Welcome to my personsal homepage!

به وبسایت شخصی روح الله توکلی خوش آمدید

persian version

**Teaching Courses taught Current research**Recent publications & Preprints Links

Rouhollah Tavakoli (PhD MSE Sept. 2009)

Associate Professor

Department of Materials Science and Engineering

Sharif University of Technology

P.O. Box: 11365-9466

P.C. : 1458889694

Tel: +98 21 6616 5209

Fax: +98 21 6600 5717

Email: rtavakoli at sharif.ir (also I use frequently Gmail id: rtav20 at gmail.com)

Field of activity: numerical simulation and optimal design in MSE, solidification and casting.

Teaching (fall 2019): ..

- Crystallography and X-Ray Diffraction (outline)

- Numerical Methods (outline)
- text: matlab primer (new version), ascher
- homeworks: homework1, homework2, ...

Courses taught at SUT (link): Advanced phase transformation and diffusion (g), Computational materials science (g), Simulation of solidification and casting processes (g), Ingot casting (g), Crystallography & X-ray diffraction (ug), Numerical simulation in MSE (ug), Numerical Methods (ug), Principles of solidification and casting (ug), Solidification and casting Lab (ug).

Current research:

- Structure/mechanical properties analysis of metallic glasses (simulation/experiment).
- Phase-field modeling of phase transformation in multicomponent systems.
- Optimal design of composites and FGMs by topology optimization.
- Optimal design of continuous casting process
- Perovskite-based solar cells, design, synthesis, fabrication

Recent publications (2014 -- Present):

- Synergistic Interface and Compositional Engineering of Inverted Perovskite Solar Cells Enable Highly Efficient and Stable Photovoltaic Device, Chemical Communications, accepted 2019.
- Oxygen Plasma-Induced p-type Doping Improves Performance and Stability of PbS Quantum Dot Solar Cells, ACS Applied Materials & Interfaces, accepted 2019.
- Highly Efficient and Stable Inverted Perovskite Solar Cells Using Down-Shifting Quantum Dots as a Light Management Layer and Moisture-Assisted Film Growth, J Mater Chem A, accepted 2019.
- F. Bodaghi, M. Movahedi, A.H. Kokabi, R Tavakoli, Effect of solid fraction, grain misorientation and grain boundary energy on solidification cracking in weld of Al-Cu aluminum alloys, Materials Research Express, inpress 2019.
- M. Tavakoli, R. Tavakoli, P Yadav, J Kong, A graphene/ZnO electron transfer layer together with perovskite passivation enables highly efficient and stable perovskite solar cells, J Mater Chem A 7 (679-686) 2019.
- M.T. Asadi, R. Tavakoli, H. Aashouri, Serrated flow during
inhomogeneous bending deformation of bulk metallic glasses: from
self-organized critical to chaotic dynamics, J Non-Cryst Solids 505 (62--71) 2019.

- M.M. Tavakoli, P. Yadav, D. Prochowicz, R. Tavakoli, M. Saliba, Multilayer
Evaporation of MAFAPbI3-xClx for the Fabrication of Efficient and
Large-Scale Device Perovskite Solar Cells, J Phys D, accepted 2019, invited paper.

- M.T. Asadi, R. Tavakoli, H. Aashouri, On the origin of intermediate temperature brittleness in La-based bulk metallic glasses Journal of Alloys and Compounds,
J Alloy Compd, 770 (535--539) 2019.

- M. Ghaemi, R. Tavakoli, A. Foroughi, Comparing short–range and medium–range ordering in Cu--Zr and Ni--Zr metallic glasses -- Correlation between structure and glass form ability, J Non-Cryst Solids 499 (227--236) 2018.
- S. Safaei, R. Tavakoli, M. J. Zadeh, Moelcular Dynamics Study of Two Dimensional Silicon Dioxides with In Plane Negative Poisson's Ratio, Comput Mater Sci 153 (258--267) 2018.
- M. Tavakoli, P Yadav , R Tavakoli, J Kong, Surface Engineering of TiO 2 ETL for Highly Efficient and Hysteresis-Less Planar Perovskite Solar Cell (21.4%) with Enhanced Open Circuit Voltage and Stability, Advanced Energy Materials, 8 (1800794) 2018.
- S. Mohammadyari, R. Tavakoli, Production and Characterization of SAC-XAl lead free nanocomposite solder via melt-spinning technique, Founding Research Journal 1 (171-180) 2018.
- M.T. Asadi, R. Tavakoli, H. Aashuri, Effect of temperature on the fracture surface morphology of Ti- and Zr-based bulk metallic glasses - exploring correlation between morphology and plasticity, J Mater Sci 53 (10372--10382) 2018.
- M. Jafary-zadeh, Z. Aiken, R. Tavakoli, Y. Zhang, On the controllability of phase formation in rapid solidification of high entropy alloys, J Alloy Compd 748 (679--686) 2018.
- A. Foroughi, R. Tavakoli, H. Aashuri, Medium range order evolution in pressurized sub-Tg annealing of Cu64Zr36 metallic glass, J Non-Cryst Solids 481 (132--137) 2018.
- R. Tavakoli, Thermal optimization of the continuous casting process using distributed parameter identification approach—controlling the curvature of solid-liquid interface, Int. J. Adv. Manufacturing Tech 94 (1101--1118) 2018.
- A. Foroughi, H. Aashuri, R.
Tavakoli, M. Stoica, D. Sopu, J. Eckert, Structural modification
through pressurized sub-Tg annealing of metallic glasses, J. Appl.
Phys. 122, 2017.

