European Physical Journal-applied Physics最新文献_第5页

Impact of conduction band non-parabolicity and dielectric mismatch on photoionization cross section of donor bound polaron in spherical GaN/InN core-shell nanoparticle 传导带非抛物性和介电失配对球形GaN/InN核壳纳米粒子中供体束缚极化子光离截面的影响

IF 1 4区物理与天体物理

European Physical Journal-applied Physics Pub Date : 2020-11-18 DOI: 10.1051/epjap/2020200233

A. Talbi, M. Haouari, K. Nouneh, E. Feddi, M. Addou

{"title":"Impact of conduction band non-parabolicity and dielectric mismatch on photoionization cross section of donor bound polaron in spherical GaN/InN core-shell nanoparticle","authors":"A. Talbi, M. Haouari, K. Nouneh, E. Feddi, M. Addou","doi":"10.1051/epjap/2020200233","DOIUrl":"https://doi.org/10.1051/epjap/2020200233","url":null,"abstract":"Understanding the behavior of single dopant in semiconductors is a challenge to attain a high control on optoelectronic devices. Based on the fact that the external perturbations have an important impact on properties of doped nanocrystals, we have studied the simultaneous effects of phonons and conduction band non-parabolicity combined to dielectric mismatch and donor position on the photoionization cross section of an off-center donor in spherical GaN/InN core-shell quantum dots. The calculations were carried out within the framework of the effective-mass approximation and the eigenvalues equation has been solved using the Ritz variational method. The examination of the photoionization cross section, corresponding to the first donor energy level and the non-parabolic conduction band optical transition, shows clearly that the existence of non-parabolicity band or dielectric environment causes a blue shift of resonance peaks while the existence of phonon red shift them with a non-neglected variations in their intensity. The donor position has also an important effect on peaks position and amplitude.","PeriodicalId":12228,"journal":{"name":"European Physical Journal-applied Physics","volume":"28 2 1","pages":""},"PeriodicalIF":1.0,"publicationDate":"2020-11-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78169675","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Nanosecond laser-induced breakdown assisted by femtosecond laser pre-ionization in air: the effect on spatial resolution and continuous radiation 空气中飞秒激光预电离辅助纳秒激光诱导击穿:对空间分辨率和连续辐射的影响

IF 1 4区物理与天体物理

European Physical Journal-applied Physics Pub Date : 2020-11-01 DOI: 10.1051/epjap/2020200258

Bo Li, Xiaofeng Li, Zhu Zhifeng, Q. Gao

引用次数: 1

Comparison of random field strengths in (1-x)SrTiO3-xBiFeO3 and (1-x)SrTiO3-xBaTiO3 relaxor ferroelectrics by means of acoustic emission 声发射法比较(1-x)SrTiO3-xBiFeO3和(1-x)SrTiO3-xBaTiO3弛豫铁电体随机场强

IF 1 4区物理与天体物理

European Physical Journal-applied Physics Pub Date : 2020-11-01 DOI: 10.1051/epjap/2020200075

E. Dul’kin, M. Roth

引用次数: 1

New approach to study HTS bulk behavior for a fully superconducting motor design 研究全超导电机高温超导体行为的新方法

IF 1 4区物理与天体物理

European Physical Journal-applied Physics Pub Date : 2020-11-01 DOI: 10.1051/epjap/2020200031

H. Bouchekhou, H. Allag, M. Mekidèche, J. Lévêque, L. Gueraiche

引用次数: 1

Effect of electrolyte solution and deposition methods on TiO2/CdS core–shell nanotube arrays for photoelectrocatalytic application 电解质溶液和沉积方法对TiO2/CdS核壳纳米管阵列光电催化性能的影响

IF 1 4区物理与天体物理

European Physical Journal-applied Physics Pub Date : 2020-11-01 DOI: 10.1051/EPJAP/2020200127

