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Short-Term Synaptic Plasticity Mimicked on Ionic/Electronic Hybrid Oxide Synaptic Transistor Gated by Nanogranular SiO_2 Films

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Journal of Materials Science & Technology 2014年第11期30卷 1141-1144页

作者： Zhaojun Guo Liqiang Guo Liqiang zhu yuejin zhu Faculty of Science Ningbo University Ningbo Institute of Materials Technology & Engineering Chinese Academy of Sciences

An indium-zinc-oxide （IZO） based ionic/electronic hybrid synaptic transistor gated by field-configurable nanogranular SiO2 films was reported. The devices exhibited a high current ON/OFF ratio of above 107, a high electron mobility of ～14 cm2 V^-1 s^-1 and a low subthreshold swing of ～80 mV/decade. The gate bias would modulate the interplay between protons and electrons at the channel/dielectric interface. Due to the dynamic modulation of the transient protons flux within the nanogranular SiO2 films, the channel current would be modified dynamically. Short-term synaptic plasticities, such as short-term potentiation and short- term depression, were mimicked on the proposed IZO synaptic transistor. The results indicate that the synaptic transistor proposed here has potential applications in future neuromorphic devices.

关键词： Synaptic transistor Short-term synaptic plasticity Protonic/electronic hybrid

Selective sulfur conversion with surface engineering of electrocatalysts in a lithium-sulfur battery

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Carbon Energy 2023年第2期5卷 72-84页

作者： yuejin zhu Yinze Zuo Xuechao Jiao Revanasiddappa Manjunatha Ejikeme Raphael Ezeigwe Wei Yan Jiujun Zhang Institute for Sustainable Energy College of SciencesShanghai UniversityShanghaiPR China College of Materials Science and Engineering Fuzhou UniversityFuzhouPR China

The sluggish kinetics of multiphase sulfur conversion with homogeneous and heterogeneous electrochemical processes,causing the“shuttle effect”of soluble polysulfide species(PSs),is the challenges in terms of lithium-sulfur batteries(LSBs).In this paper,a Mn_(3)O_(4-x) catalyst,which has much higher activity for heterogeneous reactions than for homogeneous reactions(namely,preferentialactivity catalysts),is designed by surface engineering with rational oxygen *** to the rational design of the electronic structure,the Mn_(3)O_(4-x) catalyst prefers to accelerate the conversion of Li2S4 into Li_(2)S_(2)/Li_(2)S and optimize Li_(2)S deposition,reducing the accumulation of PSs and thus suppressing the“shuttle effect.”Both density functional theory calculations and in situ X-ray diffraction measurements are used to probe the catalytic mechanism and identify the reaction intermediates of MnS and Li_(y)Mn_(z)O_(4-x) for fundamental *** cell with Mn_(3)O_(4-x) delivers an ultralow attenuation rate of 0.028% per cycle over 2000 cycles at 2.5 *** with sulfur loadings of 4.93 and 7.10mg cm^(-2) in a lean electrolyte(8.4μL mg s^(-1)),the cell still shows an initial areal capacity of 7.3mAh cm^(-2).This study may provide a new way to develop preferential-activity heterogeneous-reaction catalysts to suppress the“shuttle effect”of the soluble PSs generated during the redox process of LSBs.

关键词： electrochemical kinetics heterogeneous catalysis lithium-sulfur batteries Mn3O4-x-catalyzed separator surface engineering

Self-assembled interlayer aiming at the stability of NiOx based perovskite solar cells

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Journal of Energy Chemistry 2022年第6期31卷 211-220,I0006页

作者： Tonghui Guo Zhi Fang Zequn Zhang Zhiqiang Deng Rui Zhao Jing Zhang Minghui Shang Xiaohui Liu Ziyang Hu yuejin zhu Liyuan Han Department of Microelectronic Science and Engineering Ningbo UniversityNingbo 315211ZhejiangChina School of Materials Science and Engineering Ningbo University of TechnologyNingbo 315016ZhejiangChina State Key Laboratory of Metal Matrix Composites Shanghai Jiao Tong UniversityShanghai 200240China

Inorganic NiO_(x) based inverted structure perovskite solar cells (PSCs) is reported to be more stable than that with the organic hole transport *** this work,NiO_(x)/MAPbI_(3) interface chemical reaction induced instability of perovskite is unveiled:Ni^(3+) and I^(-) exhibit redox reactions and deprotonation of MA^(+) happens,which result in interface defects and perovskite lattice *** the defective interface accelerates the degradation of perovskite by defect pathways from the bottom interface to the perovskite surface contacting H_(2)O/O_(2).Self-assembled interlayer of NH_(2)^(-)end silane on NiO_(x)separates the reactive NiO_(x)and MAPbI_(3),tunes the interface energy states by–NH_(2) end *** a result,the PSC based on the silane treated NiO_(x)achieves enhanced PCE of 20.1%with decent stability under environmental and extreme conditions (high temperature,high humidity,light infiltration).Our work highlights the interface chemical problem induced PSC instability and a simple interface modification to achieve the stable PSCs.

