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Film Morphology,Emulsification of Dodecyl/Carboxyl Modified Polysiloxane and Its Application Performance on Cotton Fabrics 被引量:6
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作者 安秋凤 门靖 +3 位作者 王科峰 丁洋 亢玲娟 刘爽 《Journal of Donghua University(English Edition)》 EI CAS 2011年第4期375-378,共4页
The film morphology of dodecyl/carboxyl modified polysiloxane(RCAS) on cotton fabric or the silicon wafer was investigated and characterized by field emission scanning electron microscopy(FESEM),atomic force microscop... The film morphology of dodecyl/carboxyl modified polysiloxane(RCAS) on cotton fabric or the silicon wafer was investigated and characterized by field emission scanning electron microscopy(FESEM),atomic force microscope(AFM),and Fourier transform infrared spectrometer(FTIR).Experimental results indicate that RCAS is a good film forming material on different substrates.Relatively smooth film was formed on cotton fabric surface,on which the grooves disappeared.In addition,RCAS formed a micromorphology inhomogeneous and unsmooth film on the silicon wafer.Many high or low bright peaks distributed randomly on the film surface,especially as the field was 2μm×2 μm and the date scale was 5 nm in AFM observation.Then RCAS was emulsified with nonionic surfactant alkyl polyoxyethylene ether in order to achieve a transparent organosilicon emulsion-RCAS emulsion(RCSE),which possessed good stability.The properties of RCSE and its application performance on cotton fabrics were investigated and characterized by transmission electron microscope(TEM),particle size analysis,and voltage test instrument.The results show that the average particle size of RCAS emulsion is 28.32 nm,while the ζ voltage is-37.88 mV.Compared with untreatd cotton fabric,the softness of treated fabric can be improved with RCSE to a certain extent.At the same time,the fabric treated with RCSE acquires unique fluffy and soft handle. 展开更多
关键词 amino functional polysiloxane carboxyl containing polysiloxane film morphology polysiloxane emulsion cotton fabrics
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Vacuum deposited film growth,morphology and interfacial electronic structures of 2,7-dioctyl[1]benzothieno[3,2-b]benzothiophene(C8-BTBT)
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作者 WEI Jun-hua NIU Dong-mei GAO Yong-li 《Journal of Central South University》 SCIE EI CAS CSCD 2022年第4期1041-1061,共21页
Interfaces play critical roles in electronic devices and provide great diversity of film morphology and device performance.We retrospect the substrate mediated vacuum film growth of benchmark high mobility material 2,... Interfaces play critical roles in electronic devices and provide great diversity of film morphology and device performance.We retrospect the substrate mediated vacuum film growth of benchmark high mobility material 2,7-dioctyl[1]benzothieno[3,2-b]benzothiophene(C8-BTBT)and the interface electronic structures.The film growth of C8-BTBT molecules is diversified depending on the substrate-molecule and molecule-molecule interactions.On atomic smooth substrates C8-BTBT film grows in layer-by-layer mode while on coarse substrate it grows in islands mode.The initial molecular layer at dielectric,semiconductor and conductive substrates displays slight different lattice structure.The initial molecule orientation depends on the substrate and will gradually change to standing up configuration as in bulk phase.C8-BTBT behaves as electron donor when contacting with dielectric and stable conductive materials.This usually induces a dipole layer pointing to C8-BTBT and an upward bend bending in C8-BTBT side toward the interface.Although it is air stable,C8-BTBT is chemically reactive with some transition metals and compounds.The orientation change from lying down to standing up in the film usually leads to decrease of ionization potential.The article provides insights to the interface physical and chemical processes and suggestions for optimal design and fabrication of C8-BTBT based devices. 展开更多
关键词 interface film morphology packing configuration growth mode electronic structure chemical reaction interface dipole
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Nitridation Kinetics of Silicon Monocrystal and Morphology of Nitride Film
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作者 孙贵如 李立本 +3 位作者 李文超 王俭 冯艳丽 李净 《Rare Metals》 SCIE EI CAS CSCD 1993年第1期49-56,共8页
