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Enhanced Photoelectric Property of Mo-C Codoped TiO2 Films Deposited by RF Magnetron Cosputtering 认领 引用 被引量：2
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作者 罗胜耘 YAN Bingxi 沈杰 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2017年第2期223-228,共6页
Mo-C codoped TiO2 films were prepared by RF magnetron cosputtering. Ultraviolet-visible spectroscopy, atomic force microscopy, X-ray photoelectron spectroscopy, energy dispersive X-ray Analysis and X-Ray Diffraction w... Mo-C codoped TiO2 films were prepared by RF magnetron cosputtering. Ultraviolet-visible spectroscopy, atomic force microscopy, X-ray photoelectron spectroscopy, energy dispersive X-ray Analysis and X-Ray Diffraction were used to study the influences of codoping on energy gap, surface morphology, valence states of elements, ions content and crystal structure, respectively. The concentration of photogenerated carriers was measured by studying photocurrent density, while catalytic property was evaluated by observing degradation rate of methylene blue under visible light. A Mo-doped TiO2 film, whose content of Mo had been optimized in advance, was prepared and later used for subsequent comparisons with codoped samples. The result indicates that Mo-C codoping could curtail the energy gap and shift the absorption edge toward visible range. Under the illumination of visible light, codoped TiO2 films give rise to stronger photocurrent due to smaller band gaps. It is also found that Mo, C codoping results in a porous surface, whose area declines gradually with increasing carbon content. Carbon and Molybdenum doses were delicately optimized. Under the illumination of visible light, sample doped with 9.78at% carbon and 0.36at% Mo presents the strongest photocurrent which is about 8 times larger than undoped TiO2 films, and about 6 times larger than samples doped with Mo only. 展开更多
关键词 Mo-C codoping TiO2 film magnetron sputtering photoelectric photocatalytic property
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Photocatalytic Property of TiO2 Films Deposited by Pulsed DC Magnetron Sputtering 认领 引用 被引量：1
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作者 Wenjie ZHANG, Shenglong ZHU, Ying LI and Fuhui WANGState Key Laboratory for Corrosion and Protection, Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016, China 《Journal of Materials Science & Technology》 SCIE EI CAS 2004年第1期31-34,共4页
TiO2 thin films were prepared by DC magnetron sputtering with the oxygen flow rate higher than the threshold. The film deposited for 5 h was of anatase phase with a preferred orientation along the direction, but the f... TiO2 thin films were prepared by DC magnetron sputtering with the oxygen flow rate higher than the threshold. The film deposited for 5 h was of anatase phase with a preferred orientation along the direction, but the films deposited for 2 and 3 h were amorphous. The transmittance and photocatalytic activity of the TiO2 films increased constantly with increasing film thickness. When the annealing temperature was lower than 700℃, only anatase grew in the TiO2 film. TiO2 phase changed from anatase to rutile when the annealing temperature was above 800℃. The photocatalytic activity decreased with increasing annealing temperature. 展开更多
关键词 TiO2 film Photocatalytic activity DC magnetron sputtering Film characteristic
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Formation Mechanistism Study of TiO2 Film Comprising Nanotubes and Nanoparticles 认领 引用
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作者 杨笛 王义全 +3 位作者 任国斌 冯帅 陈嫒媛 王文忠 《Chinese Journal of Chemical Physics》 SCIE EI CAS CSCD 2012年第1期91-95,I0004,共5页
A novel titanium dioxide （TiO2） film comprising both nanotubes and nanopaticles was fabricated by an anodization process of the modified titanium. The local electric field at the anodized surface was simulated and i... A novel titanium dioxide （TiO2） film comprising both nanotubes and nanopaticles was fabricated by an anodization process of the modified titanium. The local electric field at the anodized surface was simulated and its influence on the morphology of the TiO2 film was discussed. The results show that the electric field strength is enhanced by the covering. The growth rate of TiO2 increases with the assist of the local electric field. However, TiO2 dissolution is hindered since the local electric field prevents [TiF6]6- from diffusing. It means that the balance condition for the formation of nanotubes is broken, and TiO2 nanoparticles are formed. Moreover, the crystal structure of the TiO2 film was confirmed using X-ray diffraction and Raman analysis. The anatase is a main phase for the proposed film. 展开更多
关键词 Anodization TiO2 film Nanotube
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Time-resolved Microwave Conductivity Studies on the Chemical Treatment of the Nanocrystalline Porous TiO2 Films 认领 引用
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作者 YuanLIN XuRuiXIAO +3 位作者 WeiYingLI XuePingLI WeiBoWANG imgVongCHENG 《Chinese Chemical Letters》 SCIE CAS 2003年第7期734-736,共3页
Effect of Ti(iso-C3H7O)4 treatment on the photoinduced charge carrier kinetics of nanocrystalline porous TiO2 films is studied by time-resolved microwave conductivity measurements. Analysis of the transient photocondu... Effect of Ti(iso-C3H7O)4 treatment on the photoinduced charge carrier kinetics of nanocrystalline porous TiO2 films is studied by time-resolved microwave conductivity measurements. Analysis of the transient photoconductivity decays indicates that Ti(iso-C3H7O)4 treatment leads to an increased concentration of photogenerated charge carriers and a fast interfacial transfer rate of holes via the surface modification of the freshly growing TiO2 nanocrystallites. 展开更多
关键词 Nanocrystalline porous TiO2 films chemical treatment transient photoconductivity charge carrier kinetics time-resolved microwave conductivity.
