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John Yarbrough received his Ph.D. in Applied Physics from the Colorado School of Mines (CSM) in 2007 where his research activities primarily involved investigating the electronic and optical properties of advanced polycrystalline semiconductor materials systems and device structures. He spent most of his time at CSM developing and using novel characterization techniques to obtain a fundamental understanding of these advanced semiconductor materials.

During his time at CSM, Dr. Yarbrough was involved in studying the overall effects that grain boundaries have on the performance of thin-film polycrystalline photovoltaic devices. This research involved designing and building of a vacuum compatible near-field scanning optical microscope (NSOM) to optically and electrically characterize these advanced semiconductor materials. The NSOM was used to perform both near-field spatial and spectral photoluminescence and near-field spatial photocurrent measurements on a submicron level scale on both cadmium telluride (CdTe) and copper indium gallium diselenide (CIGS) thin-film polycrystalline photovoltaic devices.

Dr. Yarbrough's research interest is in the development and implementation of novel characterization techniques in the area of imaging and spectroscopy to obtain a better fundamental understanding of biological systems and the process of biomass conversion, on a nanometer/micron-level scale, which is used in the area of alternative and renewable energies. 

Education/Academic Qualification

PhD, Applied Physics, Colorado School of Mines

Master, Physics, The University of Texas at Arlington

Bachelor, Physics, The University of Texas at Arlington


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