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Enhanced Charge Transport in Organic Thin-Film Transistors Through Environmentally Benign MXene-P3HT Nanocomposites 利用环境友好型MXene-P3HT纳米复合材料增强有机薄膜晶体管中的电荷输运
IF 3.2 2区 工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2025-07-28 DOI: 10.1109/TED.2025.3589200
Radhe Shyam;Harshita Rai;Subhajit Jana;Shubham Sharma;Takaaki Manaka;Shyam S. Pandey;Rajiv Prakash
In this work, we report the synthesis of MXene (Ti2CTX) nanobelts from its MAX (Ti2AlC) phase via hydrothermal treatment with 5 M NaOH. This is an environmentally friendly and safer alternative to traditional HF-based etching processes. This approach reduces risks to health and handling concerning HF but maintains the exfoliation quality of the MXene layers. The Ti2CTX nanobelts were then incorporated at various concentrations into poly(3-hexylthiophene) (P3HT) matrices to form nanocomposite films using the unidirectional floating film transfer method (UFTM). These aligned hybrid films showed dramatically improved charge transport properties compared to pristine P3HT. For instance, adding 3% (v/v) MXene increased the charge carrier mobility from 0.05 cm2V ${}^{-{1}}$ s ${}^{-{1}}$ (pristine P3HT) to 0.57 cm2V ${}^{-{1}}$ s ${}^{-{1}}$ with a high on/off current ratio of $10^{{5}}$ . We attribute this improvement to the template effect of the MXene nanobelts, which promotes the orientational alignment of P3HT chains, thus facilitating efficient charge transport pathways.
本文报道了以MAX (Ti2AlC)相为原料,用5 M NaOH水热法制备MXene (Ti2CTX)纳米带。这是一种环保和安全的替代传统的基于hf的蚀刻工艺。这种方法降低了对健康和处理HF的风险,但保持了MXene层的去角质质量。然后将不同浓度的Ti2CTX纳米带掺入聚(3-己基噻吩)(P3HT)基质中,采用单向浮膜转移法(UFTM)形成纳米复合薄膜。与原始P3HT相比,这些排列的杂化膜显示出显著改善的电荷输运特性。例如,加入3% (v/v)的MXene可将载流子迁移率从0.05 cm2V ${}^{-{1}}$ s ${}^{-{1}}$(原始P3HT)提高到0.57 cm2V ${}^{-{1}}$ s ${}^{-{1}}$,且通断电流比高达$10^{{5}}$。我们将这种改进归因于MXene纳米带的模板效应,它促进了P3HT链的取向排列,从而促进了有效的电荷传输途径。
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引用次数: 0
An Analytical Model of RRAM Relaxation Effect and Its Application for Neural Network Weight Refresh Strategy in Large-Scale RRAM Array RRAM松弛效应分析模型及其在大规模RRAM阵列神经网络权值刷新策略中的应用
IF 3.2 2区 工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2025-07-28 DOI: 10.1109/TED.2025.3591090
Xingyu Zhai;Yu Kang;Liang Tian;Ao Du;Chenyi Wang;Yi Wang;Yinshui Xia;Yuda Zhao;Wenchao Chen
In this article, an analytical model for the retention behaviors of analog resistive random access memory (RRAM) is proposed. The model accounts for the diffusion of oxygen vacancies ( ${V}_{O}$ ), the recombination of ${V}_{O}$ , and the impact of programming pulsewidth on the number of metastable oxygen vacancies. It enables the analysis of the conductivity drift characteristics of RRAM under various resistance states, temperatures, and programming pulse widths. The model is in good agreement with our experimental results of analog RRAM arrays with high/low ${V}_{O}$ diffusion coefficients, confirming the accuracy and practicability of the model. Additionally, the model is integrated into a fully connected RRAM-based neural network to evaluate the reliability of the network. Furthermore, this article introduces a novel weight refresh strategy based on the accurate retention time (ART), defined as the period during which neural network accuracy degrades slowly, to balance the trade-off between neural network performance and power consumption. The prediction scheme of ART employs a two-stage machine learning framework. The predicted results on the neural network demonstrate that the strategy maintains high accuracy ( $le 2$ % degradation) while minimizing refresh frequency. This work bridges physical mechanisms with neural network optimization, offering a scalable, low-power consumption solution for computation-in-memory (CIM) systems.