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Influence of Heat Treatment Temperature on Microstructure and Bonding of TiO2 Film Coated on Diamond Particles Surface 认领 引用
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作者 刘小磐 KONG Weibing +4 位作者 XIAO Haiyan TANG Hao WAN Long HU Weida 王伟 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2017年第5期1008-1012,共5页
TiO_2 films were coated on the surface of diamond particles using a sol-gel method. The effects of heat treatment temperature on the morphology, phase composition and chemical bond of diamond particles coated with TiO... TiO_2 films were coated on the surface of diamond particles using a sol-gel method. The effects of heat treatment temperature on the morphology, phase composition and chemical bond of diamond particles coated with TiO2 films were investigated through SEM, TEM, X-ray diffraction analysis, Raman spectroscopy, FTIR, and XPS. The results showed that when being heat-treated at 600 ℃, the amorphous TiO_2 film transfered to the anatase film which bonded well with diamond substrate. Meanwhile, the Ti-O-C bond formed between TiO2 film and diamond substrate. When being heat-treated at 800 ℃, TiO2 film was still anatase, and partial diamond began to graphitize. The graphitizated carbon could also form the Ti-O-C bond with TiO_2 film, although TiO_2 film would tend to crack in this case. 展开更多
关键词 diamond TiO2 film heat treatment temperature chemical bond
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Nanostructure Study of TiO2 Films Prepared by Dip Coating Process 认领 引用 被引量：2
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作者 S.M.Attia, Jue WANG, Guangming WU, Jun SHEN and Jianhua MAPohl Institute of Solid State Physics, Tongji University, Shanghai 200092, China 《Journal of Materials Science & Technology》 SCIE EI CAS 2002年第1期31-33,共3页
The microstructure properties of the sol-gel derived TiO2 films were studied by the atomic force microscopy (AFM). The films were prepared by dip coating process. The optical properties of the films were explained on ... The microstructure properties of the sol-gel derived TiO2 films were studied by the atomic force microscopy (AFM). The films were prepared by dip coating process. The optical properties of the films were explained on the basis of the microstructure of the films. 展开更多
关键词 Atomic force microscopy TiO2 thin film Sol-gel process
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Extraction of optical constants and thickness of nanometre scale TiO2 film 认领 引用
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作者 杨莺歌 刘丕均 +1 位作者 王英 张亚非 《Chinese Physics B》 CAS 2005年第11期2335-2337,共3页
TiO2 thin films were deposited on glass substrates by sputtering in a conventional rf magnetron sputtering system. X-ray diffraction pattern and transmission spectrum were measured. The curves of refraction index and ... TiO2 thin films were deposited on glass substrates by sputtering in a conventional rf magnetron sputtering system. X-ray diffraction pattern and transmission spectrum were measured. The curves of refraction index and extinction coefficient distributions as well as the thickness of films calculated from transmission spectrum were obtained. The optimization problem was also solved using a method based on a constrained nonlinear programming algorithm. 展开更多
关键词 TiO2 thin films pointwise constrained optimization approach constrained nonlinear programming optical constants parameters extraction
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Preparation of TiO2 and SiC Films from Their Precursors Using Electrospraying 认领 引用 被引量：1
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作者 时方晓 《沈阳建筑大学学报（自然科学版）》 CAS 北大核心 2010年第6期1166-1171,共6页
Titanium dioxide(TiO2) films were prepared by cone - jet mode electrospraying a titanium ethoxideprecursor solution onto a silicon substrate.The effects of spraying time,substrate temperature and aging on thesurface m... Titanium dioxide(TiO2) films were prepared by cone - jet mode electrospraying a titanium ethoxideprecursor solution onto a silicon substrate.The effects of spraying time,substrate temperature and aging on thesurface morphology of the films prepared were studied.Thin films obtained after spraying for 600 s were aged atroom temperature to form a porous TiO2 network with pores in the size range of 100 - 500 nm.Thicker filmswere prepared by spraying for 3 000 s,but these cracked on drying although it can be concluded that films pre-pared using a higher substrate temperature were denser.By this method,SiC coating was also prepared on anAl2O3 substrate using polysilane as a precursor.The result implies the potential of an industrial production ofdye sensitized solar cells by electrospraying technique. 展开更多
