Education
Doctor of Philosophy, Electrical and Computer Engineering
University of Toronto, Canada (2013)
Supervisor: Prof. Nazir P. Kherani
Thesis title: ‘Facile Grown Native Oxide Based Passivation of Crystalline Silicon: A Novel Approach for Low-Temperature Synthesis of Silicon Photovoltaics’
Master of Science, Electrical and Computer Engineering
University of Alberta, Canada (2006)
Supervisor: Prof. Robert Fedosejevs
Thesis title: ‘Sub-micron Resolution 3D Structure Writing Using Two Photon Absorption Process’
Bachelor of Science, Electrical and Electronic Engineering
Bangladesh University of Engineering and Technology, Dhaka, Bangladesh (2002)
Supervisor: Prof. M. Kamrul Hassan
Thesis title: ‘Identification of Auto-regressive Signals in Colored Noise Using Damped Sinusoidal Model’
Highlights
Development of novel devices, architectures and materials
Invented novel low temperature passivation scheme using low temperature silicon oxide and PECVD silicon nitride layers.
Improved lab cell efficiency to 17% from 8% using novel passivation scheme.
Projected 20%+ cell efficiency for BACH cells with textured front surface.
Proposed a novel solar cell concept, Lateral Inherently Thin (LIT) amorphous-crystalline hetero-junction cell.
Cell efficiency of 13.4% has been demonstrated for proof of concept LIT cell.
Developed a novel approach to produce black silicon.
Process technology integration
Optimized PECVD SiNx deposition, etching of amorphous silicon and SiNx layer, metal lift-off, and texturization of silicon processes.
integrated material processing techniques for solar cells and FET devices fabrication.
Device characterization
Characterized solar cell performance including external quantum efficiency (EQE) measurements.
Used probe station for the fabricated MOSFET characterization.
Photonics, optical detection, optical engineering
Ultra-fast femtosecond laser lithography for high resolution features in photoresists.
Used optical detection techniques to characterize temporal and spatial properties of laser pulses.
Custom designed, fabricated and commissioned a computer automated optical system using LabView.
Material testing and characterization, materials synthesis
Characterized material properties using Spectroscopic Ellipsometer, Sinton Silicon Lifetime Testing Tool, µ-PCD, XPS, and SEM.
Film synthesis using plasma enhanced chemical vapour deposition, sputtering, e-beam evaporation, thermal furnaces; device synthesis using photolithography, shadow-masking, RIE and wet chemistry.
Effective communication and collaboration
Published several journal articles in reputed, high-impact journals.
Delivered conference presentations to audiences in Spain, Germany, Singapore and Canada.
Collaborated with scientists and engineers in industry and at University of Toronto and McMaster University .
Project management and coordination
Directly supervised seven undergraduate and graduate students on device processing and related projects.
Successfully completed ‘Project Management’ and ‘Quality Management’ courses at the Univ. of Toronto.
Hardware skills
Material synthesis
Oxford PlasmaLab 100 PECVD System
DC Saddle Field PECVD Deposition System
Karl Suss Mask Aligner MA 6 for Photolithography
e-beam Metal Deposition and sputtering System
Phantom Reactive Ion Etcher (Dry etching)
Thermal Oxidation Chamber
Material characterization
SOPRA Spectroscopic Ellipsometer
Sinton Silicon Lifetime Tester
Semilab’s µ-PCD lifetime tester
Atomic Force Microscope (AFM)
X-ray Photo-electron Spectroscopy (XPS)
Software skills
TCAD Simulation using Sentaurus
National Instrument's LabVIEW
Matlab®
C/C++
Latex
Visual Studio (C++)
FORTRAN
Adobe Photoshop/Illustrator
Microsoft Office
Visual Basic
Solidworks
PHP Programming