Basing on TGA (thermal gravimetric analysis) of thermal nitridation at l200, l250, l300℃, respectively, analysis of high temperature kinetics for nitridation of silicon monocrystal has been carried out. According to ... Basing on TGA (thermal gravimetric analysis) of thermal nitridation at l200, l250, l300℃, respectively, analysis of high temperature kinetics for nitridation of silicon monocrystal has been carried out. According to the theory for kinetics of reaction of vapour with solid phase a nitridation kinetic model, from which it can be shown thal the rate of nitridation reaction of silicon crystal should be controlled by three stage limiting factors, was proposed. These limiting factors are chemical reaction, chemical reaction mixed with diffusion and diffu- sion. Using this model to treat our experimental data, satisfactory correlation coefficient and apparent activation energy of nitridation of p-type (lll) silicon crystal have been obtained. The nitride film was identi' fied to be a-Si_3N_4 (Hexagonal, a=0.7758nm,c_o=0.5623nm) by X-ray diffraction analysis. Morphology of the nitride films formed in different nitridation duration was observed in both planar andcross-sectional views by SEM (scanning electron microscope). 展开更多
关键词 Nitridation mechanism Silicon monocrystal Nitride film morphology
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Oxidation Kinetics of (111) Silicon Monocrystal and Morphology of Oxide Film in Dry Oxygen Atmosphere
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作者 李文超 樊自拴 +1 位作者 孙贵如 秦福 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 1989年第5期362-365,共4页
1. Introduction Thermal oxidation of silicon monocrystalis a very important process in fabricationof metal--oxide--semiconductor (MOS) devices.In recent years it has received great atten-tion. Various proposals for ox... 1. Introduction Thermal oxidation of silicon monocrystalis a very important process in fabricationof metal--oxide--semiconductor (MOS) devices.In recent years it has received great atten-tion. Various proposals for oxidation modeshave been made by different groups.Now most of the authors working in thisfield hold the view that the oxidation rateof silicon obeys a typical parabolic rule,that is, the oxidation reaction is controlledby diffusion. The experimental data inRef. can be taken and a kinetic curve 展开更多
关键词 oxidation mechanism silicon monocrystal oxide film morphology
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Morphology Study of Oriented Sm BCO Film Deposited by MOCVD
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作者 汪婷 涂溶 +3 位作者 KE Wang ZHANG Song ZHANG Lianmeng Takashi GOTO 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2016年第1期15-19,共5页
c-axis-oriented SmBa2Cu3O7(SmBCO) films have been deposited on(100)- LaA1O3(LAO)substrate by metal organic chemical vapor deposition(MOCVD) technique.The effects of deposition temperature(T(dep)) and total... c-axis-oriented SmBa2Cu3O7(SmBCO) films have been deposited on(100)- LaA1O3(LAO)substrate by metal organic chemical vapor deposition(MOCVD) technique.The effects of deposition temperature(T(dep)) and total pressure(P(tot)) on the orientation and microstructure of SmBCO films were investigated.The orientation of SmBCO films transformed from α-axis to c-axis with increasing of T(dep) from 900 to 1 100℃.At T(dep)=1 050℃,SmBCO films had c-axis orientation and tetragon surface.At P(tot)^(dep)=400-800 Pa and T(dep)=1 050 ℃,totally c-axis-oriented SmBCO films were obtained.The R(dep) of SmBCO films increased firstly and then decreased with increasing P(tot).The surface of SmBCO films exhibited tetragon morphology at 1 050 ℃ and400 Pa.Maximum thickness of SmBCO film deposited was 1.2μm at P(tot)= 600 Pa,and the corresponding R(dep)was 7.2 μm·h^(-1). 展开更多
关键词 SmBCO film MOCVD orientation morphology
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Formation and Morphology of Anodic Oxide Films of Ti
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作者 Kyo-Han Kim X.L.Zhu and Won-Woo Son Department of Dental Biomaterials, Kyungpook National University, Taegu 700-422, Korea Yong-Soo Jeong Department of Surface Engineering, Korea institute of Machinery and Materials, Changwon, Korea 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2001年第1期33-34,共2页
The morphology and structure of the oxide films of Ti in H3PO4 were investigated by galvanos tatic anodization, SEM and XRD. The oxide film grew from some pores in the grooves to layered microdomains as increasing ano... The morphology and structure of the oxide films of Ti in H3PO4 were investigated by galvanos tatic anodization, SEM and XRD. The oxide film grew from some pores in the grooves to layered microdomains as increasing anodizing voltage. The crystallinity of the oxide films decreased with the increase of the concentration of the electrolyte. The model has been proposed for the growth of the oxide films by two steps, i.e. by uniform thickening and by local deposition. 展开更多
关键词 RES Formation and morphology of Anodic Oxide films of Ti
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Improvement of Surface Morphology of Yttrium-Stabilized Zirconia Films Deposited by Pulsed Laser Deposition on Rolling Assisted Biaxially Textured Substrate Tapes