关键词 electrospraying cone-jet mode porous TiO2 films SiC coating surface morphology
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Formation of TiO2 Modified Film on Carbon Steel 认领 引用 被引量：6
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作者 LaizhouSONG ShizheSONG ZhimingGAO 《Journal of Materials Science & Technology》 SCIE EI CAS 2004年第5期599-601,共3页
A new technique for preparing TiO2 modified film on carbon steel was accomplished by electroless plating and sol-gel composite process. The artificial neural network was applied to optimize the preparing condition of ... A new technique for preparing TiO2 modified film on carbon steel was accomplished by electroless plating and sol-gel composite process. The artificial neural network was applied to optimize the preparing condition of TiO2 modified film. The optimized condition for forming TiO2 modified film on carbon steel was that NiP plating for 50 min, dip-coating times as 4, heat treatment time for 2 h, and the molar ratio of complexing agent and Ti(OC4HZ9)4 kept 1.5:1. The results showed that TiO2 modified film have good corrosion resistance. The result conformed that it is feasible to design the preparing conditions of TiO2 modified film by artificial neural network. 展开更多
关键词 Electroless plating Sol-gel composite process Artificial neural network TiO2 modified film Corrosion resistance
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Electrochemical and spectroelectrochemical characterization of different mesoporous TiO2 film electrodes for the immobilization of Cytochrome c 认领 引用
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作者 Stavros KATSIAOUNIS Christina TIFLIDIS +1 位作者 Christina TSEKOURA Emmanuel TOPOGLIDIS 《Frontiers of Materials Science》 SCIE CSCD 2018年第1期64-73,共10页
In this work three different mesoporous TiO2 film electrodes were prepared and used for the immobilization of Cytochrome c （Cyt-c）. Films prepared via a standard sol-gel route （SG-films） were compared with commerc... In this work three different mesoporous TiO2 film electrodes were prepared and used for the immobilization of Cytochrome c （Cyt-c）. Films prepared via a standard sol-gel route （SG-films） were compared with commercially available benchmark nanotitania materials, namely P25 Degussa （P25-films） and Dyesol nanopaste （Dyesol films）. Their properties, film deposition characteristics and their abilities to adsorb protein molecules in a stable and functional way were examined. We investigated whether it is possible, rather than preparing TiO2 films using multistep, lengthy and not always reproducible sol-gel procedures, to use commercially available nanotitania materials and produce reproducible films faster that exhibit all the properties that make TiO2 films ideal for protein immobilization. Although these materials are formulated primarily for dye-sensitized solar cell applications, in this study we found out that protein immobilization is facile and remarkably stable on all of them. We also investigated their electrochemical properties by using cyclic voltammetry and spectroelectrochemistry and found out that not only direct reduction of Fe（III）-heme to Fe（II）-heme of immobilized Cyt-c was possible on all flms but that the adsorbed protein remained electroactive. 展开更多
关键词 TiO2 films spectroelectrochemistry cyclic voltammetry Cytochrome c
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Inverted organic solar cells with solvothermal synthesized vanadium-doped TiO2 thin films as efficient electron transport layer 认领 引用 被引量：1
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作者 Mehdi Ahmadi Sajjad Rashidi Dafeh +1 位作者 Samaneh Ghazanfarpour Mohammad Khanzadeh 《Chinese Physics B》 SCIE EI CAS CSCD 2017年第9期406-410,共5页
