Abstract:
The group III-Nitride solid state devices, which have permeated our daily life, are
light emitting diodes (LEDs) and laser diodes (LDs). In fact, they have been
overshadowed only by the transistor. The power efficiency, ruggedness and compactness
of these light emitting devices are unbeatable and have greatly contributed to their
dissemination. LEDs are seen on electronic billboards at airports, subways and train
stations indicating important information, and are extensively used as back-lighting and
indicators in all electronic applications that requires a human interface. More recently, 3D
displays based on LEDs are posing challenge to LCD displays and are overtaking other
devices. Since the 1980s, LDs and LEDs led to the creation of a whole new branch of
consumer electronics in the form of CD and DVD players/writers, laser printers and fibreoptics.
The potential of High Brightness LEDs which can replace all Solid State Lighting,
and the possibilities for forming full-spectrum Solar Cells, make these materials the most
sought after by researchers and industries.
