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RENEWABLE ENERGY AND APPLIED PHOTONICS
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Active Research Projects:

Materials Research

  • Phonon scattering reduction in infrared materials
  • Auger recombination reduction in infrared materials
  • Epitaxy of thallium and bismuth based small bandgap semiconductors and semimetals
  • Effects of surfactants and interfactants on III-V epitaxial crystal growth
  • SiGeSn materials system
  • Heterogeneous integration of group-IV  (C, Si, Ge, and Sn) with III-V materials
  • Earth-abundant simultaneous transparent conducting oxide and anti-reflective coating materials
  • Transparent semiconductors for the mid to far infrared

Photovoltaics (PVs)

  • Monolithic multi-lattice multijunction ultra-efficient concentrating PV solar cells
  • Novel small band-gap sub-cell materials for multijunction cells
  • Earth-abundant simultaneous transparent conducting oxide and anti-reflective coating materials
  • Earth-abundant PV materials
  • Split junction concentrating photovoltaics.

Thermophotovoltaics (TPVs)

  • Extended wavelength (2-10 micron) TPV cells
  • Nano-structure enhanced performance TPV cells.

Metamaterials (MMs)

  • High temperature selective thermal emitters for TPV cells
  • Long wavelength selective thermal emitters for TPV cells
  • Static and dynamic polarizers for photodetctor applications
  • Photonic Crystal Filters for TPV and photodetector applications

 

Photodetectors

  • Type-II strained-layer superlattices (SLS) IR photodetectors
  • Quantum dots in a well (DWELL) IR photodetectors
  • Low-noise, multi-spectral, tunable, detectors for IR astronomy

High-Speed Devices

  • Terahertz transistors
  • High-speed, low-voltage, semimetal-semiconductor rectifying diodes
  • Novel strain-free gate/channel materials for high-speed (500+ GHz)  DHBTs and FETs

 

Past Research Projects:

Germanium quantum-dot quantum cellular automata (QCA)

Silicon-Germanium quantum dot superlattices

Sb-based type-II DHBT high-speed transistors