IOSR Journal of Applied Physics最新文献_第3页

Effect of Zn Doping in CdS Thin Films on Structural, Morphological and Optical Characterization 锌掺杂对CdS薄膜结构、形态和光学特性的影响

IOSR Journal of Applied Physics Pub Date : 2017-07-01 DOI: 10.9790/4861-0904015053

B. S. Munde, L. Ravangave

{"title":"Effect of Zn Doping in CdS Thin Films on Structural, Morphological and Optical Characterization","authors":"B. S. Munde, L. Ravangave","doi":"10.9790/4861-0904015053","DOIUrl":"https://doi.org/10.9790/4861-0904015053","url":null,"abstract":"In this particular experiment we employ Chemical Bath deposition Technique. Initially the bath parameters such as temperature, pH of the precursors, molarity of the solutions, deposition time were optimized for synthesis of CdS thin films. Using above optimized parameters, we prepare Cd1-xZnxS thin films for the study of effect of Zn concentration on various properties of the films. The structural, Morphological and optical characterization were investigated. The XRD spectra of the Cd1-xZnxS films exhibit the hexagonal crystal structure with preferential orientations at (100), (002), (101), (203), (102), (110), (200) and (004) planes. The planes (101), (002), (100) exhibited the wurtzite (hexagonal type) structure. XRD pattern shows increase in half width at full maximum with Zn content. SEM micrograph shows the porous fibrous network consisting of regularly arranged matrix over which regular shaped fine particles systematically distributed. The effect of Zn concentration in Cd1-xZnxS thin films clearly understood from the improvement in the microstructure of the surface morphology. The optical spectra show that absorption was found decreased with Zn content of the Cd1xZnxS.The absorption spectra shows the significant blue shifting of absorption edge (approximately from 450 – 325 nm). The optical transmittance was found maximum in the visible region (450 800 nm) and increased on increasing the Zn concentration. The x=0.2 composition having maximum transmittance 78% show the maximum 3.9 eV optical band gap which may be high enough for solar cell applications.","PeriodicalId":14502,"journal":{"name":"IOSR Journal of Applied Physics","volume":"6 1","pages":"50-53"},"PeriodicalIF":0.0,"publicationDate":"2017-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86509484","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Characterization and Evaluation of Activation Energy for Dc Conductivity of Polypyrrole/Nickel Zinc Iron Oxide Nanocomposites 聚吡咯/镍锌氧化铁纳米复合材料直流电导率的表征及活化能评价

IOSR Journal of Applied Physics Pub Date : 2017-07-01 DOI: 10.9790/4861-0904022936

V. S. Shanthala, S. Devi, M. Murugendrappa, H. Nagabhushana

{"title":"Characterization and Evaluation of Activation Energy for Dc Conductivity of Polypyrrole/Nickel Zinc Iron Oxide Nanocomposites","authors":"V. S. Shanthala, S. Devi, M. Murugendrappa, H. Nagabhushana","doi":"10.9790/4861-0904022936","DOIUrl":"https://doi.org/10.9790/4861-0904022936","url":null,"abstract":"Polymer nanocomposites of Polypyrrole and Nickel zinc iron oxide (NiZnFe2O4) are prepared by insitu polymerisation using Ammonium persulphate as oxidising agent. Various nanocomposites have been prepared by varying the level of additive material NiZnFe2O4. The formation of nanocomposites and changes in the structural and microstructural properties were investigated by using XRD, FTIR, and SEM analysis. The size of the particle was analysed by XRD using Scherrer equation and found to be in the range of 15nm 20nm. The lattice parameters were evaluated by W-H plots. DC conductivity has been measured in which activation energy (Ea) of the composites has been evaluated. Activation energies were evaluated from Arrhenius plots for all compositions. Results show that the incorporation of additive material increases the activation energy ‘Ea’ for the DC conductivity of the composites, compared to the base polymer. The increase in the activation energy ‘Ea’ is found to depend on the level of the additive in the composites. Significant increase (196%) in DC conductivity was observed for nanocomposite of 50 wt.%. Therefore such polymer nanocomposites find applications in microwave absorbers, sensors, electromagnetishielding etc.,","PeriodicalId":14502,"journal":{"name":"IOSR Journal of Applied Physics","volume":"3 1","pages":"29-36"},"PeriodicalIF":0.0,"publicationDate":"2017-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88249199","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Aberrations in Theories of Optical Aberrations 光学像差理论中的像差

IOSR Journal of Applied Physics Pub Date : 2017-07-01 DOI: 10.9790/4861-0904013743

P. Krishna, D. K. Sagar

引用次数: 0

Synthesis and Optical properties of Eu3+ doped Sr2SiO4 Phosphor for Solid State lighting applications 固态照明用Eu3+掺杂Sr2SiO4荧光粉的合成及光学性能

IOSR Journal of Applied Physics Pub Date : 2017-07-01 DOI: 10.9790/4861-0904023741

B. ChaudhariDilip, Z. ZambarePradip, H. MahajanO.

引用次数: 1

Structural and Elastic Studies of Strontium Doped Manganese Borate Glasses 掺锶硼酸锰玻璃的结构与弹性研究

