Maria Vitoria Guimaraes Leal;Ahmad Azizimanesh;Nazmul Hasan;Stephen M. Wu
{"title":"Performance and Scalability of Strain Engineered 2D MoTe2 Phase-Change Memristors","authors":"Maria Vitoria Guimaraes Leal;Ahmad Azizimanesh;Nazmul Hasan;Stephen M. Wu","doi":"10.1109/JEDS.2025.3556316","DOIUrl":"https://doi.org/10.1109/JEDS.2025.3556316","url":null,"abstract":"This work presents a performance optimization and scalability study of a two-dimensional vertical molybdenum ditelluride (MoTe2) phase-change memristor. The device switches between the semimetallic (1T’) and semiconducting (2H) states under an electric field. Process-induced strain engineering techniques at the contacts reduces the switching energy barrier, biasing the active region closer to the phase switching point. This work focuses on optimizing this technique to achieve the best yield and device performance, with a low switching voltage (<inline-formula> <tex-math>$leq 0.5$ </tex-math></inline-formula>V) and high on/off ratio <inline-formula> <tex-math>$geq 10{^{{5}}}$ </tex-math></inline-formula>. Small length and area of the contact between the metal stressor and the 2D 1T’-MoTe2 flake are critical for high yield and performance, potentially due to lowered chances of encountering defects introduced during the fabrication process (L<inline-formula> <tex-math>$leq 0.6mu $ </tex-math></inline-formula>m and A<inline-formula> <tex-math>$leq 0.3mu $ </tex-math></inline-formula>m2). Smaller flake contact perimeters <inline-formula> <tex-math>$leq 1.2mu $ </tex-math></inline-formula>m also reduce defect incidence, and increases on/off ratios. The switching voltage is influenced by the contact-flake geometry, exhibiting a lower value for 2D flake geometries with contact angles <inline-formula> <tex-math>$leq 65{^{text {o}}}$ </tex-math></inline-formula> likely due to geometric variation in strain distribution effects from process-induced strain engineering. These results demonstrate that by accounting for device geometry, our process may achieve yield approaching 90% with consistent low switching voltage and high on/off ratio. Yield and performance properties become better when scaled down in size due to our phase-change mechanism, which is the opposite behavior to most conductive filament based memristors.","PeriodicalId":13210,"journal":{"name":"IEEE Journal of the Electron Devices Society","volume":"13 ","pages":"343-349"},"PeriodicalIF":2.0,"publicationDate":"2025-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10945750","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143824659","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Electrical Characteristics of ML and BL MoS2 GAA NS FETs With Source/Drain Metal Contacts","authors":"Yueh-Ju Chan;Min-Hui Chuang;Yiming Li","doi":"10.1109/JEDS.2025.3575015","DOIUrl":"https://doi.org/10.1109/JEDS.2025.3575015","url":null,"abstract":"This paper reports source/drain (S/D) contact issues in monolayer and bilayer (BL) <inline-formula> <tex-math>$mathrm {MoS_{2}}$ </tex-math></inline-formula> devices through density-functional-theory (DFT) calculation and device simulation. We begin by analyzing material properties and van der Waals gaps at metal contacts of <inline-formula> <tex-math>$mathrm {MoS_{2}}$ </tex-math></inline-formula> using DFT calculation. These results are then used for device simulation, aligning closely with experimental data. For the first time, the model is extended to 3D gate-all-around (GAA) nanosheet (NS) field-effect transistors (FETs) simulation, enabling contact resistance <inline-formula> <tex-math>$(R_{C})$ </tex-math></inline-formula> estimation. This work addresses key challenges by reducing computational demands compared to non-equilibrium Green function method and accurately calibrating devices with various metal contacts and gate lengths. Simulations with C-type S/D contacts achieve an <inline-formula> <tex-math>$R_{C}$ </tex-math></inline-formula> of <inline-formula> <tex-math>$89.6~Omega $ </tex-math></inline-formula>-<inline-formula> <tex-math>$mu $ </tex-math></inline-formula>m in 7-channel GAA BL <inline-formula> <tex-math>$mathrm {MoS_{2}}$ </tex-math></inline-formula> NS FETs, offering an interesting study for 2D material-based devices.","PeriodicalId":13210,"journal":{"name":"IEEE Journal of the Electron Devices Society","volume":"13 ","pages":"485-493"},"PeriodicalIF":2.0,"publicationDate":"2025-03-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11017515","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144264230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Impact