From Wikipedia, the free encyclopedia
Quantum heterostructure is a heterostructure in a substrate (usually a semiconductor material), with size restricting the movements of the charge carriers and forcing them into a quantum confinement, leading to formation of a set of discrete energy levels the carriers can exist at. Quantum heterostructures have sharper density of states than structures of more conventional sizes.
Quantum heterostructures are important for fabrication of short-wavelength light-emitting diodes and diode lasers, and for other optoelectronic applications, eg. high-efficiency photovoltaic cells.
Examples of quantum heterostructures are:
- Quantum wells
- Quantum dots
- Quantum wires
- Quantum heterostructure – development and applications