Journal of Nano- and Electronic Physics最新文献_第2页

First Principle Study and Optimal Doping for High Thermoelectric Performance of TaXSn Materials (X = Co, Ir and Rh) TaXSn材料(X = Co, Ir和Rh)高热电性能第一性原理研究及最佳掺杂

Journal of Nano- and Electronic Physics Pub Date : 2021-01-01 DOI: 10.21272/JNEP.13(1).01011

A. Khaldi, Y. Benallou, M. Zemouli, K. Amara, M. E. Keurti

{"title":"First Principle Study and Optimal Doping for High Thermoelectric Performance of TaXSn Materials (X = Co, Ir and Rh)","authors":"A. Khaldi, Y. Benallou, M. Zemouli, K. Amara, M. E. Keurti","doi":"10.21272/JNEP.13(1).01011","DOIUrl":"https://doi.org/10.21272/JNEP.13(1).01011","url":null,"abstract":"In this paper, the full potential linearized augmented plane wave method implemented in the WIEN2K code with first principles-based density functional theory are used to investigate the structural, elastic, electronic and thermoelectric properties of TaCoSn, TaIrSn and TaRhSn. The structural and elastic constants are calculated using the generalized gradient potential developed by Perdew-Burke-Ernzerhof (GGA-PBEsol). The electronic structures are performed by means of GGA-PBEsol and improved by TranBlaha modified Becke-Johnson (TB-mBJ) potential. Our results show that the studied compounds are semiconductors with indirect gaps. On the other hand, we investigated the thermoelectric properties at different temperatures with respect to the chemical potential. The results show that the thermopower factors are more important for p-type doping than those for n-type doping and the maximum value of these factors indicates the optimal hole-doping level which gives rise to high thermoelectric performances of these materials. Finally, we note that the best thermopower values are found for the TaRhSn compound with optimal doping levels of (75.76, 175.60 and 238.92)  1014 W cm – 1 K – 2 s – 1 at temperatures of 300, 600, and 900 K, respectively.","PeriodicalId":16514,"journal":{"name":"Journal of Nano- and Electronic Physics","volume":"25 1","pages":"01011-1-01011-7"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76729950","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

Photocatalytic Properties of Sn-doped TiO2 sn掺杂TiO2的光催化性能

Journal of Nano- and Electronic Physics Pub Date : 2021-01-01 DOI: 10.21272/JNEP.13(1).01001

I. Myronyuk, V. Kotsyubynsky, V. Boychuk, I. Mykytyn, V. Gun'ko

{"title":"Photocatalytic Properties of Sn-doped TiO2","authors":"I. Myronyuk, V. Kotsyubynsky, V. Boychuk, I. Mykytyn, V. Gun'ko","doi":"10.21272/JNEP.13(1).01001","DOIUrl":"https://doi.org/10.21272/JNEP.13(1).01001","url":null,"abstract":"The synthesis of Sn-doped titania nanoparticles (Sn content of 0, 3, 6, and 12 at. %) was carried out using solgel chemical route based on the common acid hydrolysis of titanium and tin tetrachlorides. Phase composition, morphology, particle size, pore size distribution and photocatalytic performance of obtained materials were systematically studied by various analytical techniques (XRD, HR-TEM, low-temperature nitrogen adsorption porosimetry, UV-Vis spectroscopy). An increase in the Sn dopant concentration causes a gradual decrease in the relative content of the anatase phase from 100 mol. % for undoped titania to about 3 mol. % for material with maximal doping concentration. Materials with a Sn atomic content of 3 and 6 at. % have the maximum values of the specific surface area (about 280-290 m2/g) that corresponds to the smallest (approximately 2.5 nm) anatase crystallite. The photocatalytic activity of the synthesized Sn-doped TiO2 nanoparticles was analyzed by the method of methylene blue dye photodegradation in an aqueous solution under UV irradiation. The highest reaction rate constant and maximal methylene blue dye adsorption capacity were obtained for 3 at. % Sn-doped titania with the mixed anatase/rutile composition. The indirect optical transitions are characteristic for all synthesized materials. A decrease in the bandgap energy values with increasing Sn content from 3.21 eV for pure anatase to 2.82 eV for titania doped with 12 at. % of the Sn was observed. The growth in photocatalytic activity for the mixed-phase sample can be considered as a result of the increasing number of surface active centers due to the anatase-rutile phase transition.","PeriodicalId":16514,"journal":{"name":"Journal of Nano- and Electronic Physics","volume":"16 1","pages":"01001-1-01001-5"},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88456409","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