关键词： Perovskite solar cells Interface chemical problem NiOx hole transport material Self assemble Stability

高斯噪声诱导二元混合物/粒子系统有序结构的形成

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计算物理 2009年第6期26卷 925-930页

作者：冯文强诸跃进辽宁科技大学理学院辽宁鞍山114044 宁波大学物理系浙江宁波315211

采用蒙特卡罗方法研究高斯噪声场对添加硬球粒子的二元混合物系统自组装的驱动作用.发现硬球粒子与组分之间的相互作用决定硬球粒子在畴中存在的区域.当硬球粒子与组分之间的相互作用较大,硬球粒子浓度n≤0.05时,对于足够强的高斯噪声场... 详细信息

采用蒙特卡罗方法研究高斯噪声场对添加硬球粒子的二元混合物系统自组装的驱动作用.发现硬球粒子与组分之间的相互作用决定硬球粒子在畴中存在的区域.当硬球粒子与组分之间的相互作用较大,硬球粒子浓度n≤0.05时,对于足够强的高斯噪声场,存在一个最佳噪声作用概率区域（p=0.005~0.02）,其间高斯噪声已完全消除硬球粒子的钉扎效应,使体系快速生长并形成取向性很好的条状畴结构.

关键词：高斯噪声场二元混合物有序结构

Functioned fullerene between the perovskite grains visualized by scanning probe microscopy

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Functioned fullerene between the perovskite grains visualize...

Device design and simulation of ETL-free all inorganic perovskite solar cells

第六届新型太阳能电池材料科学与技术学术研讨会

作者： Ziyang Hu Jing Zhang yuejin zhu Department of Microelectronic Science and Engineering Ningbo University

In perovskite solar cells(PSCs), hybrid perovskite:fullerene phases have been proposed to suppress macroscopic current hysteresis behavior by alleviating ion migration. However, the understanding of how fullerenes exactly alleviate the current hysteresis and what is the influence of fullerenes in such hybrid phases are still unclear from a microscopic viewpoint. Here, the intentional incorporation of fullerene into perovskite has been employed to examine how fullerene exactly reduces the macroscopic current hysteresis. The location and distribution of fullerenes in the hybrid phase were confirmedly visualized by conductive atomic force microscopy and Kelvin probe force microscopy measurements. Fullerenes located at grain boundaries function as the beneficial effect on choking the channels of ion migration and also as the electron traps that compromise the photocarrier extraction. Macroscopic current hysteresis originating from the influxes of all nanoscopic grain boundary current signals is avoided in PSCs based on the hybrid perovskite:fullerene phases. Our results not only provide the strong correlation between nanoscopic and macroscopic current hysteresis behaviors, but also clearly clarify the role of fullerene how to reduce the current hysteresis in hybrid phases and thus prototype devices.

关键词： Current hysteresis perovskite solar cells fullerene grain boundary nanoscopic current

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Optoelectronics Letters 2024年

作者： Kaixuan SHI Yike ZHOU Xiaohui LIU Jing ZHANG yuejin zhu Like HUANG Department of Microelectronic Science and Engineering， School of Physical Science and Technology， Ningbo University

Cesium lead iodide (CsPbI3) is widely employed as the absorber material for perovskite solar cells （PSC） with its excellent photothermal stability. In comparison to complicated traditional PSC， simplifying the device structure can increase its competitiveness. Here， an ETL-free CsPbI3PSC was modeled using the Solar Cell Capacitance Simulator （SCAPS） program. The simulation involves a series of parameters optimization， including the thickness， doping concentration， defect density and permittivity of the FTO electrode， the hole transport layer （HTL）， and the perovskite （PVK） layer. Additionally， the defect density at the FTO/PVK interface and the PVK/HTL interface were considered. The study revealed that the power conversion efficiency （PCE） of the device is significantly affected by variations in the parameters of the perovskite layer， especially the thickness and defect density. Moreover， the defect density at the contact interfaces also notably influences the device efficiency. After systematic computational optimization， the best device exhibited an open-circuit voltage (VOC) of 1.16 V， a short-circuit current (JSC) of 21.52 mA/cm2， a fill factor （FF） of 87.83%， and a PCE of 21.9%， which is close to the full-structured device reported in experiment， demonstrating the potential of all inorganic PSCs with simplified structures.

