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德科学家发明可折叠电子屏幕
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《电子世界》 2003年第5期79-79,共1页
关键词 德国 电子屏幕 电解“薄膜” 折叠功能
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Crystallization Behavior and Properties of B-Doped ZnO Thin Films Prepared by Sol-Gel Method with Different Pyrolysis Temperatures
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作者 文斌 刘超前 +6 位作者 王楠 王华林 刘世民 姜薇薇 丁万昱 费维栋 柴卫平 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2016年第2期229-233,I0002,共6页
Boron-doped zinc oxide transparent (BZO) films were prepared by sol-gel method. The effect of pyrolysis temperature on the crystallization behavior and properties was systematically investigated. XRD patterns reveal... Boron-doped zinc oxide transparent (BZO) films were prepared by sol-gel method. The effect of pyrolysis temperature on the crystallization behavior and properties was systematically investigated. XRD patterns revealed that the BZO films had wurtzite structure with a preferential growth orientation along the c-axis. With the increase of pyrolysis temperature, the particle size and surface roughness of the BZO films increased, suggesting that pyrolysis temperature is the critical factor for determining the crystallization behavior of the BZO films. Moreover, the carrier concentration and the carrier mobility increased with increasing the pyrolysis temperature, and the mean transmittance for every film is over 90% in the visible range. 展开更多
关键词 Transparent conduction oxide Thin film Boron-doped ZnO Pyrolysis tem-perature SOLGEL
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An analytical model to explore open-circuit voltage of a-Si:H/c-Si heterojunction solar cells 被引量:1
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作者 钟春良 耿魁伟 +1 位作者 罗兰娥 杨迪武 《Journal of Central South University》 SCIE EI CAS CSCD 2016年第3期598-603,共6页
The effect of the parameters on the open-circuit voltage, V_(OC) of a-Si:H/c-Si heterojunction solar cells was explored by an analytical model. The analytical results show that V_(OC) increases linearly with the logar... The effect of the parameters on the open-circuit voltage, V_(OC) of a-Si:H/c-Si heterojunction solar cells was explored by an analytical model. The analytical results show that V_(OC) increases linearly with the logarithm of illumination intensity under usual illumination. There are two critical values of the interface state density(D_(it)) for the open-circuit voltage(V_(OC)), D_(it)^(crit,1) and D_(it)crit,2(a few 1010 cm^(-2)·e V^(-1)). V_(OC) decreases remarkably when D_(it) is higher than D_(it)^(crit,1). To achieve high V_(OC), the interface states should reduce down to a few 1010 cm^(-2)·e V^(-1). Due to the difference between the effective density of states in the conduction and valence band edges of c-Si, the open-circuit voltage of a-Si:H/c-Si heterojunction cells fabricated on n-type c-Si wafers is about 22 mV higher than that fabricated on p-type c-Si wafers at the same case. V_(OC) decreases with decreasing the a-Si:H doping concentration at low doping level since the electric field over the c-Si depletion region is reduced at low doping level. Therefore, the a-Si:H layer should be doped higher than a critical value of 5×10^(18) cm^(-3) to achieve high V_(OC). 展开更多
关键词 solar cells a-Si:H/c-Si heterojunctions open-circuit voltage
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A Mathematic Model of Gas-diffusion Electrodes in Contact with Liquid Electrolytes
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作者 李俊 奚旦立 +1 位作者 石勇 吴锡慧 《Journal of Donghua University(English Edition)》 EI CAS 2008年第4期463-467,共5页
A mathematic model is developed which is applied to analyze the main factors that affect electrode performance and to account for the process of reaction and mass transfer in gas-diffusion electrodes in contact with l... A mathematic model is developed which is applied to analyze the main factors that affect electrode performance and to account for the process of reaction and mass transfer in gas-diffusion electrodes in contact with liquid electrolytes. Electrochemical Thiele modulus φ^2 and electrochemical effectiveness factor η are introduced to elucidate the effects of diffusion on electrochemical reaction and utilization of the gas-diffusion electrode. Profile of the reactant along axial direction is discussed, dependence of electrode potential V on current density J, are predicated by means of the newly developed mathematical model. 展开更多
关键词 fuel cell fuel cell membrane reactor liquid electrolyte gas-diffusion electrode mathematical model
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Effects of electrolytic concentration on properties of micro-arc film on Ti6Al4V alloy 被引量:9
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作者 SHI Xing-ling WANG Qing-liang WANG Fu-shun GE Shi-rong 《Mining Science and Technology》 EI CAS 2009年第2期220-224,共5页
To study the effect of electrolytic concentration,bioactive ceramic films containing Ca and P on the surface of the Ti6Al4V alloy were prepared by micro-arc oxidation(MAO) in aqueous solutions of different concentrati... To study the effect of electrolytic concentration,bioactive ceramic films containing Ca and P on the surface of the Ti6Al4V alloy were prepared by micro-arc oxidation(MAO) in aqueous solutions of different concentrations.Composition,micro-morphology,wettability of the films and their corrosion behavior in a Hank's SBF were studied.Our experimental results show that the film is mainly composed of anatase,rutile and amorphous phases.With an increase in electrolytic concentration,the ratio of rutile in films enlarge and small amounts of calcium phosphate(Ca3(PO4)2) and hydroxyapatite(HA) appear.The number of micropores in films increases but their dimensions decrease and their porosities increase slightly.As the surface roughness of MAO film increases with concentration,the wettablility of the oxide film improves continually,while micro-hardness increases at first and then decreases.MAO treatment clearly improves the corrosion resistance of substrates in a Hank's SBF. 展开更多
