Steering Committee Member

	Dr. Parameswar Hari
Professor of Physics and Engineering Physics, University of Tulsa	Group website
OKPVRI Director	Email: hari@utulsa.edu

Dr. Parameswar Hari is a professor in the Physics and Engineering Physics at the University of Tulsa. Dr. Hari is also the director of the Oklahoma photovoltaic research institute at the University of Tulsa. Dr. Hari conducts research on nanomaterials, especially on materials used in third generation photovoltaics. Dr. Hari obtained MS in Physics from Ohio University and Ph.D. in condensed matter physics from the University of Utah. Prior to joining the University of Tulsa, Dr. Hari obtained post- doctoral training at The National High Field Lab, Texas A&M University and Vanderbilt University. Dr. Hari is the author of over 60 publications in condensed matter physics.

Recent Publications

• Kyle Stoltz, Elena Echeverria, Amrit Kaphle, Aaron J. Austin, Parameswar Hari, Andrew J. Yost, David N. McIlroy, Mario F. Borunda, Optimization of the U parameter in CoO groupings in ZnO and surfaces: ADFT+U and UPS study, Computational Materials Science, Volume 198, 110700 (2021)(Impact Factor: 3.3)
• R. Rathnasekara and P. Hari, Impedance Spectroscopy of nanostructured ZnO morphologies, Journal of Materials Research, 36, pages 1937–1947 (2021) (Impact Factor : 3.03) (Paper appeared on the cover page of the Journal)
• Ganga R. Neupane, Amrit Kaphle, David N. Mcllroy, Elena Echeverria, Prasanna Sankaran, Parameswar Hari, A Comparative Study of Structural, Optical and Electrical Properties of Fe-ZnO Nanoparticles Synthesized by Precipitation and Microwave Method for Photovoltaic Applications, Journal of Energy and Power Technology, Volume 3, Issue 3, (2021) doi:10.21926/jept.2103035
• Wingert R, O’Hern H, Orosz M, Hari P, Roberts K, Otanicar T, “Spectral beam splitting retrofit for hybrid PV/T using existing parabolic trough power plants for enhanced power output,” Solar Energy, 202, (2020).
• Ganga R. Neupane, and Parameswar Hari, Role of Polyvinylpyrrolidone (PVP) on Controlling the Structural, Optical, and Electrical Properties of Vanadium Pentoxide (V2O5) Nanoparticles, Chemistry Select, Wiley VCH, 5, 11596– 11607 (2020) doi.org/10.1002/ slct.202002916 (Impact Factor : 1.505)
• Amrit Kaphle, Elena Echeverria, David N. Mcllroy, and Parameswar Hari, Enhancement in the Performance of Nanostructured CuO-ZnO Solar Cells by Band Alignment, RSC Advances, 10, 7839 – 7854 (2020) DOI: 10.1039/C9RA10771A (impact Factor 3.09) (selected among the important papers in RSC in the past 10 years)

Invited Book Chapter (peer-reviewed)

• P. Hari, A. Kaphle and G. Neupane, Doping of One Dimensional and Zero Dimensional Nanostructures, Dekker Encyclopedia of Nanotechnology, Invited Article (2018) E. Lyshevski (Editor.) DOI: 10.1081/E-ENN3-140000519; Dekker Encyclopedia of Nanoscience and Nanotechnology Copyright © 2018 by Taylor & Francis.
• P. Hari and A. Kaphle, Investigations on Cobalt Doped Nanostructured ZnO/p-Si Heterojunctions for Energy Conversion Devices, Nanomaterials and Nanotechnology, Chapter 4, p. 75- 96 One Central Press, UK (2016)
• Dictionary of Condensed Matter Physics, Terms in the Range A-F and M- R.Edited by Deepak Basu, CRC Press, (2000)
• G. A. Williams, Z. Saleh, and P. Hari, Nuclear Quadrupole Resonance as a Non-Destructive Testing Tool. Proceedings of the Conference on Quantitative Non-Destructive Evaluation, Plenum Publishing Corporation, Vol. 12 A, 679-683
• P. Hari, A. Kaphle and G. Neupane, Comparison of Magnetic Properties of Co-and Fe-Doped Nanostructured ZnO Media, Chapter 10: Nano Engineering, Quantum Sciences and Nanotechnologies (Francis and Taylor / CRC Press). Edited by E. Lyshevski, January 2020: www.crcpress.com

Recent Presentations

• Electrochemical properties of Ag-doped ZnO nanorods synthesized by chemical bath deposition method., R Rathnasekara, P Hari, G Neupane - 2021 – APS, American Physical Society Meeting on-line, R23. 00007Bulletin of the American Physical Society, March 15-19, 2021 , Virtual;
• Effect of defect densities of n/i interface and the absorber layer in a perovskite solar cell by Solar Cell Capacitance Simulator-1D (SCAPS-1D) ,Ganga Raj Neupane , R. Ratnasekara, Parameswar Hari, APS March Meeting 2021 ,Volume 66, Number 1Monday–Friday, March 15–19, 2021; Virtual;
• Improving the Efficiency of Silicon Solar Cells by Attaching Thin Films of Nanoparticles and Quantum Dots (Invited Talk) E-symposium E-SENSOL 2020 that focuses on advanced techniques for solar energy harvesting and storage application, July 8-10, 2020.
• Temperature coefficient of resistance (TCR) measurement on vanadium pentoxide (V2O5) nanoparticles, G. Neupane and P. Hari, APS March Meeting, March 4-6, Denver (2020) (Contributed Oral)
• Comparison of ZnO Nanoparticles Synthesized by Microwave-assisted and Precipitation Method, R. Rathnsekara and P. Hari, APS March Meeting, March 4-6, Denver (2020) (Contributed Oral)

Student Information

Current Graduate Students: 2 Rusiri Rathnsekhara (Ph.D.and M.S in Physics), Ganga Neupane (Ph.D in Physics)

Current Undergraduate Students: 2 Bryce Goswick (Engineering Physics), Grant Mayberry (Physics)