本文提出了模拟电阻随机存取存储器(RRAM)的保留行为分析模型。该模型考虑了氧空位(${V}_{O}$)的扩散、${V}_{O}$的重组以及编程脉冲宽度对亚稳氧空位数量的影响。它能够分析RRAM在各种电阻状态、温度和编程脉冲宽度下的电导率漂移特性。该模型与高/低${V}_{O}$扩散系数的模拟RRAM阵列的实验结果吻合较好,证实了该模型的准确性和实用性。此外,将该模型集成到基于全连接rram的神经网络中,以评估网络的可靠性。此外,本文还引入了一种新的基于精确保持时间(ART)的权重刷新策略,ART定义为神经网络精度缓慢下降的时间段,以平衡神经网络性能和功耗之间的权衡。ART的预测方案采用两阶段机器学习框架。在神经网络上的预测结果表明,该策略在最小化刷新频率的同时保持了较高的准确率(降低了2%)。这项工作将物理机制与神经网络优化连接起来,为内存计算(CIM)系统提供了可扩展的低功耗解决方案。
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引用次数: 0
High-Gain CMOS-Like Inverters Based on F-Plasma-Treated Ambipolar SnO Thin-Film Transistors 基于f等离子体处理的双极性SnO薄膜晶体管的高增益类cmos逆变器
IF 3.2 2区 工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2025-07-28 DOI: 10.1109/TED.2025.3590361
Zening Gao;Peng Dai;Ning Wang;Yiwen Yao;Jialong Song;Jinlong Xiang;Yiming Wang;Jiawei Zhang;Yuxiang Li;Qian Xin;Aimin Song
Although CMOS-like inverters based on ambipolar thin-film transistors (TFTs) have garnered significant interest due to their simplified fabrication and high integration density, achieving high-performance ambipolar TFTs remains challenging. In this work, we systematically investigate the effects of different annealing and passivation schemes—including annealing without passivation (AWP), annealing before passivation (ABP), and annealing after passivation (AAP)—using SiO2, Al2O3, and HfO2 passivation layers (PVLs) on the performance of SnO TFTs. Among them, the AAP-Al2O3 device exhibits the most balanced p-type and n-type conduction and superior negative bias stress (NBS) stability. Furthermore, the ambipolar characteristics, including the on/off current ratio, subthreshold swing (SS), and bias stress stability, were significantly enhanced by fluorine (F) plasma treatment on the SnO channel. Finally, a CMOS-like inverter composed of two identical F-plasma-treated ambipolar SnO TFTs achieved an exceptionally high voltage gain of 289 at a low supply voltage of 8 V. This work offers a simple and effective strategy for developing thin-film CMOS-like circuits suitable for the next-generation cost-effective electronics.
尽管基于双极薄膜晶体管(TFTs)的类cmos逆变器由于其简化的制造和高集成密度而引起了人们的极大兴趣,但实现高性能的双极薄膜晶体管仍然具有挑战性。在这项工作中,我们系统地研究了不同的退火和钝化方案-包括无钝化退火(AWP),钝化前退火(ABP)和钝化后退火(AAP) -使用SiO2, Al2O3和HfO2钝化层(pvl)对SnO tft性能的影响。其中,AAP-Al2O3器件表现出最平衡的p型和n型导通,以及优异的负偏压(NBS)稳定性。此外,氟(F)等离子体处理显著增强了SnO通道的双极性特性,包括开/关电流比、亚阈值摆幅(SS)和偏置应力稳定性。最后,由两个相同的f等离子体处理的双极性SnO tft组成的类似cmos的逆变器在8 V的低电源电压下获得了289的异常高电压增益。这项工作为开发适用于下一代低成本电子产品的薄膜类cmos电路提供了一种简单有效的策略。
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引用次数: 0
Radio Frequency Amplification in a Linear Crossed-Field Amplifier Using Cold Cathodes 使用冷阴极的线性交叉场放大器中的射频放大
IF 3.2 2区 工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2025-07-28 DOI: 10.1109/TED.2025.3591758
Ranajoy Bhattacharya;Cesar Segura Del Rio;Winston Chern;Jake West;Isaac Wolstenholme;Mason Cannon;Gerardo Herrera;Marcus Pearlman;Akintunde Ibitayo Akinwande;Allen L. Garner;Jim Browning
A low-frequency (561 MHz), injected beam, and linear format crossed-field amplifier (CFA) using gated field emission arrays (GFEAs) has been experimentally studied and compared with simulation. The CFA uses a copper wire on Teflon meander line circuit with retardation of ~21. Eight silicon tip GFEA dies were used as the injected electron source to provide up to 160 mA. A segmented end-collector system (nine electrodes) was used to measure the spatial variation of the beam current with and without gain. A gain of ~5.5 dB was measured for a sole-circuit voltage of −2.9 kV, an injected beam current of ~160 mA, an applied magnetic field of 0.0125 T, a radio frequency (RF) input power of 15 W, and a sole-circuit gap of 2 cm. A CST particle in-cell model shows a high gain (~1–2 dB) than the experiment, but the gain variation versus injected current, voltage, and magnetic field matches well. Variation with RF input power shows a significant decrease in gain above 15 W in the experiment with the decrease seen in simulation observed after 25 W. Analysis of the end-collector current shows a rapid decrease after 12 W in the experiment and 25 W in the simulation. This result occurs because the highly cycloidal electrons are close to the CFA circuit and get collected on the circuit before providing amplification energy. This observation is confirmed in simulation, which shows that the current going to the circuit rapidly increases and the end-collector current rapidly decreases. This effect also accounts for the higher gain observed in simulation. These experiments provide a basis for using gated field emitters to study beam–wave interactions in microwave vacuum electron devices.
