This illustration represents a quantum well, a nanostructure in which a thin layer of semiconductor material (typically with a narrow bandgap) is sandwiched between two thicker layers of a ...

Epitaxial growth techniques make it possible to control the thickness of semiconductor layers at the atomic level and create carefully designed quantum-well structures that trap electrons.

Scientists in the United States have fabricated a triple-junction solar cell that reached 39.5% efficiency – a world record for any type of cell ... by thick quantum well superlattices ...