Selma M. H. Al-Jawad, N. Imran, M. R. Mohammad

{"title":"Effect of electrolyte solution and deposition methods on TiO2/CdS core–shell nanotube arrays for photoelectrocatalytic application","authors":"Selma M. H. Al-Jawad, N. Imran, M. R. Mohammad","doi":"10.1051/EPJAP/2020200127","DOIUrl":"https://doi.org/10.1051/EPJAP/2020200127","url":null,"abstract":"In this work, TiO2 nanostructure thin films were deposited by using anodization technique, while CdS thin films were deposited on TiO2 films by two methods chemical bath deposition (CBD) and successive ionic layer adsorption and reaction (SILAR). The structure of TiO2 /CdS films were investigated and analyzed by XRD, SEM, and AFM, but the optical properties were investigated by UV–visible spectroscopy, PL spectroscopy, and spectral response. XRD analysis of all deposited films has confirmed the formation of two phases one is tetragonal phase (anatase, and rutile) for TiO2 , and second hexagonal phase which belong to CdS layer. SEM images of TiO2 nanotubes arrays (NTAs)/CdS showed the TiO2 NTs walls become decorated with aggregates of fine CdS nanoparticles that partly penetrate into the TiO2 NTAs pores. AFM measurements displayed increase in the surface roughness compared with TiO2 films. PL measurement results of TiO2 /CdS core–shell show two peaks, one is located at UV-region pointed to energy band gap for TiO2 nano films, and second one is located at visible region pointing to recombination of photogenerated electron–hole pairs within CdS layers. Spectral response measurements showed photocurrent peaks for all TiO2 /CdS films deposited with different electrolyte solution have red-shift to visible region. When illuminated with a UV–Vis light source, the TiO2 /CdS core–shell films displayed high response. A higher response to UV–Vis light was attained with the use of TiO2 NTAs/CdS films prepared by anodization /CBD. This approach offers a technique for fabricating photoelectrodes.","PeriodicalId":12228,"journal":{"name":"European Physical Journal-applied Physics","volume":"74 1","pages":"20102"},"PeriodicalIF":1.0,"publicationDate":"2020-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77208580","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 3

Plasmon-assisted interaction of Si with light, for cancer hyperthermia and electromagnetic energy harvest 等离子体辅助硅与光的相互作用，用于癌症热疗和电磁能量收集

IF 1 4区物理与天体物理

European Physical Journal-applied Physics Pub Date : 2020-11-01 DOI: 10.1051/epjap/2020200071

B. Mousavi, Morteza Rezaei Talarposhti, F. Karbassian, A. Mousavi

{"title":"Plasmon-assisted interaction of Si with light, for cancer hyperthermia and electromagnetic energy harvest","authors":"B. Mousavi, Morteza Rezaei Talarposhti, F. Karbassian, A. Mousavi","doi":"10.1051/epjap/2020200071","DOIUrl":"https://doi.org/10.1051/epjap/2020200071","url":null,"abstract":"Metal-assisted chemical etching (MACE) is applied for fabrication of silicon nanowires (SiNWs). We have shown the effect of amorphous sheath of SiNWs by treating the nanowires with SF6 and the resulting reduction of absorption bandwidth, i.e. making SiNWs semi-transparent in near-infrared (IR). For the first time, by treating the fabricated SiNWs with copper containing HF∕H2O2∕H2O solution, we have generated crystalline nanowires with broader light absorption spectrum, up to λ = 1 μm. Both the absorption and photo-luminescence (PL) of the SiNWs are observed from visible to IR wavelengths. It is found that the SiNWs have PL at visible and near Infrared wavelengths, which may infer presence of mechanisms such as forbidden gap transitions other can involvement of plasmonic resonances. Non-radiative recombination of excitons is one of the reasons behind absorption of SiNWs. Also, on the dielectric metal interface, the absorption mechanism can be due to plasmonic dissipation or plasmon-assisted generation of excitons in the indirect band-gap material. Comparison between nanowires with and without metallic nanoparticles has revealed the effect of nanoparticles on absorption enhancement. The broader near IR absorption, paves the way for applications like hyperthermia of cancer while the optical transition in near IR also facilitates harvesting electromagnetic energy at a broad spectrum from visible to IR.","PeriodicalId":12228,"journal":{"name":"European Physical Journal-applied Physics","volume":"44 1","pages":"20101"},"PeriodicalIF":1.0,"publicationDate":"2020-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74725955","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Superlensing property of 2-D glass photonic crystal 二维玻璃光子晶体的超透镜特性

IF 1 4区物理与天体物理

European Physical Journal-applied Physics Pub Date : 2020-11-01 DOI: 10.1051/EPJAP/2020200237

R. Ghosh, R. Chakraborty

引用次数: 0

Thermohydraulic characteristics and entropy analysis of a novel clockwise and anti-clockwise twisted sinusoidal wavy micro-channel under pulsating inlet condition 一种新型顺、逆时针扭曲正弦波微通道在脉动进口条件下的热液特性及熵分析

IF 1 4区物理与天体物理

European Physical Journal-applied Physics Pub Date : 2020-11-01 DOI: 10.1051/epjap/2020200176

