Samarth Agarwal

Effective band-gaps of a superlattice.

Effective bandgaps of a superlattice Samarth Agarwal,Kyle Montgomery, Timothy Boykin, Gerhard Klimeck and Jerry Woodall


  • Band-gap engineering to maximize efficiency of solar cells/LEDs.


  • Construct digital alloys or superlattices of different periods to get the desired band-gap.
  • Choose material system such that the band-gap range spans the optimum regions in the solar spectrum.
  • Construct periodic structures using tight-binding to find electron/hole resonant levels.
  • Use these values to estimate band-gaps for different superlattice periods.


  • Application to solar cell technology is immense.
  • Will serve as a guideline for experiments.

Powerpoint slide as ppt, pdf, or as image below.