IOSR Journal of Applied Physics Pub Date : 2017-07-01 DOI: 10.9790/4861-0904014449

P. Vasantharani, S. Vichitra

引用次数: 3

Dust-Acoustic Solitary Waves in a Magnetized Dusty Plasma With Ions Of Distinct Temperatures 尘埃-具有不同温度离子的磁化尘埃等离子体中的声学孤波

IOSR Journal of Applied Physics Pub Date : 2017-07-01 DOI: 10.9790/4861-0903036875

M. Anowar, I. Tasnim, M. Masud

引用次数: 0

Synthesis and Characterization of PVP capped Er and Cu codoped ZnS Nanoparticles PVP包盖Er和Cu共掺杂ZnS纳米粒子的合成与表征

IOSR Journal of Applied Physics Pub Date : 2017-06-01 DOI: 10.9790/4861-0903026266

S. Rajesh, K. Thyagarajan, G. Harish, V. Reddy

引用次数: 0

Assessment of Spatial Resolution on SPECT using Image Processing 基于图像处理的SPECT空间分辨率评估

IOSR Journal of Applied Physics Pub Date : 2017-06-01 DOI: 10.9790/4861-0903025256

E. M. Ahmed, Suhaib Alameen, Y. Khairi, M. E. Gar-elnabi

引用次数: 0

Time Dependence of Density Parameters for a Variable EoS Parameter in Brans-Dicke Framework Brans-Dicke框架中变量EoS参数密度参数的时间依赖性

IOSR Journal of Applied Physics Pub Date : 2017-06-01 DOI: 10.9790/4861-0903029096

S. Roy

{"title":"Time Dependence of Density Parameters for a Variable EoS Parameter in Brans-Dicke Framework","authors":"S. Roy","doi":"10.9790/4861-0903029096","DOIUrl":"https://doi.org/10.9790/4861-0903029096","url":null,"abstract":"The time dependence of the equation-of-state (EoS) parameter has been determined in the framework of the Brans-Dicke (BD) theory, using BD field equations and the wave equation for the scalar field, for a homogeneous, isotropic and spatially flat universe. This study is based on a model where a linear combination of BD field equations has been taken. The generalized expression of the EoS parameter is a function of the ratio of the constant coefficients used for this linear combination. Expressions of the densities of matter and dark energy and also the density parameters for matter and dark energy have been derived in terms of the EoS parameter. The value of the EoS parameter, at the present epoch, is found to depend, almost solely, on a constant that determines the time dependence of the scalar field. This parameter and the ratio of constant coefficients have been varied, to show graphically, the time dependence of the matter density and the density parameters for matter and dark energy. For certain combinations of these parameters, the matter density is found to decrease with time after initially rising to a peak value, indicating generation of matter, probably from dark energy, during an era in the past.","PeriodicalId":14502,"journal":{"name":"IOSR Journal of Applied Physics","volume":"234 5 1","pages":"90-96"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76675951","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Physical and Spectroscopic Characterization of Chemically Deposited Cd1-xMnxs Thin Films 化学沉积Cd1-xMnxs薄膜的物理和光谱表征

IOSR Journal of Applied Physics Pub Date : 2017-06-01 DOI: 10.9790/4861-0903028589

B. S. Munde, S. RavangaveL.SRavangaveL.

{"title":"Physical and Spectroscopic Characterization of Chemically Deposited Cd1-xMnxs Thin Films","authors":"B. S. Munde, S. RavangaveL.SRavangaveL.","doi":"10.9790/4861-0903028589","DOIUrl":"https://doi.org/10.9790/4861-0903028589","url":null,"abstract":"Chemical bath deposition technique (CBD) was used for deposition of Cd1-xMnxs Thin Films. Initially bath parameters were optimized by physical observation of sustainable Deposition of CdS thin films. The deposited films have been characterized by using X-ray diferactometer, Scanning electron microscopy, EDAX and spectrophotometer. The film thickness was estimated using weight and difference method. Film thickness was found increased with increase in Mn concentration in CdS material. All the films show polycrystalline crystal structure. The observed diffraction patterns were well fitted with the standard JCPDS card data: 772306 of CdS and 76-2049 for MnS. Cd1-xMnxS thin films exhibit the hexagonal as well as cubic crystal structure. The micrograph shows that the films deposited cover the whole substrate with uniform surface morphology. The significant effect of Mn doping has been observed from SEM micrographs of the CdxMn1-xS thin film. Very small amount of Mn doping can show significant change in the microstructure of the SEM. The nanowire morphology was found changed into granular morphology. The absorption spectra show significant blue shifting for the composition x=0.8, having very low absorption. The optical transmittance was higher in the visible region (350 900 nm) and was found increased from 5 to 68 %. The optical band gap was found increased on Mn doping. The x=0.8 exhibit 3.58eV band gap. The maximum transmittance and higher band gap shows that Cd0.2Mn0.8S Composition can be used for solar cell applications.","PeriodicalId":14502,"journal":{"name":"IOSR Journal of Applied Physics","volume":"101 1","pages":"85-89"},"PeriodicalIF":0.0,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75812546","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1