Effective band-gaps of a superlattice.
| Effective bandgaps of a superlattice |
Samarth Agarwal,Kyle Montgomery, Timothy Boykin, Gerhard Klimeck and Jerry Woodall |
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Objective:
- Band-gap engineering to maximize efficiency of solar cells/LEDs.
Approach:
- 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.
Impact:
- Application to solar cell technology is immense.
- Will serve as a guideline for experiments.
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Powerpoint slide as ppt, pdf, or as image below.