关键词 titanium alloy micro-arc oxidation ROUGHNESS contact angle micro-hardness anodic polarization
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Corrosion Resistance of Titanium Bipolar Plate Enhanced by TiN Film
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作者 Deng Zhenzhen Dai Zhengfei +6 位作者 Wu Weibo Lai Ruisi Feng Qing Jia Bo Wang Chen Lv Yuanjiang Ma Fei 《稀有金属材料与工程》 SCIE EI CAS CSCD 北大核心 2024年第10期2755-2765,共11页
To improve the corrosion resistance of titanium(Ti)bipolar plate,titanium nitride(TiN)film was prepared on the surface of commercial TA1 pure titanium by magnetron reactive sputtering and pulse laser deposition(PLD)te... To improve the corrosion resistance of titanium(Ti)bipolar plate,titanium nitride(TiN)film was prepared on the surface of commercial TA1 pure titanium by magnetron reactive sputtering and pulse laser deposition(PLD)techniques,and the film prepared under different process parameters were evaluated.Results show that dense and complete TiN film can be obtained on TA1 surface under different preparation processes,and the corrosion current density of Ti substrate significantly increases.However,the composition of the film prepared by magnetron reactive sputtering is affected by the oxygen competition reaction,and its homogeneity is inferior to that of the film prepared by PLD.The comprehensive performance of the PLD-prepared film shows excellent characteristics in the terms of low corrosion current density(0.025μA·cm^(−2)),moderate corrosion overpotential(−0.106 V),and good hydrophobicity. 展开更多
关键词 proton exchange membrane water electrolyzer bipolar plate process parameter TiN film corrosion resistance
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科学家发明可折叠电子屏幕
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《中外科技信息》 北大核心 2003年第4期71-71,共1页
关键词 可折叠电子屏幕 特点 厚度 电解“薄膜” 色彩 西门子公司 德国
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Ultrathin ZnO membranes a few atomic layers in thickness
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作者 YIN JianBo XIA HuaRong +1 位作者 LIANG Jia ZHANG GengMin 《Science China(Technological Sciences)》 SCIE EI CAS 2014年第2期315-321,共7页
For the first time we fabricated ZnO membranes with thicknesses of 2.4 nm by a facile one-pot synthesis in aqueous solution.The crystal analysis revealed that the hexagonal ZnO membranes were about 10 atomic layers in... For the first time we fabricated ZnO membranes with thicknesses of 2.4 nm by a facile one-pot synthesis in aqueous solution.The crystal analysis revealed that the hexagonal ZnO membranes were about 10 atomic layers in thickness.The ZnO membranes bent,scrolled,intersected with each other,and self-assembled to particles in micrometre size.The hierarchical assemblies showed sponge-like structures with room inside.In the growth process,a cationic polyelectrolyte was utilized to modulate growth behavior of the ZnO crystals.As a result,the preferred growth direction of ZnO membranes is along 0110,which was perpendicular to[0001]growth direction in a typical hydrothermal synthesis.The growth mechanism of the membranes was also discussed. 展开更多
关键词 ZNO 2D materials NANOSHEETS hierarchical structures
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A dual-electrolyte system for photoelectrochemical hydrogen generation using CuInS_2-In_2O_3-TiO_2 nanotube array thin film 被引量:1
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作者 Charlene Ng Jung-Ho Yun +3 位作者 Hui Ling Tan Hao Wu Rose Amal Yun Hau Ng 《Science China Materials》 SCIE EI CSCD 2018年第6期895-904,共10页
The utilization of Na2S/Na2SO3 mixture as the electrolyte solution to stabilize sulfide anode in a photoelectrochemical cell for hydrogen evolution generally compromises the current-to-hydrogen efficiency(ηcurrent)... The utilization of Na2S/Na2SO3 mixture as the electrolyte solution to stabilize sulfide anode in a photoelectrochemical cell for hydrogen evolution generally compromises the current-to-hydrogen efficiency(ηcurrent) of the system. Here, the employment of a dual-electrolyte system,that is, Na2S/Na2SO3 mixture and p H-neutral Na2SO4 as the respective electrolyte solutions in the anode and cathode chambers of a water splitting cell is demonstrated to suppress the photocorrosion of CuInS2-In2O3-TiO2 nanotube(CISIn2O3-TNT) heterostructure, while simultaneously boosts theηcurrent. Although n-type CIS and In2O3 nanoparticles can be easily formed on TNT array via facile pulse-assisted electrodeposition method, conformal deposition of the nanoparticles homogeneously on the nanotubes wall with preservation of the TNT hollow structure is shown to be essential for achieving efficient charge generation and separation within the heterostructure. In comparison to Na2S/Na2SO3 solution as the sole electrolyte in both the anode and cathode chambers, introduction of dual electrolyte is shown to not only enhance the photostability of the CIS-In2O3-TNT anode, but also lead to near-unity ηcurrentas opposed to the merely 20% ηcurrentof the single-electrolyte system. 展开更多
关键词 dual-electrolyte hydrogen generation PHOTOELECTROCHEMICAL TiO2 nanotubes CuInS2
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