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作者 王梦麟 刘林飞 李贻杰 《Chinese Physics Letters》 SCIE CAS CSCD 2015年第11期101-105,共5页
The surface morphology of buffer layer yttrium-stabilized zirconia (YSZ) of YBa2CuaO7-σ (YBCO) high temperature superconducting films relies on a series of controllable experimental parameters. In this work, we f... The surface morphology of buffer layer yttrium-stabilized zirconia (YSZ) of YBa2CuaO7-σ (YBCO) high temperature superconducting films relies on a series of controllable experimental parameters. In this work, we focus on the influence of pulsed laser frequency and target crystalline type on surface morphology of YSZ films deposited by pulsed laser deposition (PLD) on rolling assisted biaxially textured substrate tapes. Usually two kinds of particles are observed in the YSZ layer: randomly distributed ones on the whole film and self-assembled ones along grain boundaries. SEM images are used to prove that particles can be partly removed when choosing dense targets of single crystalline. Lower frequency of pulsed laser also contributes to a smoother film surface. TEM images are used to view the crystalline structure of thin film. Thus we can obtain a basic understanding of how to prepare a particle-free YSZ buffer layer for YBCO in optimized conditions using PLD. The YBCO layer with nice structure and critical current density of around 5 MA/cm2 can be reached on smooth YSZ samples. 展开更多
关键词 YSZ Improvement of Surface morphology of Yttrium-Stabilized Zirconia films Deposited by Pulsed Laser Deposition on Rolling Assisted Biaxially Textured Substrate Tapes PLD
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Morphology and Structure of SiO_2 Film Using Thermal Oxidation Process on(111)Silicon Crystals in Dry Oxygen Atmosphere
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作者 TaokaT. 《Rare Metals》 SCIE EI CAS CSCD 1989年第1期32-38,共7页
By means of scanning electron microscope(SEM)and high voltage electron microscope(HVEM)we have observed and analysed morphology and micro-structure of silicon oxide film with different thickness formed on(111)silicon ... By means of scanning electron microscope(SEM)and high voltage electron microscope(HVEM)we have observed and analysed morphology and micro-structure of silicon oxide film with different thickness formed on(111)silicon monocrystal under dry oxygen atmosphere at 1100℃.Compared with their oxidation kinetic curves consisted of three stages,we suggested a mechanism on forming silicon oxide film.According to electron and X-ray diffraction analyses the silicon oxide films consisted of silica with different crystal structure.We also have discussed a stacking fault and a dislocation formed in the Si-Sio_2 interface region simulaneously forming silicon oxide film. 展开更多
关键词 Silicon Crystals in Dry Oxygen Atmosphere morphology and Structure of SiO2 film Using Thermal Oxidation Process on SIO
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ADHESION STRENGTH OF COATING SUBSTRATE AND SURFACE MORPHOLOGY OF PRETREATMENT 被引量:1
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作者 ZhouLanying ZhouHuanjiang YangJian 《Chinese Journal of Mechanical Engineering》 SCIE EI CAS CSCD 2003年第2期217-220,224,共5页
Premature failure of coated tool often results from a poor adhesion of coating-substrate and shortens the lifetime of the tool. The results of increasing the adhesion strength of thin film coatings on cutting tool ins... Premature failure of coated tool often results from a poor adhesion of coating-substrate and shortens the lifetime of the tool. The results of increasing the adhesion strength of thin film coatings on cutting tool inserts by pretreating the inserts with sandblasting technique to obtain a desirable surface morphology of the inserts are presented. A geometric model representing the ideal surface morphology is established to enhance the nucleation density and adhesion strength of coating-substrate. Thin film coating experiment is conducted on the substrates of four different sample groups. Indentation and wear tests are performed on coated inserts to evaluate the effect of sandblasting on the adhesion strength of the coatings. A theoretical analysis is provided on the formation and growth of atom clusters in terms of the contact angle and the thermodynamic barrier of a substrate to predict thin film nucleation. 展开更多
关键词 Thin film coating Adhesion strength Surface morphology
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Effect of Annealing Temperature on the Formation of Silicides and the Surface Morphologies of PtSi Films 被引量:2
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作者 Jinghua YIN Meicheng LI +3 位作者 Yufeng ZHENG Zhong WANG Wei CAI Peilin WANG School of Materials Science and Engineering, Harbin institute of Technology, Harbin 150001, China 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2001年第1期39-40,共2页
