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180 results on '"Cai, Houzhi"'

12. Thermally Activated Delayed Fluorescence Triplet State Excitons for High‐Performance Organic Photodetectors: A Novel Strategy.

Author

Iqbal, Muhammad Ahsan, Weng, Xiaoliang, Kang, Chenxu, Arif, Nayab, Wu, Kewen, Tang, Wei, Dai, Sichao, Fang, Xueqian, Cai, Houzhi, and Zeng, Yu‐Jia

Subjects
DELAYED fluorescence, PHOSPHORESCENCE, EXCITON theory, PHOTODETECTORS, LIGHT emitting diodes, QUANTUM efficiency
Abstract

Photoinduced charge‐trapping is a promising strategy for boosting the photosensitivity of organic photodetectors at the expense of their response time. In addition, they have a low carrier extraction yield due to the formation of low‐energy triplet excitons through the recombination of a photogenerated hole–electron pair. Materials with thermally activated delayed fluorescence (TADF) exhibit a long‐lived (≈µs) excited spin‐triplet nearly iso‐energetically aligned with that of an excited spin‐singlet, which results in suppressed exciton losses and is widely used in organic light‐emitting diodes. The extraction and population of triplet state excitons in TADFs is a sought‐after but underexplored aspect of photoinduced gating in photodetectors. A 1,2,3,5‐tetrakis(carbazol‐9‐yl)4,6‐Dicyanobenzene (4CzIPN) TADF blend with a high‐mobility Poly[2,5‐bis(3‐tetradecylthiophen‐2‐yl)thieno[3,2‐b]thiophene] (PBTTT‐C14) polymer via bulk type‐II offset can increase free carrier extraction yield (fast response) and retain trapped electrons in TADF triplet states (high gain). The PBTTT‐C14/4CzIPN ultraviolet photodetector device maintains a trade‐off between high photogain (≈103) and fast response time (79 ms) at 300 nm while operating at a shallow dark current (≈pA). Furthermore, the device shows high external quantum efficiency (≈104 %) and detectivity (≈1011 Jones) for low light power (

Published
2024
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13. 应用于激光聚变的X射线分幅成像技术

Author

Cai, Houzhi, primary, Deng, Xuan, additional, Luo, Qiuyan, additional, Du, Zhuoming, additional, Huang, Xiaoya, additional, Niu, Lihong, additional, Zhang, Jingjin, additional, Liu, Jinyuan, additional, and Xiang, Lijuan, additional

Published
2023
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14. Design and Simulation of a Compact Sub-Nanosecond Pulse Generator Based on Marx’s Circuit Theory of Field-Effect Transistors

Author

Fu, Wenyong, Duan, Xindong, Huang, Junkun, Zhang, Jingjin, Guo, Quanliang, and Cai, Houzhi

Abstract

High-voltage ultrafast pulses can be effectively used to control the gated traveling-wave amplitude division of microchannel plates. In view of that and according to the microstrip transmission theory, this study proposes a pulse generator based on the Marx circuit of a field-effect tube. In this study, detailed designs of the proposed pulse generator are presented and validated by simulations using the OrCAD PSpice. An experimental setup is constructed to demonstrate the viability of the proposed design. Finally, an optimized pulse with a 2.2-kV amplitude and a 220-ps width is generated. This article provides a reference for future design of advanced direct capacitor discharge pulse generator with adjustable pulse parameters using the silicon carbide field effect.

Published
2024
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26. 微通道板增益均匀性理论研究

Author

Deng Pokun, 邓珀昆, primary, Lin Kaixuan, 林楷宣, additional, Luo Qiuyan, 罗秋燕, additional, Long Jinghua, 龙井华, additional, Wang Dong, 王东, additional, Lei Yunfei, 雷云飞, additional, Huang Junkun, 黄峻堃, additional, Wang Yong, 王勇, additional, Cai Houzhi, 蔡厚智, additional, Liu Jinyuan, 刘进元, additional, and Niu Lihong, 牛丽红, additional

Published
2022
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28. 脉冲展宽X射线分幅相机空间分辨特性研究

Author

Luo Qiuyan, 罗秋燕, primary, Lin Kaixuan, 林楷宣, additional, Chen Jiajie, 陈嘉杰, additional, Wang Jiaheng, 王佳恒, additional, Huang Junkun, 黄峻堃, additional, Fu Wenyong, 付文勇, additional, Cai Houzhi, 蔡厚智, additional, and Liu Jinyuan, 刘进元, additional

Published
2022
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32. 双透镜脉冲展宽分幅相机成像特性研究

Author

雷云飞 Lei Yunfei, 刘进元 Liu Jinyuan, 蔡厚智 Cai Houzhi, 黄峻堃 Huang Junkun, 王勇 Wang Yong, and 邓珀昆 Deng Pokun