Environment-Friendly Synthesis of Undoped and Cu doped ZnO Nanoparticles and Study of their Optical Absorption Properties towards Biological Applications 未掺杂和Cu掺杂ZnO纳米粒子的环境友好合成及其光吸收性能在生物应用中的研究

Journal of Nano- and Electronic Physics Pub Date : 2021-01-01 DOI: 10.21272/JNEP.13(1).01006

P. Samanta, T. Kamilya

{"title":"Environment-Friendly Synthesis of Undoped and Cu doped ZnO Nanoparticles and Study of their Optical Absorption Properties towards Biological Applications","authors":"P. Samanta, T. Kamilya","doi":"10.21272/JNEP.13(1).01006","DOIUrl":"https://doi.org/10.21272/JNEP.13(1).01006","url":null,"abstract":"Wet chemical method is a simple and cost-effective way to synthesize nanoparticles of high yield and mass production compared to other conventional methods. Besides, it does not require the maintenance of rigorous experimental conditions like high temperature, low pressure or flow of carrier gases. We have followed a simple wet chemical method to synthesize pure and Cu doped ZnO nanoparticles. Absorption spectroscopic study yields the absorption behavior of a material over a wide range of the electromagnetic spectrum. Absorption study of the synthesized undoped ZnO and Cu/ZnO reveals that doping with Cu decreases the absorption coefficient. It clearly indicates that the scattering of photons by phonons reduces due to Cu doping. The Urbach energy is an important parameter to understand the degree of disorder of phonon states in a material. It also enables us to study the dependence of the absorption coefficient on the wave-length of incident photons of energies lower than the band gap energy. For pure ZnO, the Urbach energy was calculated to be 0.511 eV and decreased to 0.483 eV upon doping with Cu in ZnO. The extinction coefficient was also calculated to understand the optical absorption process in the material.","PeriodicalId":16514,"journal":{"name":"Journal of Nano- and Electronic Physics","volume":"62 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88845112","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

In-situ Synthesis of Mixed Vanadium (IV and V) Oxides/Reduced Graphene Oxide Using Centella asiatica Extract 积雪草提取物原位合成混合钒氧化物/还原氧化石墨烯

Journal of Nano- and Electronic Physics Pub Date : 2021-01-01 DOI: 10.21272/JNEP.13(1).01031

S. Rai, R. Bhujel, Amrita Gupta, B. Swain, J. Biswas

引用次数: 1

Theoretical Study of Photo-Luminescence Emission Using the Line Shape Function for Semiconductor Quantum Dots 利用半导体量子点线形函数的光致发光理论研究

Journal of Nano- and Electronic Physics Pub Date : 2021-01-01 DOI: 10.21272/JNEP.13(1).01024

P. H. Krishna, D. Jagwani, M. Ramrakhiani

引用次数: 1

Structural, Elastic and Thermodynamic Properties of ScP Compound: DFT Study ScP化合物的结构、弹性和热力学性质:DFT研究

Journal of Nano- and Electronic Physics Pub Date : 2021-01-01 DOI: 10.21272/JNEP.13(1).01008

A. Benamrani, S. Daoud, P. K. Saini

引用次数: 6

Photon Flux Density in the Diffraction Pattern During Scattering of H-polarized Photons by the Infinite Grating of Metallic Strips 金属条无限光栅散射h偏振光子时衍射图中的光子通量密度

