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Linderman Library with students walking
Michael Stavola portrait

Michael Stavola

Professor

610.758.3946
mjsa@lehigh.edu
Sherman Fairchild 211
Education:

Ph.D. in Physics (with D.L. Dexter), University of Rochester, May, 1980

B.S. in Physics and Engineering, Trinity College, May, 1975

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Recent Ph.D. Graduates and Dissertations

Amanda Portoff (2023)

Andrew Venzie (2024)

Ying Qin, dissertation title, Hydrogen centers in semiconducting oxides In2O3 and Ga2O3, Lehigh University (2018).

Philip Weiser, dissertation title, Studies of hydrogen defects and free-carrier absorption in transparent conducting oxides, Lehigh University (2017).

Weikai Yin, dissertation title: Hydrogen centers and the conductivity of In2O3 single crystals studied by FTIR spectroscopy, Lehigh University (2015).  The vibration properties and microscopic structures of hydrogen centers responsible for unintentional n-type conductivity of In2O3 have been determined for single crystal specimens by vibrational spectroscopy.

Figen Bekisli, dissertation title: Hydrogen in the semiconducting oxides SnO2 and TiO2 studied by FTIR spectroscopy, Lehigh University (2013). Hydrogen in TiO2 that is slightly reduced gives rise to a neutral OH center with an extra electron.  Vibrational spectroscopy and theory find that this extra electron becomes trapped at a nearby Ti site and acts as a small polaron rather than as an effective-mass-like free carrier.

Haoxiang Zhang, dissertation title: Light-element impurities in multi-crystalline Si, Lehigh University (2013).  The microscopic structures and electrical properties of defects containing nitrogen and oxygen impurities have been determined for the multi-crystalline Si materials used for the fabrication on solar cells.

Lanlin Wen, dissertation title: Experimental study of the H-N-H centers in dilute III-N-V alloys by low-temperature vibrational spectroscopy and uniaxial-stress methods, Lehigh University (2010).  The introduction of hydrogen into dilute III-N-V alloys produces large shifts in the band gap of the host crystal.  The structure and microscopic properties of the H-N-H complex that is responsible for this novel effect are determined by vibrational spectroscopy in conjunction with applied uniaxial stress.

Chao Peng, dissertation title: Hydrogen in semiconductors studied by vibrational spectroscopy, Lehigh University (2010).  The rate of the ortho-para transition for the interstitial H2 molecule in Si has been investigated at room temperature and at 77K by infrared absorption spectroscopy.

Suppawan Kleekajai, dissertation title: N-H2 complexes in dilute III-N-V semiconductors and hydrogenation methods used to fabricate solar cells (2007).  The vibrational properties of N-H2 complexes in GaAsN:H and GaPN:H that shift the band gaps of these dilute alloys have been compared and contrasted.   

Gang Shi, dissertation title: Physics of H in ZnO and H2 in Si from vibrational spectroscopy, Lehigh University (2006).  Hydrogen defects responsible for the n-type conductivity of ZnO were investigated by vibrational spectroscopy.  The H2 molecule in ZnO was found to be a surprising reservoir for hydrogen in ZnO that can liberate hydrogen shallow donor centers upon annealing.

Additional Ph.D advisees

Fan Jiang (2003), E Chen (2002), Marcie Weinstein (2002), Jing Zhou (2000), Michael Evans (1998), Stephen Uftring (1998), Jie-Fei Zheng (1996), Ying Cheng (1994), Ioly Veloarisoa (1992), David Kozuch (1992)