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Perovskite Single Crystals: Synthesis, Properties, and Applications

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Journal of Electronic Science and Technology 2021年第2期19卷 119-143页

作者： Shan-Shan Rong m.bilal Faheem Yan-Bo Li Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of ChinaChengdu 610054

Perovskite single crystals have gained enormous attention in recent years due to their facile synthesis and excellent optoelectronic properties including the long carrier diffusion length,high carrier mobility,low trap density,and tunable absorption edge ranging from ultra-violet(UV)to near-infrared(NIR),which offer potential for applications in solar cells,photodetectors(PDs),lasers,*** this review,we summarized the synthesis,properties,and applications of organic-inorganic mixed and all-inorganic perovskite single crystals,particularly those through the solution synthesis *** towards the crystal growth and stability with future perspectives were also briefly described at the end of this paper.

关键词： Laser perovskite photodetector(PD) single crystal solar cell

Convective heat and mass transfer in mHD mixed convection flow of Jeffrey nanofluid over a radially stretching surface with thermal radiation

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Journal of Central South University 2015年第3期22卷 1114-1123页

作者： m.bilal ASHRAF T.HAYAT A.ALSAEDI S.A.SHEHZAD Department of mathematics Comsats Institute of Information Technology Department of mathematics Quaid-i-Azam University Nonlinear Analysis and Applied mathematics (NAAm) Research Group Department of MathematicsFaculty of Science King Abdulaziz University

mixed convection flow of magnetohydrodynamic(mHD) Jeffrey nanofluid over a radially stretching surface with radiative surface is studied. Radial sheet is considered to be convectively heated. Convective boundary conditions through heat and mass are employed. The governing boundary layer equations are transformed into ordinary differential equations. Convergent series solutions of the resulting problems are derived. Emphasis has been focused on studying the effects of mixed convection, thermal radiation, magnetic field and nanoparticles on the velocity, temperature and concentration fields. Numerical values of the physical parameters involved in the problem are computed for the local Nusselt and Sherwood numbers are computed.

关键词： Jeffrey nanofluid mixed convection flow radially stretching surface convective boundary conditions magnetic field

Convective heat and mass transfer effects in three-dimensional flow of maxwell fluid over a stretching surface with heat source

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Journal of Central South University 2015年第2期22卷 717-726页

作者： T.Hayat m.bilal Ashraf A.Alsaedi S.A.Shehzad Department of mathematics Quaid-i-Azam University 45320Islamabad 44000 Pakistan Nonlinear Analysis and Applied mathematics (NAAm) Research Group Department of MathematicsFaculty of Science King Abdulaziz University P.O.Box 80257 Jeddah 21589 Saudi Arabia

Heat and mass transfer effects in three-dimensional flow of maxwell fluid over a stretching surface were *** was performed in the presence of internal heat generation/absorption. Concentration and thermal buoyancy effects were accounted. Convective boundary conditions for heat and mass transfer analysis were explored. Series solutions of the resulting problem were developed. Effects of mixed convection, internal heat generation/absorption parameter and Biot numbers on the dimensionless velocity, temperature and concentration distributions were illustrated graphically. Numerical values of local Nusselt and Sherwood numbers were obtained and analyzed for all the physical parameters. It is found that both thermal and concentration boundary layer thicknesses are decreasing functions of stretching ratio. Variations of mixed convection parameter and concentration buoyancy parameter on the velocity profiles and associated boundary layer thicknesses are enhanced. Velocity profiles and temperature increase in the case of internal heat generation while they reduce for heat absorption. Heat transfer Biot number increases the thermal boundary layer thickness and temperature. Also concentration and its associated boundary layer are enhanced with an increase in mass transfer Biot number. The local Nusselt and Sherwood numbers have quite similar behaviors for increasing values of mixed convection parameter, concentration buoyancy parameter and Deborah number.

