Ga
0.5
In
0.5
P/GaAs/Ge Solar Cell
34% efficient under concentrated sunlight
ENABLE JAVASCRIPT
TO LOAD IMAGE
Multiple layers of semiconductors with decreasing bandgaps capture large range of photon energies.
ENABLE JAVASCRIPT
TO LOAD IMAGE
Lattice match prevents defects or dislocations where recombination can occur.
http://www.nrel.gov/ncpv/higheff.html
http://vmsstreamer1.fnal.gov/VMS_Site_02/Lectures/colloquium/Presentations/Friedman.pdf