL OF LUMINESCENCE , 2024 , 269 . |
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Optimizing the driving panel of display to decrease the number of driving lines is of importance to high-resolution displays. Especially, it is important to address the challenge of the increasing number of row and column electrode lines. In this work, an approach for realizing the one line-to-three LEDs driving method employing the noncarrier injection (NCI) operational mode has been demonstrated, and the NCI-LEDs using discrete components are constructed. The operating characteristics and principles of the NCI-LEDs are studied. It is demonstrated that electroluminescent (EL) output states of three parallel NCI-LEDs vary with driving frequency, that is, the NCI-LEDs has frequency-selective properties. Therefore, the separate control of three LEDs under the control of a single signal line is realized, and the subpixel circuit selection of three RGB colors is realized. This driving method can effectively mitigate the complexity of the electrode wiring required by the row-column scanning, which is expected to provide important guidance for the development of high-resolution displays.
Keyword ：
Alternating current (AC) driven Alternating current (AC) driven frequency selection frequency selection light-emitting diodes (LEDs) light-emitting diodes (LEDs) noncarrier injection (NCI) noncarrier injection (NCI) RC circuit RC circuit
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| GB/T 7714 | Zhang, Shuqian , Li, Wenhao , Wang, Kun et al. Noncarrier Injection Mode for Realizing One Line-to-Three LEDs Driving Method [J]. | IEEE TRANSACTIONS ON ELECTRON DEVICES , 2024 , 71 (4) : 2486-2490 . |
| MLA | Zhang, Shuqian et al. "Noncarrier Injection Mode for Realizing One Line-to-Three LEDs Driving Method" . | IEEE TRANSACTIONS ON ELECTRON DEVICES 71 . 4 (2024) : 2486-2490 . |
| APA | Zhang, Shuqian , Li, Wenhao , Wang, Kun , Guo, Yanming , Gong, Zheng , Zhang, Zhipeng et al. Noncarrier Injection Mode for Realizing One Line-to-Three LEDs Driving Method . | IEEE TRANSACTIONS ON ELECTRON DEVICES , 2024 , 71 (4) , 2486-2490 . |
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Indium (In) is currently used to fabricate metal bumps on micro-light-emitting diode (Micro-LED) chips due to its excellent physical properties. However, as Micro-LED pixel size and pitch decrease, achieving high-quality In bumps on densely packed Micro-LED chips often presents more challenges. This paper describes the process of fabricating In bumps on micro-LEDs using thermal evaporation, highlighting an issue where In tends to grow laterally within the photoresist pattern, ultimately blocking the pattern and resulting in undersized and poorly dense In bumps on the Micro-LED chip. To address this issue, we conducted numerous experiments to study the height variation of In bumps within a range of photoresist aperture sizes (3 mu m -7 mu m) under two different resist thickness conditions (3.8 mu m and 4.8 mu m). The results showed that the resist thickness had a certain effect on the height of In bumps on the Micro-LED chip electrodes. Moreover, we found that, with the photoresist pattern size increasing under constant resist thickness conditions, the height and quality of the bumps significantly improved. Based on this finding, we rationalized the adjustment of the photoresist pattern size within a limited emission platform range to compensate for the height difference of In bumps caused by different resist thicknesses between the cathode and anode regions. Consequently, well-shaped and dense In bumps with a maximum height of up to 4.4 mu m were fabricated on 8 mu m pitch Micro-LED chips. Afterwards, we bonded the Micro-LED chip with indium bumps to the CMOS chip, and we found that we could successfully control the CMOS chip to drive the Micro-LED chip to display specific characters through the Flexible Printed Circuit (FPC). This work is of significant importance for the fabrication of In bumps on Micro-LED chips with pitches below 10 mu m and subsequent bonding processes.