关键词： maxwell fluid mixed convection convective conditions three-dimensional flow internal heat generation/absorption

Effects of Variable Thermal Conductivity and Non-linear Thermal Radiation Past an Eyring Powell Nanofluid Flow with Chemical Reaction

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Communications in Theoretical Physics 2017年第6期67卷 723-731页

作者： m.Ramzan m.bilal Shamsa Kanwal Jae Dong Chung Department of Computer Science Bahria UniversityIslamabad Campus Department of mathematics Faculty of ComputingCapital University of Science and Technology Department of mathematical Sciences Fatima Jinnah Women University Department of mechanical Engineering Sejong University

Present analysis discusses the boundary layer flow of Eyring Powell nanofluid past a constantly moving surface under the influence of nonlinear thermal radiation. Heat and mass transfer mechanisms are examined under the physically suitable convective boundary condition. Effects of variable thermal conductivity and chemical reaction are also considered. Series solutions of all involved distributions using Homotopy Analysis method(HAm) are *** of dominating embedded flow parameters are discussed through graphical illustrations. It is observed that thermal radiation parameter shows increasing tendency in relation to temperature profile. However, chemical reaction parameter exhibits decreasing behavior versus concentration distribution.

关键词： Eyring Powell nanofluid nonlinear thermal radiation convective boundary condition variable thermal conductivity chemical reaction

mHD Stagnation Point Flow of Williamson Fluid over a Stretching Cylinder with Variable Thermal Conductivity and Homogeneous/Heterogeneous Reaction

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Communications in Theoretical Physics 2017年第6期67卷 688-696页

作者： m.bilal m.Sagheer S.Hussain Y.mehmood Department of mathematics Capital University of Science and Technology

The present study reveals the effect of homogeneous/hetereogeneous reaction on stagnation point flow of Williamson fluid in the presence of magnetohydrodynamics and heat generation/absorption coefficient over a stretching cylinder. Further the effects of variable thermal conductivity and thermal stratification are also considered. The governing partial differential equations are converted to ordinary differential equations with the help of similarity *** system of coupled non-linear ordinary differential equations is then solved by shooting technique. mATLAB shooting code is validated by comparison with the previously published work in limiting case. Results are further strengthened when the present results are compared with mATLAB built-in function bvp4c. Effects of prominent parameters are deliberated graphically for the velocity, temperature and concentration profiles. Skin-friction coefficient and Nusselt number for the different parameters are investigated with the help of tables.

关键词： stagnation point flow homogeneous/heterogeneous reaction Williamson fluid stretching cylinder variable thermal conductivity thermal stratification

Thermally Radiative Rotating magneto-Nanofluid Flow over an Exponential Sheet with Heat Generation and Viscous Dissipation:A Comparative Study

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Communications in Theoretical Physics 2018年第3期69卷 317-328页

作者： m.Sagheer m.bilal S.Hussain R.N.Ahmed Department of mathematics Capital University of Science and Technology

This article examines a mathematical model to analyze the rotating flow of three-dimensional water based nanofluid over a convectively heated exponentially stretching sheet in the presence of transverse magnetic field with additional effects of thermal radiation,Joule heating and viscous ***(Ag),copper(Cu),copper oxide(Cu O),aluminum oxide(Al_2O_3)and titanium dioxide(Ti O_2)have been taken under consideration as the nanoparticles and water(H_2O)as the base *** suitable similarity transformations,the governing partial differential equations(PDEs)of the modeled problem are transformed to the ordinary differential equations(ODEs).These ODEs are then solved numerically by applying the shooting *** the particular situation,the results are compared with the available *** effects of different nanoparticles on the temperature distribution are also discussed graphically and *** is witnessed that the skin friction coefficient is maximum for silver based ***,the velocity profile is found to diminish for the increasing values of the magnetic parameter.

关键词： magnetohydrodynamics nanofluid viscous dissipation thermal radiation rotating flow

Upshot of Chemical Species and Nonlinear Thermal Radiation on Oldroyd-B Nanofluid Flow Past a Bi-directional Stretched Surface with Heat Generation/Absorption in a Porous media

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Communications in Theoretical Physics 2018年第7期69卷 71-80页

作者： Dian-Chen Lu m.Ramzan m.bilal Jae Dong Chung Umer Farooq Department of mathematics Faculty of Science Jiangsu University Department of Computer Science Bahria University Islamabad Campus Department of mechanical Engineering Sejong University Department of mathematics Faculty of Computing Capital University of Science and Technology Department of mathematics COMSATS Institute of Information Technology