of Gamma Ray Irradiation on the Blocking Characteristics of Edge Termination on 4H-SiC and a Novel Anti-Ionizing Radiation Technology","authors":"Chuan-Han Chen;Bing-Yue Tsui;Der-Sheng Chao","doi":"10.1109/JEDS.2025.3574497","DOIUrl":"https://doi.org/10.1109/JEDS.2025.3574497","url":null,"abstract":"The impact of gamma ray irradiation on the blocking characteristics of edge termination on 4H-SiC has been investigated. The dominant mechanism for the degradation of breakdown voltage (VBD) is the trapping of net positive charges in the field oxide (FOX), while the increase in interface state density can be ignored. Through measurements of FOX MOSFETs and edge termination test structures, we found that edge termination with LOCal Oxidation of SiC (LOCOSiC) FOX exhibits lower variation in <inline-formula> <tex-math>$mathrm {V_{BD}}$ </tex-math></inline-formula> compared to conventional CVD FOX. Furthermore, it shows almost no susceptibility to gamma-ray irradiation up to 250 kGy. Therefore, it is recommended to utilize LOCOSiC FOX to mitigate the impact of irradiation on the blocking characteristics of SiC power devices’ edge termination.","PeriodicalId":13210,"journal":{"name":"IEEE Journal of the Electron Devices Society","volume":"13 ","pages":"472-476"},"PeriodicalIF":2.0,"publicationDate":"2025-03-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11016711","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144255702","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"AI-Assisted Design of Drain-Extended FinFET With Stepped Field Plate for Multi-Purpose Applications","authors":"Xiaoyun Huang;Hongyu Tang;Chenggang Xu;Yuxuan Zhu;Yan Pan;Dawei Gao;Yitao Ma;Kai Xu","doi":"10.1109/JEDS.2025.3555327","DOIUrl":"https://doi.org/10.1109/JEDS.2025.3555327","url":null,"abstract":"Fin Field-Effect-Transistor (FinFET) has become fundamental components in advanced integrated circuit, while the drain-extended FinFET (DE-FinFET) features a lightly doped drain extension region to improve the device’s breakdown voltage. However, both structural refinement and the optimal integration of various parameters remain limited in achieving comprehensive optimization of device performance. This study introduces a novel DE-FinFET featuring a stepped field plate to improve overall performance of device. Moreover, within an AI-assisted design framework, predictive modeling and multi-objective optimization of the device are accomplished using Kolmogorov–Arnold Networks (KAN) and the Nondominated Sorting Genetic Algorithm (NSGA-III). More importantly, the proposed framework enables efficient device design and performance evaluation, achieving an average prediction accuracy of 98.19% for electrical performance metrics while being over two million times faster than traditional Technology Computer-Aided-Design (TCAD) simulations. In addition, it effectively generates Pareto-optimal solutions, delivering an average improvement of 9.03% across key electrical performance metrics. The proposed novel device of DE-FinFET offers a new route toward tailoring electrical properties. Meanwhile, the methodology of AI-assisted design not only accelerates device design but also enables customizable solutions for multi-purpose applications.","PeriodicalId":13210,"journal":{"name":"IEEE Journal of the Electron Devices Society","volume":"13 ","pages":"326-333"},"PeriodicalIF":2.0,"publicationDate":"2025-03-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10943177","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143824657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Jiabao Ye;Bing Chen;Nuo Xu;Jiantao Zhou;Rongjun Mu;Chao Du;Wei D. Lu
{"title":"A Non-Linear Partial Differential Equation Solver Based on Analog Memristor Crossbar Arrays","authors":"Jiabao Ye;Bing Chen;Nuo Xu;Jiantao Zhou;Rongjun Mu;Chao Du;Wei D. Lu","doi":"10.1109/JEDS.2025.3573409","DOIUrl":"https://doi.org/10.1109/JEDS.2025.3573409","url":null,"abstract":"An analog memristor-crossbar-array-based non-linear partial differential equation (PDE) solver is developed and verified through circuit-level simulations using realistic memristor device data. Several methodologies are suggested for the matrix-vector multiplication (MVM) and weight update (WU) operations, which are the essenses of the highly parallelised PDE solver. An example of solving the Burgers’ equation is demonstrated. Results suggest that, in comparison with traditional computers, the proposed