Subjects
Electrical and Electronic Engineering, Atomic and Molecular Physics, and Optics
Published
2022

33. 脉冲展宽X射线分幅相机空间分辨特性研究

Author

罗秋燕 Luo Qiuyan, 林楷宣 Lin Kaixuan, 陈嘉杰 Chen Jiajie, 王佳恒 Wang Jiaheng, 黄峻堃 Huang Junkun, 付文勇 Fu Wenyong, 蔡厚智 Cai Houzhi, and 刘进元 Liu Jinyuan

Subjects
Electrical and Electronic Engineering, Atomic and Molecular Physics, and Optics
Published
2022

34. 微通道板增益均匀性理论研究

Author

邓珀昆 Deng Pokun, 林楷宣 Lin Kaixuan, 罗秋燕 Luo Qiuyan, 龙井华 Long Jinghua, 王东 Wang Dong, 雷云飞 Lei Yunfei, 黄峻堃 Huang Junkun, 王勇 Wang Yong, 蔡厚智 Cai Houzhi, 刘进元 Liu Jinyuan, and 牛丽红 Niu Lihong

Subjects
Electrical and Electronic Engineering, Atomic and Molecular Physics, and Optics
Published
2022

35. High Quality TaS 2 Nanosheet SPR Biosensors Improved Sensitivity and the Experimental Demonstration for the Detection of Hg 2+.

Author

Jia, Yue, Liao, Yunlong, and Cai, Houzhi

Subjects
BIOSENSORS, TRANSITION metals, DETECTION limit
Abstract

TaS2 as transition metal dichalcogenide (TMD) two-dimensional (2D) material has sufficient unstructured bonds and large inter-layer spacing, which highly supports transporting and absorbing mercury ions. The structural characterizations and simulation data show that an SPR sensor with high sensitivity can be obtained with a TaS2 material-modified sensitive layer. In this paper, the role of TaS2 nanoparticles in an SPR sensor was explored by simulation and experiment, and the TaS2 layer in an SPR sensor was characterized by SEM, elemental mapping, XPS, and other methods. The application range of structured TaS2 nanoparticles is explored, these TaS2 based sensors were applied to detect Hg2+ ions at a detection limit approaching 1 pM, and an innovative idea for designing highly sensitive detection techniques is provided. [ABSTRACT FROM AUTHOR]

Published
2022
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37. 脉冲展宽分幅变像管场曲特性研究

Author

Lei Yunfei, 雷云飞, primary, Liu Jinyuan, 刘进元, additional, Cai Houzhi, 蔡厚智, additional, Huang Junkun, 黄峻堃, additional, Wang Yong, 王勇, additional, and Deng Pokun, 邓珀昆, additional

Published
2021
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43. Study on Pulse-Dilation X-Ray Diodes

Author

Fu Wenyong, 付文勇, primary, Cai Houzhi, 蔡厚智, additional, Wang Dong, 王东, additional, Lei Yunfei, 雷云飞, additional, Huang Junkun, 黄峻堃, additional, Wang Yong, 王勇, additional, Deng Pokun, 邓珀昆, additional, Long Jinghua, 龙井华, additional, and Liu Jinyuan, 刘进元, additional

Published
2020
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46. 脉冲展宽分幅变像管色差特性分析

Author

雷云飞 LEI Yunfei, 刘进元 LIU Jinyuan, 蔡厚智 CAI Houzhi, 黄峻堃 HUANG Junkun, 王勇 WANG Yong, and 邓珀昆 DENG Pokun

Subjects
Atomic and Molecular Physics, and Optics
Published
2021

47. 脉冲展宽分幅变像管场曲特性研究

Author

Liu Jinyuan, Huang Junkun, Wang Yong, Lei Yunfei, Deng Pokun, and Cai Houzhi

Subjects
Physics, Framing (visual arts), Dilation (metric space), Optics, business.industry, Tube (fluid conveyance), business, Atomic and Molecular Physics, and Optics, Petzval field curvature, Electronic, Optical and Magnetic Materials, Pulse (physics)
Published
2021

48. Study on Pulse-Dilation X-Ray Diodes

Author

邓珀昆 Deng Pokun, 王东 Wang Dong, 付文勇 Fu Wenyong, 王勇 Wang Yong, 龙井华 Long Jinghua, 刘进元 Liu Jinyuan, 黄峻堃 Huang Junkun, 雷云飞 Lei Yunfei, and 蔡厚智 Cai Houzhi

Subjects
Optics, Materials science, business.industry, X-ray, Dilation (morphology), business, Atomic and Molecular Physics, and Optics, Electronic, Optical and Magnetic Materials, Diode
Published
2020

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