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Nickel oxide for inverted structure perovskite solar cells

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Journal of Energy Chemistry 2021年第1期30卷 393-411,I0013页

作者： Fei Ma Yang Zhao Jinhua Li Xingwang Zhang haoshuang gu Jingbi You Faculty of Physics and Electronic Technology Hubei UniversityWuhan 430062HubeiChina Key Laboratory of Semiconductor Materials Science Institute of SemiconductorsChinese Academy of SciencesBeijing 100083China Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijing 100083China

The emergence of inverted perovskite solar cells(PSCs) has attached great attention derived from the potential in improving stability. Charge transporting layer, especially hole transporting layer is crucial for efficient inverted PSCs. Organic materials were used as hole transporting layer previously. Recently, more and more inorganic hole transporting materials have been deployed for further improving the device stability. Nickel oxide(NiOx) as p-type metal oxide, owning high charge mobility and intrinsic stability,has been widely adopted in inverted PSCs. High performance over 20% efficiency has been achieved on NiOx base inverted PSCs. Herein, we have summarized recent progresses and strategies on the NiOx based PSCs, including the synthesis or deposition methods of NiOx, doping and surface modification of NiOx for efficient and stable PSCs. Finally, we will discuss current challenges of utilizing NiOx HTLs in PSCs and attempt to give probable solutions to make further development in efficient as well as stable NiOx based PSCs.

关键词： Nickel oxide Perovskite solar cell Modification Doping

Structure and Piezoelectric Properties of Lead-Free Na_(0.5)Bi_(0.5)TiO_3 Nanofibers Synthesized by Electrospinning

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Journal of Materials Science & Technology 2015年第12期31卷 1181-1185页

作者： Di Zhou Youhua Zhou Yu Tian Yafang Tu guang Zheng haoshuang gu School of Physics & Information Engineering Jianghan University Hubei Collaborative Innovation Centre for Advanced Organic Chemical Materials Faculty of Physics and Electronic ScienceHubei University

Lead-free Na0.5Bi0.5TiO 3（NBT） nanofibers with the perovskite structure were prepared by the electrospinning *** nanofibers were about 200-300 nm in diameter and up to several hundred microns in *** crystal structures and morphologies of the nanofibers were characterized by X-ray diffraction（XRD）,Raman spectroscopy,scanning electron microscopy（SEM）,and transmission electron microscopy（TEM）.The effective piezoelectric property of individual NBT nanofiber was examined by piezoresponse force microscopy（PFM）.The NBT nanofibers crystallized in pure perovskite phase after annealing above 700℃in air and comprised a great number of fine particles with size of 60-80 *** addition,the electromechanical energy conversion models for NBT nanofibers were built and demonstrated high voltage output as high as several *** a result qualifies NBT nanofibers as a promising candidate for leadfree electromechanical conversion devices.

关键词： Sodium bismuth titanate Perovskite Nanofiber Electrospinning Piezoelectric

Voltage-induced penetration effect in liquid metals at room temperature

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National Science Review 2020年第2期7卷 366-372页

作者： Frank F Yun Zhenwei Yu Yahua He Lei Jiang Zhao Wang haoshuang gu Xiaolin Wang Institute for Superconducting and Electronic Materials Australian Institute for Innovative Materials University of Wollongong Laboratory of Bioinspired Smart Interfacial Science Technical Institute of Physics and Chemistry Chinese Academy of Sciences Hubei Key Laboratory of Ferro & Piezoelectric Materials and Devices Faculty of Physics and Electronic Sciences Hubei University ARC Centre of Excellence in Future Low-Energy Electronics Technologies University of Wollongong

Room-temperature liquid metal is discovered to be capable of penetrating through macro-and microporous materials by applying a voltage. The liquid metal penetration effects are demonstrated in various porous materials such as tissue paper, thick and fine sponges, fabrics, and meshes. The underlying mechanism is that the high surface tension of liquid metal can be significantly reduced to near-zero due to the voltage-induced oxidation of the liquid metal surface in a solution. It is the extremely low surface tension and gravity that cause the liquid metal to superwet the solid surface, leading to the penetration phenomena. These findings offer new opportunities for novel microfluidic applications and could promote further discovery of more exotic fluid states of liquid metals.