Keyword ：
bonding bonding height-to-size ratio height-to-size ratio Micro-LED Micro-LED the growth process of In bump the growth process of In bump
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| GB/T 7714 | Jiang, Bing-Xin , Chen, Hui , Zhang, Wen-Jing et al. Fabrication and bonding of In bumps on Micro-LED with 8 μm pixel pitch [J]. | ENGINEERING RESEARCH EXPRESS , 2024 , 6 (2) . |
| MLA | Jiang, Bing-Xin et al. "Fabrication and bonding of In bumps on Micro-LED with 8 μm pixel pitch" . | ENGINEERING RESEARCH EXPRESS 6 . 2 (2024) . |
| APA | Jiang, Bing-Xin , Chen, Hui , Zhang, Wen-Jing , Lan, Jin-Hua , Yang, Tian-Xi , Lin, Chang et al. Fabrication and bonding of In bumps on Micro-LED with 8 μm pixel pitch . | ENGINEERING RESEARCH EXPRESS , 2024 , 6 (2) . |
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The human brain possesses a remarkable ability to memorize information with the assistance of a specific external environment. Therefore, mimicking the human brain's environment-enhanced learning abilities in artificial electronic devices is essential but remains a considerable challenge. Here, a network of Ag nanowires with a moisture-enhanced learning ability, which can mimic long-term potentiation (LTP) synaptic plasticity at an ultralow operating voltage as low as 0.01 V, is presented. To realize a moisture-enhanced learning ability and to adjust the aggregations of Ag ions, we introduced a thin polyvinylpyrrolidone (PVP) coating layer with moisture-sensitive properties to the surfaces of the Ag nanowires of Ag ions. That Ag nanowire network was shown to exhibit, in response to the humidity of its operating environment, different learning speeds during the LTP process. In high-humidity environments, the synaptic plasticity was significantly strengthened with a higher learning speed compared with that in relatively low-humidity environments. Based on experimental and simulation results, we attribute this enhancement to the higher electric mobility of the Ag ions in the water-absorbed PVP layer. Finally, we demonstrated by simulation that the moisture-enhanced synaptic plasticity enabled the device to adjust connection weights and delivery modes based on various input patterns. The recognition rate of a handwritten data set reached 94.5% with fewer epochs in a high-humidity environment. This work shows the feasibility of building our electronic device to achieve artificial adaptive learning abilities.
Keyword ：
Ag nanofilament Ag nanofilament Ag nanowire network Ag nanowire network electricmobility electricmobility long-term potentiation long-term potentiation moisture-enhanced learning ability moisture-enhanced learning ability
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| GB/T 7714 | Qiu, Jiawen , Li, Junlong , Li, Wenhao et al. Silver Nanowire Networks with Moisture-Enhanced Learning Ability [J]. | ACS APPLIED MATERIALS & INTERFACES , 2024 , 16 (8) : 10361-10371 . |
| MLA | Qiu, Jiawen et al. "Silver Nanowire Networks with Moisture-Enhanced Learning Ability" . | ACS APPLIED MATERIALS & INTERFACES 16 . 8 (2024) : 10361-10371 . |
| APA | Qiu, Jiawen , Li, Junlong , Li, Wenhao , Wang, Kun , Xiao, Tianyu , Su, Hao et al. Silver Nanowire Networks with Moisture-Enhanced Learning Ability . | ACS APPLIED MATERIALS & INTERFACES , 2024 , 16 (8) , 10361-10371 . |
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Metalens, a metasurface with a focusing phase, has been the focus of research due to its immense potential for use in imaging and display technology. Traditional lens and optical imaging systems rely on phase accumulation, however metalens with subwavelength structures provide a disruptive path for miniaturized optical imaging systems by allowing unfettered modulation of incident light's phase and amplitude. Recently, extensive efforts have been devoted to exploring new design strategies, new functionalities, and possible applications. This paper reviews the development, principle, classification, and research status of metalens. In particular, this review focuses on the progress and challenges of improving imaging quality and expanding imaging diversity, including improvements of resolution, enhancement of depth of field, extension of field of view, and achromatism. Lastly, the prospects of metalens in the future display are summarized, and the application potentials of metalens in novel 3D display, intelligent and bionic display, as well as nano-pixelate light-emitting display (NLED) are emphasized. This paper in particular focuses on the progress and challenges of metalens in improving imaging quality and expanding imaging diversity, including improvements of resolution, enhancement of depth of field, extension of field of view, and achromatism. And the application potentials of metalens in future display, including novel 3D display, intelligent and bionic display, nano-pixelate light-emitting display, are emphasized.image
Keyword ：
achromatism achromatism depth of field depth of field field of view field of view imaging diversity imaging diversity metalens metalens resolution resolution
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| GB/T 7714 | Peng, Yuyan , Zhang, Jiawei , Zhou, Xiongtu et al. Metalens in Improving Imaging Quality: Advancements, Challenges, and Prospects for Future Display [J]. | LASER & PHOTONICS REVIEWS , 2024 , 18 (4) . |
| MLA | Peng, Yuyan et al. "Metalens in Improving Imaging Quality: Advancements, Challenges, and Prospects for Future Display" . | LASER & PHOTONICS REVIEWS 18 . 4 (2024) . |
| APA | Peng, Yuyan , Zhang, Jiawei , Zhou, Xiongtu , Chen, Chunliang , Guo, Tailiang , Yan, Qun et al. Metalens in Improving Imaging Quality: Advancements, Challenges, and Prospects for Future Display . | LASER & PHOTONICS REVIEWS , 2024 , 18 (4) . |
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