Journal of Nano- and Electronic Physics Pub Date : 2021-01-01 DOI: 10.21272/JNEP.13(1).01002

A. V. Bezougly, O. Petchenko, G. Petchenko

引用次数: 0

Synthesis and Characterization of ZnO Thin Film for Modeling the Effect of Its Defects on ZnO/Cu2O Solar Cell EQE ZnO薄膜的合成与表征及其缺陷对ZnO/Cu2O太阳能电池EQE的影响

Journal of Nano- and Electronic Physics Pub Date : 2021-01-01 DOI: 10.21272/JNEP.13(1).01009

Slimane Chala, R. Boumaraf, A. Bouhdjar, M. Bdirina, M. Labed, T. E. Taouririt, M. Elbar, N. Sengouga, F. Yakuphanoglu, S. Rahmane, Y. Naoui, Y. Benbouzid

引用次数: 5

Influence of Mn2+ Magnetic Ions on the Properties of Cd1 – xMnxS Thin Films Synthesized by Chemical Bath Deposition Mn2+磁性离子对化学镀液法制备Cd1 - xMnxS薄膜性能的影响

Journal of Nano- and Electronic Physics Pub Date : 2021-01-01 DOI: 10.21272/JNEP.13(1).01004

A. Mali, A. Gaikwad, S. Borse, R. R. Ahire

{"title":"Influence of Mn2+ Magnetic Ions on the Properties of Cd1 – xMnxS Thin Films Synthesized by Chemical Bath Deposition","authors":"A. Mali, A. Gaikwad, S. Borse, R. R. Ahire","doi":"10.21272/JNEP.13(1).01004","DOIUrl":"https://doi.org/10.21272/JNEP.13(1).01004","url":null,"abstract":"II-VI semiconductor based ternary CdMnS compound material has received more attention due to its wide area of applications in semiconductor technology. Cd 1 – x Mn x S ( x  0, 0.2, 0.4, 0.6, 0.8 and 1.0) thin films were successfully prepared by chemical bath deposition technique on non-conducting glass substrates. Thin films were deposited at a bath temperature of 80  C and pH  11 by using the chemical bath reaction of cadmium chloride (CdCl 2 ) and manganese chloride (MnCl 2 ) with thiourea (NH 4 ) 2 S in an aqueous solution. Further, the prepared samples were characterized by UV-visible spectroscopy, photoluminescence, XRD, SEM and EDAX to study the optical, structural, surface, and chemical properties. Effect of Mn 2+ ions on the film thickness of Cd 1 – x Mn x S films was investigated using weight difference technique. The film thickness of Cd 1 – x Mn x S films decreases as Mn 2+ ions increase in the bath solution. The polycrystalline nature with hexagonal and cubic structures of the as-deposited films was confirmed by XRD. The band gap value of the deposited films was observed to increase with increasing Mn 2+ ion concentration, this might be ascribed to the fact that Cd atom was substituted by Mn atom in the CdS structure. EDAX analysis confirmed the deposition of Cd, Mn and S elements in the films. Photoluminescence spectra of Cd 1 – x Mn x S with different values of the composition parameter x exhibited two emission peaks with different intensities. The measurement of the electrical resistivity of Cd 1 – x Mn x S films was performed at room temperature using two probe methods. The variation in electrical resistivity values with compositional parameters was discussed based on deposition parameters. The investigated polycrystalline Cd 1 – x Mn x S thin films show promising technological applications in semiconductor industry.","PeriodicalId":16514,"journal":{"name":"Journal of Nano- and Electronic Physics","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89000791","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

Simulation of Parameters of Coaxial Solar Cells Based on Si and InP Nanowires 基于Si和InP纳米线的同轴太阳能电池参数仿真

Journal of Nano- and Electronic Physics Pub Date : 2021-01-01 DOI: 10.21272/JNEP.13(1).01012

І. P. Buryk, L. Odnodvorets, Ya.V. Khyzhnya

引用次数: 0