Michelle Vaisman

Michelle Vaisman's picture
PhD Student
EE: Electrical Engineering
Year: 
4
Bio: 

As a fourth year Electrical Engineering PhD candidate, I’m highly interested in contributing to the field of alternative energy where I may make a lasting impact on our world. I honed my interest in solar energy in particular during my three summer undergraduate research programs at Caltech, Cornell, and Harvard as well as during my three-year long undergraduate research at UC Berkeley. After receiving my BS in Chemistry and BA in Applied Math from UC Berkeley, I joined Yale’s PhD program, where I have since earned both an MS and MPhil in Electrical Engineering.

Research: 

During my undergrad, I investigated a number of fields including environmental chemistry, organic chemistry, materials science, surface science, and solar energy. In my graduate studies, I decided to hone in on solar cells, working to improve efficiency and lower cost. As part of my NASA Fellowship, I aim to integrate high-efficiency III-V onto low-cost Si for multijunction devices through both metamorphic and selective-area growth pathways for both terrestrial and space applications. I have grown cells by both molecular beam epitaxy and metal-organic vapor phase epitaxy and fabricated and characterized my own devices using cleanroom fabrication techniques and a wide variety of characterization tools including e-beam/thermal metal deposition, photolithography, wet/dry chemical etching, electron microscopy, IV testing, photoluminescence, hall measurements, nomarski microscopy, quantum efficiency and reflectance measurements, and irradiation testing. I am proficient in data anlysis using software such as Microsoft Office, Matlab, Igor, Origin, and ImageJ. As a result of my research at Yale, I set a record efficiency for metamorphic 1J GaAsP/GaP/Si solar cells. I have presented and published my research findings in numerous journals and conference, helping hone my oral and written communication skills.

Publications: 

Publications

  1. M. Vaisman, et al. “GaAsP solar cells on GaP/Si with low threading dislcoation density.” Applied Physics Letters 109, 032107 (2016).
  2. M. Vaisman, et al. “Direct-gap 2.1-2.2 eV AlInP solar cells on GaInAs/GaAs metamorphic buffers.” Journal of Photovoltaics 6 (2), 571 (2016).
  3. M. Vaisman, et al. “Effects of growth temperature and device structure on GaP solar cells grown by molecular beam epitaxy.” Applied Physics Letters 106, 063903 (2015).
  4. X. Li, B. Deng, X. Wang, S. Chen, M. Vaisman, et al., “Synthesis of thin-film black phosphorus on a flexible substrate.” 2D Materials 2 (3), 031002 (2015).
  5. T. Goh, J. S. Huang, B. Bartolome, M. Y Sfeir, M. Vaisman, et al. “Panchromatic polymer-polymer ternary solar cells enhanced by Forster resonance energy transfer and solvent vapor annealing.” Journal of Materials Chemistry A 3, 18611 (2015).
  6. S. Tomasulo, K. Nay Yaung, J. Faucher, M. Vaisman, M. L. Lee. “Metamorphic 2.1-2.2 eV InGaP solar cells on GaP substrates.” Applied Physics Letters 104, 173903 (2014).

Presentations

  1. M. Vaisman, et al. “Record-Efficiency GaAsP Solar Cells Grown by MBE on GaP/Si.” North American Molecular Beam Epitaxy Conference (2016). (Oral
  2. M. Vaisman, et al. “GaAsP/GaP/Si Single-Junction Solar Cells for III-V/Si Tandem Devices.” Photovoltaics Specialists Conference (2016). (Oral*Finalist in Best Student Paper Award Competition
  3. M. Vaisman, et al. “Direct-gap 2.1-2.2 eV AlInP solar cells on GaInAs/GaAs metamorphic buffers.” Photovoltaic Specialists Conference (2015). (Oral) *Finalist in Best Student Paper Award Competition; invited to submit to Journal of Photovoltaics
  4. M. Vaisman, et al. “GaP solar cells grown by molecular beam epitaxy.” Electronic Materials Conference (2015). (Oral)
  5. M. Vaisman, et al. “Preparation of black phosphorus thin films for optoelectronics and electronics.” Center for Research on Interface Structures and Phenomena Open House (2014). (Poster)
  6. S. Tomasulo, K. Nay Yaung, J. Simon, M. Vaisman, M. L. Lee. “Wide-bandgap InGaP solar cells grown by MBE for 4-6 junction devices.” International Conference on Molecular Beam Epitaxy, Flagstaff, Arizona (2014). (Presented by S. Tomasulo)
  7. M. Vaisman, et al. “Conductance properties of single atomic layer exfoliated graphene near nanohole edges.” Leadership Alliance National Symposium, Hartford, Connecticut (2012). (Poster)
  8. M. Vaisman, et al. “Air effects on lead sulfide quantum dot solar cells.” Cornell Center for Materials Research REU Seminar Day, Ithaca, New York (2011). (Oral)
  9. M. Vaisman, J. D. Roberts. “Conformational analysis of the succinic dianion: determining the effects of water on gauche preferences.” Caltech Amgen Scholars/SURF Seminar Day, Pasadena, California (2010). (Oral)