关键词： penetration effects liquid metals surface tension porous materials superwet

Modelling of the electronic and ferroelectric properties of trichloroacetamide using Monte Carlo and first-principles calculations

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Journal of Materiomics 2017年第2期3卷 130-134页

作者： Yaxuan Cai Shijun Luo Zhao Wang Juan Xiong haoshuang gu Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials Hubei Key Laboratory of Ferro&Piezoelectric Materials and DevicesFaculty of Physics&Electronic SciencesHubei UniversityWuhan 430062PR China School of Sciences Hubei Automotive Industries InstituteShiyan 442002PR China

The electronic structure and ferroelectric mechanism of trichloroacetamide were studied using first principles calculations and density functional theory within the generalized gradient *** both Bader charge and electron deformation density,large molecular spontaneous polarization is found to originate from the charge transfer cause by the strong“push-pull”effect of electron-releasing interacting with electron-withdrawing *** intermolecular hydrogen bonds,Ne-H…O,produce dipole moments in adjacent molecules to be aligned with each *** also reduce the potential energy of the molecular chain threaded by hydrogen *** to the symmetric crystalline properties,however,the polarization of trichloroacetamide is mostly compensated and therefore *** the Berry Phase method,the spontaneous polarization of trichloroacetamide was simulated,and good agreement with the experimental values was *** the polarization characteristics of trichloroacetamide,we constructed a one-dimensional ferroelectric Hamiltonian model to calculate the ferroelectric properties of *** the Hamiltonian model,the thermal properties and ferroelectricity of trichloroacetamide were studied using the Monte Carlo method,and the Tc value was calculated.

关键词： First-principles study Monte Carlo Trichloroacetamide TCAA Organic ferroelectrics

Investigation on the Synthesis Mechanism of β-FeSi_2 Prepared by Pulsed Laser Deposition

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Wuhan University Journal of Natural Sciences 2012年第1期17卷 61-66页

作者： ZHOU Youhua NIE Chu TIAN Huyong gu haoshuang School of Physics and Electronic Technology HubeiUniversity Wuhan 430062 Hubei China School of Physics and Information Engineering JianghanUniversity Wuhan 430056 Hubei China Department of Imaging and Applied Physics CurtinUniversity GPO Box U 1987 Perth 6845 WA Australia

The FeSi2 target alloy was fabricated by conventional powder metallurgy technology, and then, β-FeSi2 thin films was successfully prepared by pulsed laser deposition （PLD）. X-ray diffraction （XRD） and field emission scanning electron microscopy （FESEM） were used to characterize the structure, composition, and their changes in the process of β-FeSi2 preparation. In addition, a laser sintering process was also employed to prepare FeSi2 alloy. The analysis of radiation heat transfers in different-sized FeSi2 melt indicates that the cooling rate of the melt depends on the size, i.e., the cooling rate of the micron sized melt is 103 times greater than that of the millimeter-sized melt. The product a-FeSi2 by laser sintering and β-FeSi2 by PLD reveals the different phase transition process in crystallization of millimeter-sized and micron-sized （or submicron-sized） FeSi2 melt. The results of PLD preparation process shows that β-FeSi2 could be prepared through a liquid-phase sintering, followed by a rapid cooling.

关键词： β-FeSi2 powder metallurgy technology pulsed laser deoosition radiation heat transfers

Gas sensing capabilities of TiO_(2) porous nanoceramics prepared through premature sintering

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Journal of Advanced Ceramics 2015年第2期4卷 152-157页

作者： Yao XIONG Zilong TANG Yu WANG Yongming HU haoshuang gu Yuanzhi LI Helen Lai Wah CHAN Wanping CHEN Key Laboratory of Artificial Micro-and Nano-structures of Ministry of Education and School of Physics and Technology Wuhan UniversityWuhan 430072China School of Materials Science and Engineering State Key Laboratory of New Ceramics and Fine ProcessingTsinghua UniversityBeijing 100084China Department of Applied Physics and Materials Research Centre The Hong Kong Polytechnic UniversityHong KongChina Faculty of Physics and Electronic Technology Hubei UniversityWuhan 430062China State Key Laboratory of Silicate Materials for Architectures Wuhan University of TechnologyWuhan 430070China

Pure and noble metal(Pt,Pd,and Au)doped TiO_(2)nanoceramics have been prepared from TiO_(2)nanoparticles through traditional pressing and *** those samples sintered at 550℃,a typical premature sintering occurred,which led to the formation of a highly porous microstructure with a Brunauer-Emmett-Teller(BET)specific surface area of 23 m^(2)/*** room temperature,only Pt-doped samples showed obvious response to hydrogen,with sensitivities as high as~500 for 1000 ppm H_(2)in N_(2);at 300℃,all samples showed obvious responses to CO,while the responses of noble metal doped samples were much higher than that of the undoped *** mechanism for the observed sensing capabilities has been discussed,in which the catalytic effect of Pt for hydrogen is believed responsible for the room-temperature hydrogen sensing capabilities,and the absence of glass frit as commonly used in commercial thick-film metal oxide gas sensors is related to the high *** is proposed that much attention should be paid to metal oxide porous nanoceramics in developing gas sensors with high sensitivities and low working temperatures.