The effect of annealing temperature on the formation of the PtSi phase. distribution of silicides and the surface morphologies of silicides films is investigated by XPS. AFM. It is shown that the phase sequences of t... The effect of annealing temperature on the formation of the PtSi phase. distribution of silicides and the surface morphologies of silicides films is investigated by XPS. AFM. It is shown that the phase sequences of the films change from Pt-Pt2Si-PtSi-Si to Pt+Pt2Si+PtSi-PtSi-Si or Pt+Pt2Si+PtSi-PtSi-st with an increase of annealing temperature and the reason for the formation of mixed layers is discussed. 展开更多
关键词 Effect of Annealing Temperature on the Formation of Silicides and the Surface Morphologies of PtSi films
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Effect of initial precursor concentration on TiO_2 thin film nanostructures prepared by PCVD system 被引量:1
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作者 Hoang Hai Nguyen Dong-Joo Kim +1 位作者 Dong-Wha Park Kyo-Seon Kim 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2013年第3期375-381,共7页
TiO2 thin film was prepared on Si substrate by plasma chemical vapor deposition (PCVD) system and the morphologies of ZiO2 thin film were controlled by adjusting the initial precursor concentration. As the initial t... TiO2 thin film was prepared on Si substrate by plasma chemical vapor deposition (PCVD) system and the morphologies of ZiO2 thin film were controlled by adjusting the initial precursor concentration. As the initial titanium tetra-isopropoxide (TTIP) concentration increases in PCVD reactor, the shapes of TiO2 particles generated in PCVD reactor change from the spherical small-sized particles around 20 nm and spherical large-sized particles around 60 nm to aggregate particles around 100 nm. The TiO2 particles with different shapes deposit on the substrate and become the main building blocks of resulting TiO2 thin film. We observed the TiO2 thin film with smooth morphology at low initial TTIP concentration, granular morphology at medium initial TTIP concentration, and columnar morphology at high initial TTIP concentration. It is proposed that we can prepare the TiO2 thin film with controlled morphologies in one-step process just by adjusting the initial precursor concentration in PCVD . 展开更多
关键词 plasma chemical vapor deposition thin film growth morphology of TiO2 thin film shape of TiO2 particles
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Effects of Annealing Processes on CuxSi(1-x) Thin Films
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作者 章嵩 WU Jun +3 位作者 HE Zhiqiang 涂溶 SHI Ji ZHANG Lianmeng 《Journal of Wuhan University of Technology(Materials Science)》 SCIE EI CAS 2016年第1期31-34,共4页
The CuxSi(1-x) thin films have been grown by pulsed laser deposition(PLD) with in situ annealing on Si(001) and Si(111),respectively.The transformation of phase was detected by X-ray diffraction(XRD).The res... The CuxSi(1-x) thin films have been grown by pulsed laser deposition(PLD) with in situ annealing on Si(001) and Si(111),respectively.The transformation of phase was detected by X-ray diffraction(XRD).The results showed that the as-deposited films were composed of Cu on both Si(001) and Si(111).The annealed thin films consisted of Cu +η "-Cu3Si on Si(001) while Cu +η'-Cu3Si on Si(111),respectively,at annealed temperature(Ta)= 300-600℃.With the further increasing of Ta,at Ta= 700℃,there was only one main phase,η"-Cu3Si on Si(001) while η'-Cu3Si on Si(111),respectively.The annealed thin films transformed from continuous dense structure to scattered-grain morphology with increasing Ta detected by field emission scanning electron microscope(FESEM).It was also showed that the grain size would enlarge with increasing annealing time(ta). 展开更多
关键词 CuxSi1-x thin films PLD phase surface morphology
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ATOMIC FORCE MICROSCOPY OBSERVATION OF MAGNETRON SPUTTERED ALUMINUM-SILICON ALLOY FILMS
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作者 J.W.Wu,J.H. Fang and Z.H.Lu (National Laboratory of Molecule and Biomolecule Electronics,Southeast University,Nanjing 210096, China 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 1996年第4期263-266,共4页
wo different surface morphology characteristics of magnetron sputtered aluminumsilicon(Al-Si)alloy films deposited at 0 and 200℃ were observed by atomic force microscopy(AFM).One is irregularly shaped grains put togt... wo different surface morphology characteristics of magnetron sputtered aluminumsilicon(Al-Si)alloy films deposited at 0 and 200℃ were observed by atomic force microscopy(AFM).One is irregularly shaped grains put togther on a plane.The other is irregularly shaped grains Piled up in space. Nanometer-sized particles with heights from 1.6 to 2.9 nm were first observed. On the basis of these observations the growth mechanism of magnetron sputtered films is discussed. 展开更多