We investigated the effects of using different thicknesses of pure and vanadium-doped thin films of TiO2 as the electron transport layer in the inverted configuration of organic photovoltaic cells based on poly（3-hex... We investigated the effects of using different thicknesses of pure and vanadium-doped thin films of TiO2 as the electron transport layer in the inverted configuration of organic photovoltaic cells based on poly（3-hexylthiophene） P3HT：[6-6] phenyl-（6） butyric acid methyl ester（PCBM）. 1% vanadium-doped TiO2nanoparticles were synthesized via the solvothermal method. Crystalline structure, morphology, and optical properties of pure and vanadium-doped TiO2 thin films were studied by different techniques such as x-ray diffraction, scanning electron microscopy, transmittance electron microscopy, and UV–visible transmission spectrum. The doctor blade method which is compatible with roll-2-roll printing was used for deposition of pure and vanadium-doped TiO2 thin films with thicknesses of 30 nm and 60 nm. The final results revealed that the best thickness of TiO2 thin films for our fabricated cells was 30 nm. The cell with vanadium-doped TiO2 thin film showed slightly higher power conversion efficiency and great Jsc of 10.7 mA/cm^2 compared with its pure counterpart. In the cells using 60 nm pure and vanadium-doped TiO2 layers, the cell using the doped layer showed much higher efficiency. It is remarkable that the external quantum efficiency of vanadium-doped TiO2 thin film was better in all wavelengths. 展开更多
关键词 inverted polymer solar cells electron transport layer vanadium-doped TiO2 thin films solvothermal
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Antireflective and Self-cleaning Properties of SiO2/TiO2 Double-Layer Films Prepared by Cost-Effective Sol-Gel Process 认领 引用
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作者 Hui Zhang Duo-wang Fan +1 位作者 Tian-zhi Yu Cheng-long Wang 《Chinese Journal of Chemical Physics》 SCIE EI CAS CSCD 2015年第6期
关键词 SiO2/TiO2 double-layer films Antireflective Self-cleaning Sol-gel process
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High photocatalytic activity of Cu2O/TiO2/Pt composite films prepared by magnetron sputtering 认领 引用 被引量：4
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作者 Guang-Xiao Ren Bin Yu +3 位作者 Yi-Ming Liu Hong-Xia Wang Wang-Gang Zhang Wei Liang 《Rare Metals》 SCIE EI CAS CSCD 2017年第10期821-827,共7页
Cu2O/TiOa/Pt three-layer films were deposited on glass substrates using magnetron sputtering method. The surface morphology and the optical properties of the composite film were characterized by X-ray diffraction （XR... Cu2O/TiOa/Pt three-layer films were deposited on glass substrates using magnetron sputtering method. The surface morphology and the optical properties of the composite film were characterized by X-ray diffraction （XRD）, scanning electron microscopy （SEM）, ultraviolet- visible spectroscopy （UV-Vis） and photoluminescence spectroscopy （PL）. The photocatalytic activity of the samples was evaluated by the photocatalytic degradation of methyl orange （MO） aqueous solution under visible light irradiation. The results indicate that the Cu2O/TiO2/Pt composite films are made up of three layers which are Pt layer, anatase-TiO2 layer and Cu2O layer from bottom to top. The surface of the films is even and composed of regular-shaped spherical particles. The photocatalytic activity of the Cu2O/TiO2/Pt three-layer film is much higher than that of the Cu2O/TiO2 double-layer film. Such enhancement is ascribed to the presence of Pt layer, which further inhibits the photogenerated electron-hole recombination, prolongs the lifetime of the photogenerated carriers, increases the quantum efficiency and hence improves the photocatalytic activity of the film effectively. 展开更多
关键词 Cu2O/TiO2/Pt Composite films Visible light Photocatalytic activity
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TiO2-Loaded WO3 Composite Films for Enhancement of Photocurrent Density 认领 引用
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作者 Wen-Gui Wang Li Zhu +1 位作者 Yu-Yan Weng Wen Dong 《Chinese Physics Letters》 SCIE EI CAS CSCD 2017年第2期112-116,共5页