A three-dimensional mathematical model is developed to examine the flow of nonlinear thermal radiation Oldroyd-B nanofluid past a bidirectional linearly stretched surface in a porous medium. The flow is induced by temperature dependent thermal conductivity, chemical reaction and convective heat and mass conditions. Novel characteristics of Brownian motion and thermophoresis are accompanied by magnetohydrodynamic and heat generation/***-similar transformations are employed to convert the system of nonlinear partial differential equations to a system of ordinary differential equations with high nonlinearity and are solved by strong analytic technique named as Homotopy Analysis method(HAm). Effects of varied arising parameters on involved distributions are reflected through graphical illustrations. From this study, it is perceived that strong magnetic field hinders the fluid's motion and leads to rise in temperature that eventually lowers heat transfer rate from the surface. Further, decrease in heat transfer rate is also observed for enhanced values of thermal radiation parameter. To validate our results, a comparison with already published paper in limiting case is also given and results are found in excellent oncurrence; hence reliable results are being presented.

关键词： nonlinear thermal radiation heat generation/absorption chemical reaction convective heat andmass conditions porous media

A Numerical Investigation of 3D mHD Rotating Flow with Binary Chemical Reaction,Activation Energy and Non-Fourier Heat Flux

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Communications in Theoretical Physics 2018年第7期69卷 89-96页

In this investigation we analyze the rotating three-dimensional magnetohydrodynamic flow of maxwell fluid in attendance of binary chemical reaction with activation energy. Furthermore, effects of non-Fourier heat flux are taken into account. Formulation is done in the presence of heat and mass convective boundary conditions. Self-similar forms from boundary layer equations are obtained using apposite transformations. Numerical solution is obtained via built-in bvp-4c function in mATLAB for the system of differential equations. Effects of ensuing parameters on flow distributions are portrayed graphically. It is witnessed that increasing values of rotational parameter lowers the velocity profile and both Biot numbers have escalating effect on temperature and concentration distributions. A comparative study to a previously done investigation is also included to corroborate our results.

关键词： activation energy binary chemical reaction Cattaneo-Christov heat flux rotating frame

Darcy-Forchheimer Hybrid Nano Fluid Flow with mixed Convection Past an Inclined Cylinder

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Computers, materials & Continua 2021年第2期66卷 2025-2039页

作者： m.bilal Imran Khan Taza Gul Asifa Tassaddiq Wajdi Alghamdi Safyan mukhtar Poom Kumam Department of mathematics City University of Science and Information TechnologyPeshawar25000Pakistan Department of Basic Sciences and Humanities College of Computer and Information SciencesMajmaah UniversityAl-Majmaah11952Saudi Arabia Department of Information Technology Faculty of Computing and Information TechnologyKing Abdulaziz UniversityJeddah80261Saudi Arabia Basic Sciences Department Deanship of Preparatory YearKing Faisal UniversityAl Ahsa31982Saudi Arabia Center of Excellence in Theoretical and Computational Science(TaCS-CoE) SCL 802 Fixed Point LaboratoryScience Laboratory BuildingKing Mongkut’s University of Technology Thonburi(KMUTT)Bangkok10140Thailand

This article aims to investigate the Darcy Forchhemier mixed convection flow of the hybrid nanofluid through an inclined extending *** different nanoparticles such as carbon nanotubes(CNTs)and iron oxide Fe3O4 have been added to the base fluid in order to prepare a hybrid *** partial differential equations for momentum,energy and convective diffusion have been changed into dimensionless ordinary differential equations after using Von Karman *** analysis method(HAm),a powerful analytical approach has been used to find the solution to the given *** effects of the physical constraints on velocity,concentration and temperature profile have been drawn as well for discussion *** numerical outcomes have been carried out for the drag force,heat transfer rate and diffusion rate *** Biot number of heat and mass transfer affects the fluid temperature whereas the Forchhemier parameter and the inclination angle decrease the velocity of the fluid *** results show that hybrid nanofluid is the best source of enhancing heat transfer and can be used for cooling purposes as well.

关键词： mixed convection similarity transformation HAm hybrid nanofluid CNTs Darcy Forchhemier inclined cylinder