memristor PDE solver offers dramatic performance improvement and energy savings.","PeriodicalId":13210,"journal":{"name":"IEEE Journal of the Electron Devices Society","volume":"13 ","pages":"477-484"},"PeriodicalIF":2.0,"publicationDate":"2025-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11015549","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144264199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Editorial for the J-EDS Special Issue for ESSERC 2024","authors":"Anne S. Verhulst","doi":"10.1109/JEDS.2025.3547035","DOIUrl":"https://doi.org/10.1109/JEDS.2025.3547035","url":null,"abstract":"","PeriodicalId":13210,"journal":{"name":"IEEE Journal of the Electron Devices Society","volume":"13 ","pages":"189-189"},"PeriodicalIF":2.0,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10936519","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143667624","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Antonio Vettoliere;Fabio Chiarella;Vincenzo Izzo;Marcello Campajola;Paolo Scotto Di Vettimo;Patrizia Minutolo;Alberto Aloisio;Ettore Sarnelli
{"title":"Dynamic Response of Low-Voltage Thin Film Phototransistors Based on DNTT Organic Semiconductor","authors":"Antonio Vettoliere;Fabio Chiarella;Vincenzo Izzo;Marcello Campajola;Paolo Scotto Di Vettimo;Patrizia Minutolo;Alberto Aloisio;Ettore Sarnelli","doi":"10.1109/JEDS.2025.3553583","DOIUrl":"https://doi.org/10.1109/JEDS.2025.3553583","url":null,"abstract":"We analyzed the dynamic response to the light of organic field-effect transistors in bottom-gate/top-contact configuration. We fabricated Al/Al2O3/SAM/DNTT/Au phototransistors by evaporating thin film layers through shadow masks on flexible PEN (polyethylene naphthalate) substrates. The structure is composed of Al layer as the gate electrode, and Au used both for Source and Drain electrodes. DNTT (Dinaphtho[2,3-b:<inline-formula> <tex-math>$2^{prime }$ </tex-math></inline-formula>,<inline-formula> <tex-math>$3^{prime }$ </tex-math></inline-formula>-f]thieno[3,2-b]thiophene) is the active organic semiconductor layer and Al2O3 is the dielectric material, chosen for the high value of the dielectric constant. SAM (self-assembled monolayer) was used to improve adhesion and interface properties between Al2O3 and DNTT. The transistors, sensitive to blue light, were biased at low-voltage (Vgs and <inline-formula> <tex-math>$mathrm { V_{ds}}$ </tex-math></inline-formula> from 0 to 3.5 V). Devices showed low <inline-formula> <tex-math>$mathrm { I_{gs}}$ </tex-math></inline-formula> leakage currents, of the order of <inline-formula> <tex-math>$5x10^{-10}$ </tex-math></inline-formula> A, and a clear electro-optical response to the light. The maximum responsivity value was about 0.21 A/W in the static regime, while the lowest irradiance producing a measurable response in dynamic regime was <inline-formula> <tex-math>$13~mu $ </tex-math></inline-formula>W/cm2. Fast time components of the rise time of the light response for the analyzed phototransistors, of the order of few hundreds of ms, turned out to be among the fastest reported in literature for Al/AlOx/DNTT/Au organic phototransistor. These preliminary results are encouraging for developing organic phototransistors for visible light communication.","PeriodicalId":13210,"journal":{"name":"IEEE Journal of the Electron Devices Society","volume":"13 ","pages":"317-325"},"PeriodicalIF":2.0,"publicationDate":"2025-03-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10937183","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143777975","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
SangWoon Lee;JungSuk Oh;HyeongMin Kim;YiKyoung You;Nack-Hyeon Keum;HeeJu Moon;SangHun Kim;KeeChan Park;Hwarim Im
{"title":"A Low-Power LTPO Scan Driver Circuit Using DC Power Supplied Buffer","authors":"SangWoon Lee;JungSuk Oh;HyeongMin Kim;YiKyoung You;Nack-Hyeon Keum;HeeJu Moon;SangHun Kim;KeeChan Park;Hwarim Im","doi":"10.1109/JEDS.2025.3571171","DOIUrl":"https://doi.org/10.1109/JEDS.2025.3571171","url":null,"abstract":"This paper proposes a novel low-temperature polycrystalline silicon and oxide (LTPO) scan driver circuit integrating p-channel low-temperature polycrystalline silicon (LTPS) thin-film transistors (TFTs) and n-channel metal-oxide (MOx) TFTs. The proposed circuit employs a complementary metal-oxide-semiconductor inverter as an output buffer, allowing low-level voltage to be delivered from a DC power supply to the output node without relying on clock-supplied bootstrapping, which is typically required