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金属中气体元素分析典型案例

冶金分析 2022年第1期42卷 1-9页

作者：朱跃进朱瑛才中国科学院金属研究所

金属中气体元素分析已经存在60余年,其检测方法不同于其他化学元素。论文列举5个典型案例(铝中氢、金属中氩、金属中氦、稀土钢中氢、(铝)镁中氧),以进行技术交流和讨论。铝中氢作为金属中气体分析之最难当之无愧,有研究尝试简化铝中氢... 详细信息

金属中气体元素分析已经存在60余年,其检测方法不同于其他化学元素。论文列举5个典型案例(铝中氢、金属中氩、金属中氦、稀土钢中氢、(铝)镁中氧),以进行技术交流和讨论。铝中氢作为金属中气体分析之最难当之无愧,有研究尝试简化铝中氢分析方法,期望像钢样那样快速准确地得到结果,比如应用现有通用的脉冲熔融法反复试验上百次,未能成功,改用高频(或管式炉)热抽取法后,才做到测试铝中氢与钢中氢同样简单。借助于脉冲质谱法定氩(联测)仪建立了金属中氩可靠的分析方法,该方法已应用10余年。金属中氦的测定通过自行研制快速接口附件,在现用的定氢仪上完成。稀土钢中氢分析出现"零峰值"现象,国内3家资深单位3台仪器上全都不出氢峰。理论上分析是稀土影响,通过对比熔融法和抽取法,提供稀土干扰钢中氢分析的证据,应用热抽取法样品不熔可将稀土污染的干扰降至最低,得到稀土钢中氢峰。镁的化学活性强,脉冲熔融法测定镁中氧的过程中挥发污染干扰极其严重,尝试过用此类仪器分析镁中氧含量,最终达到国内出关数据与国外入关数据一致,此后专机专用并执行专属技术方案,解决了镁中氧检测的难题。

关键词：铝中氢金属中氩金属中氦稀土钢中氢镁中氧脉冲熔融法高频热抽取法

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基于自洽场理论两亲高分子自组装的研究

计算物理 2009年第6期26卷 917-924页

作者：尹海峰诸跃进曾春花凯里学院理学院贵州凯里556000 宁波大学物理系浙江宁波315211

运用扩展的自洽场和密度泛函理论(SCF/DFT),研究ABC蝌蚪形两亲高分子在稀溶剂中的自组装形态,其中蝌蚪形两亲高分子由线形嵌段共聚物链AB嫁接到球形纳米颗粒C上构成.与以往研究的线形ABC两亲高分子相比,蝌蚪形两亲高分子的自组装形态有... 详细信息

运用扩展的自洽场和密度泛函理论(SCF/DFT),研究ABC蝌蚪形两亲高分子在稀溶剂中的自组装形态,其中蝌蚪形两亲高分子由线形嵌段共聚物链AB嫁接到球形纳米颗粒C上构成.与以往研究的线形ABC两亲高分子相比,蝌蚪形两亲高分子的自组装形态有着很大的不同.在粒子亲溶剂,嵌段共聚物疏溶剂时,各组分间弱分凝条件下,蝌蚪形两亲高分子自组装成胶球状形貌;在强分凝条件下,随着嵌段共聚物疏溶剂性的增强,两亲高分子的自组织态由胶球状转变成四角、三角状形貌,其中嵌段B主要分布在各角上.通过改变各组分间的相互作用,在嵌段A亲溶剂,嵌段B和粒子疏溶剂时,粒子呈平行棒状或小方块状分布在胶球中.

关键词：软物质形态结构自组装

变密度随机涡模型在湍流射流扩散火焰中的应用

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计算物理 2011年第1期28卷 27-34页

作者：朱跃进董刚刘怡昕范宝春南京理工大学瞬态物理重点实验室江苏南京210094

采用变密度随机涡模型,对H2/O2/N2湍流射流扩散火焰进行数值模拟,湍流过程通过涡的采样、涡的抑制和涡的翻转实现.其中,针对变密度反应流问题,提出一种大涡抑制的新机制,并详细讨论各种参数对模型预测效果的影响.计算结果表明,修改后的... 详细信息

采用变密度随机涡模型,对H2/O2/N2湍流射流扩散火焰进行数值模拟,湍流过程通过涡的采样、涡的抑制和涡的翻转实现.其中,针对变密度反应流问题,提出一种大涡抑制的新机制,并详细讨论各种参数对模型预测效果的影响.计算结果表明,修改后的模型可以合理预测H2/O2/N2射流火焰结构,能够反映湍流的涡特性;模型中与涡采样和涡抑制有关的参数对预测结果有一定影响.

关键词：变密度随机涡模型大涡抑制化学反应数值模拟