Titanium dioxide （TiO2） loaded tungsten trioxide （WO3） composite films are prepared by an E-beam vapor system. Associated with the existence of a heterojunction at the interface of TiO2 and WO3, the prepared TiO2-... Titanium dioxide （TiO2） loaded tungsten trioxide （WO3） composite films are prepared by an E-beam vapor system. Associated with the existence of a heterojunction at the interface of TiO2 and WO3, the prepared TiO2-WO3 composite film shows enhanced photocurrent density, four times than the pure WO3 film illuminated under xenon lamp, and higher incident-photon-to-current conversion e^ciency. By varying the initial TiO2 film thickness, such composite structures could be optimized to obtain the highest photocurrent density. We believe that thin TiO2 films improve the light response and increase the surface roughness of WO3 films. Furthermore, the existence of the heterojunction results in the e^cient charge carriers＇ separation, transfer process, and a lower recombination of electron-hole pairs, which is beneficial for the enhancement of photocurrent density. 展开更多
关键词 TiO2-Loaded WO3 Composite Films for Enhancement of Photocurrent Density FTO
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Electrophoretic Deposition of TiO2/Nb2O5 Composite Electrode Thin Films for Photovoltaic Application 认领 引用 被引量：1
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作者 John Njagi Nguu Bernard Odhiambo Aduda Francis Wanjala Nyongesa Robinson Juma Musembi 《Journal of Energy and Power Engineering》 CAS 2014年第4期757-764,共8页
Nano sized powders of TiO2 （titanium dioxide） and Nb2O5 （Niobium （V） oxide） were used to fabricate TiO2/Nb2O5 composites thin films by EPD （electrophoretic deposition） technique. The metal oxide powders, toget... Nano sized powders of TiO2 （titanium dioxide） and Nb2O5 （Niobium （V） oxide） were used to fabricate TiO2/Nb2O5 composites thin films by EPD （electrophoretic deposition） technique. The metal oxide powders, together with magnesium nitrate hexahydrate pellets, were suspended in propan-2-ol inside an EPD cell. The electrodes, placed 1.2 cm apart, were partially immersed in the suspension and a DC potential applied across them. Key EPD process parameters, which include applied DC electric field, deposition time and solid concentration in suspension, were optimized through visual inspection and from UV-Vis-NIR spectrophotometer spectra. The highest （55%） transmittance was obtained for films with deposition time of 90 s, powder concentration of 0.01 g/40 mL, and 35 V DC （direct current） voltage. XRD micrographs confirmed that TiO2 and Nb2O5 particles were presented in the composite film. SEM （scanning electron microscope） micrographs of the composite electrode thin films showed that porous films of high quality with well controlled morphology were deposited by using the EPD technique. 展开更多
关键词 Electrophoretic deposition TiO2/Nb2O5 composite electrode thin films.
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Effect of Annealing Temperatures on the Structural and Electrical Properties of Laser Induced Plasma for TiO2x-1Bix Thin Films 认领 引用
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作者 Sabah N. Mazhir Ghuson H. Mohamed +1 位作者 Kadhim A. Aadem Maysoon D. Radhi 《Journal of Physical Science and Application》 2016年第1期36-43,共8页
In this study, Bismuth doped Titanium dioxide thin films were deposited on glass substrates by a pulse laser deposition using laser. The effect of annealing temperature on the structural and electrical properties was ... In this study, Bismuth doped Titanium dioxide thin films were deposited on glass substrates by a pulse laser deposition using laser. The effect of annealing temperature on the structural and electrical properties was investigated. X-ray diffraction pattern for pure and doped titanium dioxide films with different doping different ratio with Bi show that these films have amorphous structure oanvert to polycrystalline structure with annealing and doping and have a good identically with standard peaks for Anatase and Rutile phases. The orientation was at specific direction for Rutile. The crystalline of films increases by the increase of doping ratio. The crystalline increased with annealing temperature. Annealed films at different annealing temperatures have been studied. The results show that these films have two activation energies and by increasing the doping ratio, the activation energies and the conductivity increase. Both the annealing and composition effects on Hall constant, density of electron carders and Hall mobility are studied. Hall Effect measurements show that all films have n- type charge conductivity and the concentration increases while the mobility decreases with doping and annealing. 展开更多
关键词 Electrical properties structural properties TiO2 thin films pulse laser deposition technique.