实验研究了一种低频(561 MHz)注入波束线性格式的门控场发射阵列交叉场放大器(CFA),并与仿真进行了比较。CFA在特氟龙曲线电路上使用铜线,迟滞率为~21。采用8个硅尖GFEA模具作为注入电子源,提供高达160 mA的电流。采用分节式末端集电极系统(9个电极)测量了有增益和无增益时束流电流的空间变化。在- 2.9 kV的空穴电压、~160 mA的注入电流、0.0125 T的外加磁场、15w的射频输入功率和2cm的空穴间隙条件下,获得了~5.5 dB的增益。CST粒子胞内模型的增益比实验高(~1 ~ 2 dB),但增益随注入电流、电压和磁场的变化规律吻合良好。在实验中,随着射频输入功率的变化,增益在15w以上显着下降,在25w之后的模拟中观察到的下降。对端集电极电流的分析表明,实验值为12w,仿真值为25w后,端集电极电流迅速减小。这是因为高度摆线电子靠近CFA电路,在提供放大能量之前被收集在电路上。这一观察结果在仿真中得到了证实,表明进入电路的电流迅速增大,而端集电极电流迅速减小。这种效应也解释了在模拟中观察到的更高增益。这些实验为利用门控场发射器研究微波真空电子器件中的波束相互作用提供了基础。
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引用次数: 0
Ultrawide Band Gap Semiconductor Devices for RF, Power and Optoelectronic Applications 用于射频、功率和光电子应用的超宽带隙半导体器件
IF 2.9 2区 工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2025-07-25 DOI: 10.1109/TED.2025.3585331
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引用次数: 0
Call for Papers for a Special Issue of IEEE Transactions on Electron Devices on Wide Band Gap Semiconductors for Automotive Applications 《汽车用宽带隙半导体电子器件》特刊征文
IF 2.9 2区 工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2025-07-25 DOI: 10.1109/TED.2025.3585327
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引用次数: 0
IEEE Transactions on Electron Devices Information for Authors IEEE电子器件信息汇刊
IF 2.9 2区 工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2025-07-25 DOI: 10.1109/TED.2025.3585333
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引用次数: 0
Impact of Channel Material, Interface Quality, and Polarization on Memory Window of Interfacial Layer-Free FeFET With Oxide Semiconductor 沟道材料、界面质量和极化对氧化物半导体无界面层ffet记忆窗的影响
IF 3.2 2区 工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2025-07-25 DOI: 10.1109/TED.2025.3589546
Zikang Yao;Danyang Chen;Tianning Cui;Yulong Dong;Zhiyu Lin;Jingquan Liu;Mengwei Si;Xiuyan Li
This study systematically investigates the modulation of the memory window (MW) in interfacial layer (IL)-free and Hfx $Zr_{{1}-{x}}$ O2 (HZO)-based ferroelectric field-effect transistors (FeFETs) with oxide channel by engineering oxide semiconductor materials, annealing processes, and polarization in HZO. Our findings reveal that the MW in such an FeFET is predominantly governed by the positive charge supply capability of the semiconductor layer and the interface properties between the ferroelectric (FE) layer and the semiconductor. Specifically, higher doping concentrations in the channel material and less interface trapping are shown to enhance the MW. In contrast, polarization shows limited effect. These results provide critical insights into the underlying mechanisms of MW optimization in FeFETs with oxide semiconductor channels.
本研究系统地研究了利用工程氧化物半导体材料、退火工艺和HZO中的极化对无界面层(IL)和Hfx $Zr_{{1}-{x}}$ O2 (HZO)基铁电场效应晶体管(fefet)中具有氧化物沟道的记忆窗口(MW)的调制。我们的研究结果表明,这种FeFET中的MW主要由半导体层的正电荷供应能力和铁电层与半导体之间的界面特性决定。具体地说,通道材料中较高的掺杂浓度和较少的界面捕获可以提高毫瓦。相反,极化效果有限。这些结果为具有氧化物半导体通道的效应场效应管中MW优化的潜在机制提供了重要的见解。
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引用次数: 0
IEEE Transactions on Electron Devices Publication Information IEEE电子设备出版信息汇刊
IF 2.9 2区 工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2025-07-25 DOI: 10.1109/TED.2025.3585325
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引用次数: 0
Reliability of Advanced Nodes 高级节点可靠性
IF 2.9 2区 工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC Pub Date : 2025-07-25 DOI: 10.1109/TED.2025.3585329
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引用次数: 0
期刊
IEEE Transactions on Electron Devices
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