Professor (2011-Present)– Department of Electrical and Computer Engineering, The University of North Carolina at Charlotte, 9201 University City Blvd, Charlotte, NC 28223-0001
Assistant Director & Principal Research Engineer – Semiconductor Devices (Solar cells etc) – (2010 – 2/2011) University Center of Excellence for Photovoltaic Research and Education – Georgia Institute of Technology, Atlanta, GA 30332-0250
Advised graduate students, guided engineers and managed sponsored research, presented technical papers in conferences, reports preparation, proposal preparation and prepared articles for journal publication.
Assistant Director & Senior Research Engineer Semiconductor Devices – Solar cells, LED, Photo-detectors etc, (2004 – 6/2010), University Center of Excellence for Photovoltaic Research and Education – Georgia Institute of Technology, Atlanta, GA 30332-0250
III-V Nitride Semiconductor Device Engineer – LED, Photo detectors etc (2001-2004),GE Global Research Center, One Research Circle, Niskayuna, NY 12309.
Developed Electro-Optical models based on AIM-Spice for LED. Used ASAP (Advanced Systems Analytical Program) to model the light extraction from small and large die including LED arrays and lamps. Provide technical assistance to PV program including due diligence on PV companies to offer expert advice to GE. LED fabrication and characterization. Instructor – Edison Engineering Development Program – Developed and taught Electronic Materials being part of A Course.
Research Engineer II – Silicon Solar Cells (1997-2001) University Center for Photovoltaics Research and Education, School of Electrical and Computer Engineering, Georgia Institute of Technology, Atlanta, GA 30332-0250.
Development and fabrication of record high efficiency manufacturable multi-crystalline, Czochralski and float zoned silicon solar cells. In charge of quality control by monitoring and keeping record of all the run sheets for the center’s technologies. Revised all testing and characterization manuals and techniques and maintain standard. Provided training to new students and staff on manufacturable processing, Plasma enhanced chemical vapor deposition, screen-printing technology, testing and characterization. Extended material characterization using deep level transient spectroscopy, Fourier transform infrared spectroscopy, Light beam induced current, Electron beam induced current and Photoconductance decay for minority carrier lifetime measurement. Conduct collaborative scientific research with other engineers and scientist from other universities, Photovoltaic companies and other departments within Georgia Tech. One and two-dimensional computer modeling of silicon solar cells.
Postdoctoral Research Fellow (1995-1997) – Silicon Solar Cells Samsung Electronics, P. O. Box 111, Suwon 440-600, South Korea
Research and development of buried contact technology to achieve high efficiency. Set up a buried contact solar cell production line. Design and fabrication of a variety of buried contact cells including, double-sided buried contact, hybrid of buried contact and photolithography based cells, space cells, etc. Theoretical modeling of solar cell device-using PC-1D and DESSIS. Development of a new technique for depositing thin film polycrystalline silicon on glass at low temperature using Electron cyclotron resonance chemical vapor deposition.
Graduate Research Assistant (1990-1995) – Buried contact silicon solar cells Center for Photovoltaic Devices and Systems, The University of New South Wales, Australia
Technology transfer to Samsung Electronics of buried contact silicon solar cells – both single and double sided. Development and fabrication of simplified rear double-sided buried contact silicon solar cells. Continuous research into the cause of low fill factor for double-sided buried contact silicon solar cells.
Tutor – GE/RPI Albany – New York (2001-2003), Developed and taught Electronic Materials to graduate students
Teaching Assistant, (1990-1992), Physics and Electronics Departments, The University of New South Wales, Australia.
Supervised and marked first year Physics practical and Tutorials, marked Examinations etc. Tutored Advanced Physics of Semiconductor Devices and supervised Laboratory.
Lecturer in Physics (1988-1990), Physics Department, University of Port Harcourt, Nigeria
Taught courses such as Electronics, Solid State Physics, Modern Physics, Electronic Design & Systems. Supervision of both undergraduate and post-graduate theses; Co-ordination of first year Physics practical and general administration.
Assistant Lecturer in Physics (1987-1988), Physics Department, University of Port Harcourt, Nigeria.
Taught General Physics, Vibrations and Waves and Co-ordination of first year Physics practical and general administration.