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Characterization and photoelectrochemical performance of Zn-doped TiO_2 films by sol-gel method 认领 引用 被引量：14
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作者 Li-ying QIAO Feng-yu XIE +3 位作者 Ming-hui XIE Cai-hua GONG Wei-lang WANG Jia-cheng GAO 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2016年第8期2109-2116,共8页
Zn-doped TiO2 (Zn?TiO2) thin films were prepared by the sol?gel method on titanium substrates with heat treatment at different temperatures. The effects of heat treatment temperatures and Zn doping on the structure, p... Zn-doped TiO2 (Zn?TiO2) thin films were prepared by the sol?gel method on titanium substrates with heat treatment at different temperatures. The effects of heat treatment temperatures and Zn doping on the structure, photocathodic protection and photoelectrochemical properties of TiO2 thin films were investigated. It is indicated that the photoelectrical performance of the Zn?TiO2 films is enhanced with the addition of Zn element compared with the pure-TiO2 film and the largest decline by 897 mV in the electrode potential is achieved under 300 °C heat treatment. SEM?EDS analyses show that Zn element is unevenly distributed in Zn?TiO2 films; XRD patterns reveal that the grain size of Zn?TiO2 is smaller than that of pure-TiO2; FTIR results indicate that Zn - O bond forms on Zn?TiO2 surface. Ultraviolet visible absorption spectra prove that Zn?TiO2 shifts to visible light region.Mott?Shottky curves show that the flat-band potential of Zn?TiO2 is more negative and charge carrier density is bigger than that ofpure-TiO2, implying that under the synergy of the width of the space-charge layer, carrier density and flat-band potential, Zn?TiO2 with 300 °C heat treatment displays the best photocathodic protection performance. 展开更多
关键词 TiO2 films Zn-doping photocathodic protection photoelectrochemical activity sol.gel method
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Influences of working pressure on properties for TiO_2 films deposited by DC pulse magnetron sputtering 认领 引用 被引量：11
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作者 ZHANG Can DING Wanyu +2 位作者 WANG Hualin CHAI Weiping JU Dongying 《Journal of Environmental Sciences》 SCIE EI CAS 2009年第6期741-744,共4页
TiO2 films were deposited at room temperature by DC pulse magnetron sputtering system.The crystalline structures,morphological features and photocatalytic activity of TiO2 films were systematically investigated by X-r... TiO2 films were deposited at room temperature by DC pulse magnetron sputtering system.The crystalline structures,morphological features and photocatalytic activity of TiO2 films were systematically investigated by X-ray diffraction（XRD）,atomic force microscopy（AFM） and ultraviolet spectrophotometer,respectively.The results indicated that working pressure was the key deposition parameter in？uencing the TiO2 film phase composition at room temperature,which directly affected its photocatalytic activity.With increasing working pressure,the target self-bias decreases monotonously.Therefore,low temperature TiO2 phase（anatase） could be deposited with high working pressure.The anatase TiO2 films deposited with 1.4 Pa working pressure displayed the highest photocatalytic activity by the decomposition of Methyl Orange solution,which the degradation rate reached the maximum（35%） after irradiation by ultraviolet light for 1 h. 展开更多
关键词 TiO2 film anatase UV induced photocatalysis DC pulse magnetron sputtering
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Improved Voltage and Fill Factor by Using Zinc Oxide Thin Film as a Barrier Layer in Dye-Sensitized Solar Cells 认领 引用 被引量：10
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作者 王鹏 王立铎 +1 位作者 李斌 邱勇 《Chinese Physics Letters》 SCIE EI CAS 2005年第10期2708-2710,共3页
A series of dye-sensitized solar cells based on ZnO-modified TiO2 nano-porous films have been prepared. The current-voltage characteristics of the cells show that the ZnO-modification can improve the open-circuit volt... A series of dye-sensitized solar cells based on ZnO-modified TiO2 nano-porous films have been prepared. The current-voltage characteristics of the cells show that the ZnO-modification can improve the open-circuit voltage and the fill factor but can decrease the short-circuit current. Dark current and transient photovoltage measurements are used to study the back reaction. It is indicated that the recombination process is suppressed by blocking the hole transporting from the nano-porous TiO2 since the surface of the semiconductor is almost fully covered with ZnO as a barrier layer. 展开更多
关键词 TIO2 FILM ELECTRODES PERFORMANCE
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Structural and optical properties of nano-spin coated sol-gel porous TiO_2 films 认领 引用 被引量：3
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作者 M.M.El-NAHASS M.H.ALI A.El-DENGLAWEY 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2012年第12期3003-3011,共9页
Three thicknesses of TiO2 films, 174, 195, and 229 nm, were deposited onto quartz substrates by sol–gel spin coating method. The as-deposited thin films were characterized by nano-crystallite with different sizes (19... Three thicknesses of TiO2 films, 174, 195, and 229 nm, were deposited onto quartz substrates by sol–gel spin coating method. The as-deposited thin films were characterized by nano-crystallite with different sizes (19–46 nm) and relatively high porous structure. Optical constants were determined and showed the lowest refractive index of 1.66 for the as-prepared films that ever reported till now. Obtained results were discussed through current theoretical ideas. 展开更多
关键词 TiO2 films optical properties nanostructure electron microscopy thin films spin coating technique
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