关键词 magnetron sputtering Al-Si alloy surface morphology atomic force microscopy film growth mechanism
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Advanced Strategies of Passivating Perovskite Defects for High-Performance Solar Cells 被引量:1
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作者 Chuang Sun Lei Xu +2 位作者 Xilin Lai Zhengping Li Ming He 《Energy & Environmental Materials》 SCIE EI CAS CSCD 2021年第3期293-301,共9页
Organic–inorganic halide perovskite(OIHP)solar cells have garnered great attention in the last decade since they continuously approach the Shockley–Queisser Limit.Compared with conventional organic and inorganic sem... Organic–inorganic halide perovskite(OIHP)solar cells have garnered great attention in the last decade since they continuously approach the Shockley–Queisser Limit.Compared with conventional organic and inorganic semiconductors,OIHPs possess the high tolerance on defects due to the dominated intrinsically shallow-level carrier-trapping centers.However,the existence of defects still causes the ion migration,produces the hysteresis effect,and accelerates the film degradation,eventually suppressing the device efficiency and stability.In this Review Article,we summarize recent impressive advance on passivating OIHP defects and discuss the future horizon of exploiting high-efficiency and long-stability OIHP solar cells in terms of defect managements. 展开更多
关键词 DEFECTS film morphology organic-inorganic hybrid perovskites PASSIVATION
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Getting to the Bottom Morphology of Block Copolymer Thin Films 被引量:1
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作者 Wen-jin Fan Guo-qiang Fan +1 位作者 张晓华 杨朝晖 《Chinese Journal of Polymer Science》 SCIE CAS CSCD 2016年第1期88-93,共6页
We demonstrate a general approach for attaining the bottom morphology of block copolymer(BCP) thin films. In our former measurements on PS-b-PMMA films, surface morphology maps of the BCP films revealed distinct ord... We demonstrate a general approach for attaining the bottom morphology of block copolymer(BCP) thin films. In our former measurements on PS-b-PMMA films, surface morphology maps of the BCP films revealed distinct ordering regimes where the cylinders orient predominantly perpendicular or parallel to the interface and an ‘intermediate' regime where these morphologies coexist. However, this earlier work did not explore the bottom morphology of BCP thin films. In this study, we investigated the block copolymer morphology near the solid substrate in the cast block copolymer film having a perpendicular cylinder morphology on the surface. 展开更多
关键词 Block copolymer Thin film morphology
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Water and nutrient recovery from urine:A lead up trail using nano-structured In_(2)S_(3)photo electrodes
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作者 R Jayakrishnan T R Sreerev Adith Varma 《Chinese Physics B》 SCIE EI CAS CSCD 2021年第5期531-535,共5页
Developments of economic systems are critical for bio-regenerative life support systems in manned space missions.In this work we report on the feasibility of using two direct sunlight powered processes sequentially fo... Developments of economic systems are critical for bio-regenerative life support systems in manned space missions.In this work we report on the feasibility of using two direct sunlight powered processes sequentially for the recovery of water and nutrients from urine.The work presents experimental evidence on nutrient and water recovery achieved using the proto-type designed and developed.We report the design and testing of a solar still which would serve on the nutrient recovery front.The cooled condensate from the solar still is fed into a solar powered electrolysis unit where nano-structured indium sulphide(In_(2)S_(3))thin films coated over fluorine doped tin oxide(SnO_(2):F)substrate serve as one of the working electrodes.The electrolysis takes place in the absence of an electrolyte which manifests as a technical achievement of our work.Our results show that the COD level in the recycled water is very low.The In_(2)S_(3)photo-electrodes are stable without any physical damage after the process. 展开更多
关键词 SEMICONDUCTORS water quality thin film structure and morphology ELECTROLYSIS
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Ripening of single-layer InGaAs islands on GaAs(001)
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作者 刘珂 周清 +5 位作者 周勋 郭祥 罗子江 王继红 胡明哲 丁召 《Chinese Physics B》 SCIE EI CAS CSCD 2013年第2期381-384,共4页