S. Bhattacharyya, S. Das, H. Chattopadhyay

{"title":"Thermohydraulic characteristics and entropy analysis of a novel clockwise and anti-clockwise twisted sinusoidal wavy micro-channel under pulsating inlet condition","authors":"S. Bhattacharyya, S. Das, H. Chattopadhyay","doi":"10.1051/epjap/2020200176","DOIUrl":"https://doi.org/10.1051/epjap/2020200176","url":null,"abstract":"Heat transfer performance of microchannel are becoming an important area of research with the current fast growing scenario of high speed computing and miniaturized electronic devices. These devices pile up large amount of heat accompanied by smaller surface area to release it. The current work examines unsteady, laminar flow heat transfer inside a novel twisted sinusoidal wavy microchannel. The channel with square cross section is wavy in nature as well as twisted. The first half portion of the channel is twisted clockwise, whereas the twist in the remaining part is having counterclockwise twist. The novel geometry promotes mixing of fluid layers leading to transport augmentation. The inlet pulsation follows sinusoidal pattern in time. The thermal performance parameter of the proposed novel geometry was assessed within a Reynolds number range of 1–100. Both the pulsation amplitude and Strouhal number are varied during the course of this study. To solve the governing equations, a finite volume based method was utilized. The Nusselt number data shows significant enhancement for the sinusoidal inlet velocity as compared to that of the steady case, i.e. without inlet flow pulsation. The performance enhancement criterion combining heat transfer and pressure drop shows significant improvement over steady flow case as well as for one-way twisted tube. Entropy generation, which is the measure of dissipated energy, is also reported in the present work.","PeriodicalId":12228,"journal":{"name":"European Physical Journal-applied Physics","volume":"122 1","pages":"20903"},"PeriodicalIF":1.0,"publicationDate":"2020-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74656336","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 8

Magnetization reduction by varying normal field in stacks of composite superconductors in an electrical motor 通过改变电机中复合超导体堆的法向场来降低磁化强度

IF 1 4区物理与天体物理

European Physical Journal-applied Physics Pub Date : 2020-11-01 DOI: 10.1051/epjap/2020200034

A. Smara, T. Reis, V. Climente-Alarcón, B. Glowacki

引用次数: 0

Enhancement of the performance of CdS/CdTe heterojunction solar cell using TiO2/ZnO bi-layer ARC and V2O5 BSF layers: A simulation approach 利用TiO2/ZnO双层ARC和V2O5 BSF层增强CdS/CdTe异质结太阳能电池的性能:模拟方法

IF 1 4区物理与天体物理

European Physical Journal-applied Physics Pub Date : 2020-11-01 DOI: 10.1051/epjap/2020200213

A. Kuddus, Md. Ferdous Rahman, J. Hossain, A. Ismail

{"title":"Enhancement of the performance of CdS/CdTe heterojunction solar cell using TiO2/ZnO bi-layer ARC and V2O5 BSF layers: A simulation approach","authors":"A. Kuddus, Md. Ferdous Rahman, J. Hossain, A. Ismail","doi":"10.1051/epjap/2020200213","DOIUrl":"https://doi.org/10.1051/epjap/2020200213","url":null,"abstract":"This article presents the role of Bi-layer anti-reflection coating (ARC) of TiO2 /ZnO and back surface field (BSF) of V2 O5 for improving the photovoltaic performance of Cadmium Sulfide (CdS) and Cadmium Telluride (CdTe) based heterojunction solar cells (HJSCs). The simulation was performed at different concentrations, thickness, defect densities of each active materials and working temperatures to optimize the most excellent structure and working conditions for achieving the highest cell performance using obtained optical and electrical parameters value from the experimental investigation on spin-coated CdS, CdTe, ZnO, TiO2 and V2 O5 thin films deposited on the glass substrate. The simulation results reveal that the designed CdS/CdTe based heterojunction cell offers the highest efficiency, η of ∼25% with an enhanced open-circuit voltage, V oc of 0.811 V, short circuit current density, J sc of 38.51 mA cm−2 , fill factor, FF of 80% with bi-layer ARC and BSF. Moreover, it appears that the TiO2 /ZnO bi-layer ARC, as well as ETL and V2 O5 as BSF, could be highly promising materials of choice for CdS/CdTe based heterojunction solar cell.","PeriodicalId":12228,"journal":{"name":"European Physical Journal-applied Physics","volume":"41 1","pages":"20901"},"PeriodicalIF":1.0,"publicationDate":"2020-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79666172","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"物理与天体物理","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 11