- M.T.
Asadi, R. Tavakoli, H. Aashuri, Effect of the strain rate on the
intermediate temperature brittleness in Zr-based bulk metallic glasses,
J Non-Cryst Solids 475 (172-178) 2017.

- S. Safaei, R. Tavakoli, On The Design of Graphene Oxide Nanosheets Membranes for Water Desalination, Desalination 422 (83--90) 2017.
- M. Tavakoli, A. Waleed, L. Gu, D. Zhang, R. Tavakoli, Non-Catalytic Vapor Growth Regime for
Organohalide Peroskvite Nanowire Using Anodic Aluminum Oxide Templates, Nanoscale 18 (5828--5834) 2017.

- M. Tavakoli, A. Simchi, R. Tavakoli, Z. Fan, Organic Halides and
Nanocone Plastic Structures Enhance the Energy Conversion Efficiency
and Self-Cleaning Ability of Colloidal Quantum Dot Photovoltaic
Devices, J. Phys. Chem. C 121 (9757–9765) 2017.

- M. Jafary-Zadeh, R. Tavakoli, J. Koh, Z. Aitken, Y. Zhang, Effect of chemical composition and affinity on the short- and medium-range order structures and mechanical properties of Zr-Ni-Al metallic glass, J Non-Cryst Solids 456 (68--75) 2017.
- R. Tavakoli, Smooth Modeling of Solidification Based on the Latent Heat Evolution Approach, Int. J. Adv. Manufacturing Tech 88 (2017), 3041–3052.
- G.P. Kumar, M. Jafary-Zadeh, R. Tavakoli, F. Cui, Feasibility of using bulk metallic glass for self-expandable stent applications, Journal of Biomedical Materials Research: Part B - Applied Biomaterials 105 (2017) 1874–-1882.
- M.
Jafary-Zadeh, R. Tavakoli, D.J. Srolovitz, Y. Zhang, Thermally
induced failure mechanism transition and its correlation with
short-range order evolution in metallic glasses, Extreme
Mechanics Letters 9 (215--225) 2016.

- R. Tavakoli, Optimal design of multiphase composites under elastodynamic loading, Comput Meth Appl Mech Eng, 300 (265--293) 2016.
- R. Tavakoli, Unconditionally energy stable time stepping scheme for Cahn-Morral equation: application to multi-component spinodal decomposition and optimal space tiling, J Comput Phys 304 (441--464) 2016.
- R. Tavakoli, On the coupled continuous knapsack problems: projection onto the volume constrained Gibbs N-simplex, Optimization Letters 10 (137--158) 2016.
- M. Tavakoli, R, Tavakoli, A. Waleed, U. Virk, Z. Fan, High efficiency and stable perovskite solar cell using ZnO/rGO QDs as an electron transfer layer, Adv Mater Int 3 (1500790) 2016.
- M. Tavakoli, R, Tavakoli, S. Hasanzadeh, M. Mirfasih,
Interface Engineering of Perovskite Solar Cell Using a Reduced-Graphene
Scaffold, J. Phys. Chem. C 120 (19531–19536) 2016.

- A. Foroughi, R. Tavakoli, H. Aashuri, Molecular Dynamics
Study of local structure evolution in Cu50-Zr50 Bulk Metallic Glass, J
Non-Cryst Solids 432 (334--341) 2016.

- S.Z.
Homayounfar, R. Tavakoli, R. Bagheri, Energy management through
topology optimization of composites microstructure using projected
gradient method, Struct Multidisc Optim 52 (1121--1133) 2015.

- R.
Tavakoli, Computationally efficient approach for the minimization of
volume constrained vector-valued Ginzburg-Landau energy functional, J
Comput Phys 295 (355–-378) 2015.

- R. Tavakoli, On the prediction of shrinkage defects by thermal criteria functions, Int. J. Adv. Manufacturing Tech 74 (569--579) 2014.
- R. Tavakoli, Multimaterial topology optimization by volume constrained Allen-Cahn system and regularized projected steepest descent method, Comput Meth Appl Mech Eng 276 (534--565) 2014.
- M.M. Tavakoli, R. Tavakoli, P. Davami, H. Aashuri, A quantitative approach to study solid state phase coarsening in solder alloys using combined phase-field modeling and experimental observation, J Comput Electron 13 (425--431) 2014.
- R. Tavakoli, S.M. Mohsenie, Alternating active-phase
algorithm for multimaterial topology optimization problems: a 115-line
MATLAB implementation, Struct Multidisc Optim 49 (621--642) 2014.

Former publications (2006--2014)

Links:

- XePersian (a
Latex package to do persian and bidirectional typesetting in Latex)

- PSTricks,
TikZ,
GnuPlot, Paraview (useful free plotting
tools)

Last modification: Sept 2019 by rt