关键词： TiO_(2) porous nanoceramics premature sintering sensors hydrogen CO

SnO_(2)修饰MoS_(2)薄膜的n-p可调室温氢气响应及其原位SKPM研究

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Science China Materials 2023年第11期66卷 4427-4436页

作者：谈论刘贤朕杨飘云李炜杨伟佳李昂顾豪爽王钊 Hubei Engineering Research Center for Safety Detection and Control of Hydrogen Energy Hubei Key Laboratory of Micro-&Nano-electronic Materials and DevicesSchool of MicroelectronicsHubei UniversityWuhan 430062China College of Physics and Electromechanical Engineering Hubei University of EducationWuhan 430205China Institute of Microstructure and Properties of Advanced Materials Beijing University of TechnologyBeijing 100124China

研发高性能氢气传感器对氢能及相关产业发展具有重要意义.2D-MoS_(2)纳米材料在构建快速可靠的室温氢气传感器方面优势显著,但灵敏度和选择性较差.本文报导了具有n-p可调型氢敏响应行为的SnO_(2)修饰MoS_(2)薄膜,其原位SKPM研究表明SnO_... 详细信息

研发高性能氢气传感器对氢能及相关产业发展具有重要意义.2D-MoS_(2)纳米材料在构建快速可靠的室温氢气传感器方面优势显著,但灵敏度和选择性较差.本文报导了具有n-p可调型氢敏响应行为的SnO_(2)修饰MoS_(2)薄膜,其原位SKPM研究表明SnO_(2)(0.38 eV)和MoS_(2)(0.26 eV)在氢敏响应中会出现不同的表面电势变化,使其界面势垒随SnO_(2)覆盖率的增加而改变,从而使界面效应对体系n型氢敏响应的积极贡献转变为负面补偿.当SnO_(2)覆盖率为6.4%时,传感器具有增敏、提速且选择性好的n型氢敏响应,当其提高至95.6%时呈现p型响应.这种随结构n-p可调的氢敏响应既能用于传感层的敏感性能调节,还可为MoS_(2)基二维材料的气敏响应类型调控提供简单易行、成本低廉的方法.

关键词： hydrogen sensor 2D materials scanning Kelvin probe microscopy molybdenum disulfide tin dioxide

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交流脉冲式磁控溅射靶极电源的研制

仪器仪表学报 2006年第12期27卷 1651-1655页

作者：陈侃松顾豪爽湖北大学物理学与电子技术学院武汉430062

本文介绍了一种中频交流脉冲式磁控溅射靶极电源。该电源采用全桥逆变拓扑电路、PWM控制方式、输出功率叠加的方案,具有快速的过流检测与保护功能。在等离子体负载下进行了抑制弧光放电和空心阴极效应的实验,同低频直流脉冲电源相比,交... 详细信息

本文介绍了一种中频交流脉冲式磁控溅射靶极电源。该电源采用全桥逆变拓扑电路、PWM控制方式、输出功率叠加的方案,具有快速的过流检测与保护功能。在等离子体负载下进行了抑制弧光放电和空心阴极效应的实验,同低频直流脉冲电源相比,交流脉冲放电对其抑制是非常有效的。这表明该电源作为磁控溅射靶极电源是完全可行的,也为进一步探索交流磁控溅射新工艺提供了可靠的研究设备。

关键词：中频交流脉冲式靶极电源过流保护弧光放电空心阴极放电

基于图形化铌酸钾钠纳米棒阵列的自供电压力传感器

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Science China Materials 2023年第4期66卷 1494-1503页

作者：姜蕾卢梦瑞杨飘云范怡静黄浩熊娟王钊顾豪爽 John Wang Hubei Key Laboratory of Ferro-&Piezo-electric Materials and Devices Faculty of Physics and Electronic ScienceHubei UniversityWuhan 430062China Department of Materials Science and Engineering National University of SingaporeSingapore 117574Singapore College of Physics and Electromechanical Engineering Hubei University of EducationWuhan 430205China Key Laboratory of Wireless Sensor Network&Communication Shanghai Institute of Microsystem and Information TechnologyChinese Academy of SciencesShanghai 200050China

微/纳尺度压力传感器可以检测来自外部环境的压力,分析所施加力的位置,大小和方向.这种压力传感器在电子屏幕、电子皮肤、运动监测、人工触觉系统等多个领域都有很高的应用需求.本文组装了一种可实现二维映射,基于图案化铌酸钾钠纳米棒... 详细信息

微/纳尺度压力传感器可以检测来自外部环境的压力,分析所施加力的位置,大小和方向.这种压力传感器在电子屏幕、电子皮肤、运动监测、人工触觉系统等多个领域都有很高的应用需求.本文组装了一种可实现二维映射,基于图案化铌酸钾钠纳米棒阵列的压力传感器矩阵.水热合成的正交相铌酸钾钠纳米棒具有优异的柔性和弹性,同时具有较高的压电性能.因此在组装的压力传感器矩阵中,单个单元尺寸低至200μm,灵敏度可达0.20 V N^(-1),检测限低至20 g,且器件的稳定性高.空间分离的传感器单元能有效避免交叉干扰,使器件能准确地实现自驱动压力成像,精确地分析外部压力刺激.

关键词：压力传感器运动监测电子皮肤电子屏幕交叉干扰驱动压力单元尺寸自供电