The present paper discusses our investigation of InGaAs surface morphology annealed for different lengths of time.After annealing for 15 min,the ripening of InGaAs islands is completed.The real space scanning tunnelin... The present paper discusses our investigation of InGaAs surface morphology annealed for different lengths of time.After annealing for 15 min,the ripening of InGaAs islands is completed.The real space scanning tunneling microscopy(STM) images show the evolution of InGaAs surface morphology.A half-terrace diffusion theoretical model based on thermodynamic theory is proposed to estimate the annealing time for obtaining flat morphology.The annealing time calculated by the proposed theory is in agreement with the experimental results. 展开更多
关键词 scanning tunneling microscopy morphology of films ANNEALING diffusion in nanoscale solids
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EFFECT OF VACUUM ON THE CRYSTAL FORM AND MORPHOLOGY OF THE EVAPORATED FILM OF COPPER PHTHALOCYANINE
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作者 石祖荣 杨启云 常龙存 《Chinese Science Bulletin》 SCIE EI CAS 1986年第16期1108-1111,共4页
In a previous paper, we have reported the relationship between the crystallite orientation of the evaporated film of copper phthalacyanine (PcCu) (α-form) and the incident angle of molecular beam at 10-5 torr. In... In a previous paper, we have reported the relationship between the crystallite orientation of the evaporated film of copper phthalacyanine (PcCu) (α-form) and the incident angle of molecular beam at 10-5 torr. In this paper, we shall show some research results about vacuum effects on the crystal forms and the morphology of the evaporat- 展开更多
关键词 In EFFECT OF VACUUM ON THE CRYSTAL FORM AND morphology OF THE EVAPORATED film OF COPPER PHTHALOCYANINE
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Vapour-diffusion assisted growth of oriented α-cobalt hydroxide thin films 被引量:1
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作者 Dermot O’Hare 《Particuology》 SCIE EI CAS CSCD 2010年第3期188-191,共4页
Layered α-cobalt hydroxides Co(OH1.65 Cl0.35.0.5H2O (1), Co(OH)1.75(NO3)0.25.0.1H2O(2) with unique macro- and microscale morphologies have been synthesised by a low temperature, ammonia-controlled vapour-dif... Layered α-cobalt hydroxides Co(OH1.65 Cl0.35.0.5H2O (1), Co(OH)1.75(NO3)0.25.0.1H2O(2) with unique macro- and microscale morphologies have been synthesised by a low temperature, ammonia-controlled vapour-diffusion method. The materials have thin film morphologies and were characterized by X-ray powder diffraction (XRD) and field emission scanning electron microscopy (FESEM). 展开更多
关键词 Thin films Cobalt hydroxide Hydrotalcite morphology control
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Effects of Annealing Temperature on the Structural,Optical,and Electrical Properties of ZnO Thin Films Grown on n-Si<100>Substrates by the Sol–Gel Spin Coating Method 被引量:4
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作者 Aniruddh Bahadur Yadav Amritanshu Pandey S.Jit 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2014年第4期682-688,共7页
The effects of annealing temperature on the sol–gel-derived ZnO thin films deposited on n-Sh100 i substrates by sol–gel spin coating method have been studied in this paper.The structural,optical,and electrical prope... The effects of annealing temperature on the sol–gel-derived ZnO thin films deposited on n-Sh100 i substrates by sol–gel spin coating method have been studied in this paper.The structural,optical,and electrical properties of ZnO thin films annealed at 450,550,and 650 °C in the Ar gas atmosphere have been investigated in a systematic way.The XRD analysis shows a polycrystalline nature of the films at all three annealing temperatures.Further,the crystallite size is observed to be increased with the annealing temperature,whereas the positions of various peaks in the XRD spectra are found to be red-shifted with the temperature.The surface morphology studied through the scanning electron microscopy measurements shows a uniform distribution of ZnO nanoparticles over the entire Si substrates of enhanced grain sizes with the annealing temperature.Optical properties investigated by photoluminescence spectroscopy shows an optical band gap varying in the range of 3.28–3.15 eV as annealing temperature is increased from 450 to 650 °C,respectively.The fourpoint probe measurement shows a decrease in resistivity from 2:1 10 2to 8:1 10 4X cm with the increased temperature from 450 to 650 °C.The study could be useful for studying the sol–gel-derived ZnO thin film-based devices for various electronic,optoelectronic,and gas sensing applications. 展开更多
关键词 Nanocrystalline ZnO thin film Sol–gel Annealing Surface morphology Photoluminescence(PL) Resistivity Grain size
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