in most scan driver circuits to drive the output buffer. This design significantly lowers dynamic power consumption by up to 74% by reducing the power consumption due to charging/discharging the parasitic capacitance of the buffer TFT by the clock signals compared with the conventional LTPO scan driver circuits utilizing the clock-supplied bootstrapping method. Additionally, the proposed circuit reduces the positive bias applied to MOx TFTs to alleviate stress conditions effectively. Therefore, the proposed circuit can improve long-term reliability by mitigating the threshold voltage shifts of MOx TFTs.","PeriodicalId":13210,"journal":{"name":"IEEE Journal of the Electron Devices Society","volume":"13 ","pages":"494-500"},"PeriodicalIF":2.0,"publicationDate":"2025-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=11006837","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144331774","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Woo Jin Baek;Joon Pyo Kim;Song Hyeon Kuk;Juhyuk Park;Hyun Soo Kim;Dae-Myeong Geum;Sang Hyeon Kim
{"title":"Field-Effect Passivation of GaN-Based Blue Micro-Light-Emitting Diodes","authors":"Woo Jin Baek;Joon Pyo Kim;Song Hyeon Kuk;Juhyuk Park;Hyun Soo Kim;Dae-Myeong Geum;Sang Hyeon Kim","doi":"10.1109/JEDS.2025.3552171","DOIUrl":"https://doi.org/10.1109/JEDS.2025.3552171","url":null,"abstract":"We demonstrate field-effect passivation (FEP) of GaN-based blue <inline-formula> <tex-math>$mu $ </tex-math></inline-formula> LEDs by incorporating an additional metal-oxide-semiconductor gate structure on the sidewalls. This approach allows for active control of surface band bending at the sidewalls, thereby modulating carrier trapping and de-trapping. We observe that applying a negative gate voltage <inline-formula> <tex-math>$(V_{G})$ </tex-math></inline-formula> facilitates electron de-trapping, leading to a reduction in surface recombination and a corresponding decrease in current, as evidenced by an enhanced external quantum efficiency (EQE). Conversely, applying a positive <inline-formula> <tex-math>$V_{G}$ </tex-math></inline-formula> results in the opposite effect.","PeriodicalId":13210,"journal":{"name":"IEEE Journal of the Electron Devices Society","volume":"13 ","pages":"303-307"},"PeriodicalIF":2.0,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10930472","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143740268","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Design and Optimization of Bilayer InGaSnO and Nitrogen-Doped InSnO Thin-Film Transistors for Enhanced Mobility and Reliability","authors":"Weijie Jiang;Li Lu;Chenfei Li;Wenyang Zhang;Wenzhao Wang;Guoli Li;Jingli Wang;Xingqiang Liu;Ablat Abliz;Da Wan","doi":"10.1109/JEDS.2025.3552454","DOIUrl":"https://doi.org/10.1109/JEDS.2025.3552454","url":null,"abstract":"In this study, high-performance indium gallium tin oxide (IGTO) and nitrogen (N) doped indium tin oxide (ITO) hetero structured bilayer thin-film transistors (TFTs) are prepared by incorporating an N-doped ITO intercalation layer in single-layer IGTO TFTs. The performance of the IGTO/ITO:N bilayer TFTs is significantly improved compared with single-layer IGTO TFTs, with specific indicators including a field-effect mobility of 32.6 cm2/V<inline-formula> <tex-math>$cdot $ </tex-math></inline-formula>s, a subthreshold swing of 201 mV/dec, a threshold voltage shifts of 0.21 V and −0.45 V under ±10 V gate-bias stress. The results show that the performance enhancement is due to the rational design of the bilayer structure, in which the ITO layer functions as a charge-accumulation layer, providing additional electrons. Meanwhile, N doping effectively reduces the oxygen vacancies, thereby decreasing the interfacial trap density, and ultimately enhancing the performance of single-layer IGTO TFTs. Through X-ray photoelectron spectroscopy and low-frequency noise analyses, we further confirmed the positive effects of N doping and bilayer structure on reducing the defective states and enhancing the stability of TFTs. Overall, the strategy presented here is effective for preparing high performance oxide TFTs for potential applications in future optoelectronic displays.","PeriodicalId":13210,"journal":{"name":"IEEE Journal of the Electron Devices Society","volume":"13 ","pages":"290-296"},"PeriodicalIF":2.0,"publicationDate":"2025-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=10930954","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143726410","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}