Quantum Dot Solar Cells

• Quantum dots are are nanoscale semiconductor particles.

• Their bandgap is defined by not only their composition but also their actual size.

• Use particle size to tune the bandgap to increase efficiency. • Energy transport out of the dot is the difficulty.

http://www.grc.nasa.gov/WWW/RT2001/5000/5410bailey1.html

Barbara Maynard, "Solar Solutions," Chemistry, Spring 2007.