High-Temperature Rectifiers, UV Photodiodes, and Blue LEDs in 6H-SiC

Edmond, J. A.; Kong, H.S.; CarterJr., C. H.

doi:10.1007/978-3-642-84804-9_50

Cited by 5 publications

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Light‐Emitting Diodes

Kish

2000

Kirk-Othmer Encyclopedia of Chemical Technology

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Light Generation (Light‐emitting diodes). The light‐emitting diode (LED) is one of the most technologically fundamental and commercially important of compound semiconductor devices. Such emitters consist of a p – n junction diode formed in compound semiconductor material that emits radiation in the ultraviolet, visible, or infrared in response to an electrical current passing through a forward‐biased device. Radiative recombination in these devices is strongly influenced by a variety of material and structural properties, including the nature of the energy gap of the semiconductor and the presence of impurities or defects in the device. An important challenge in these devices is the ability to extract light from the high index semiconductor material into the outside world. Generally, LEDs may be grouped into two categories depending on performance and application. Visible or display emitters are utilized in lighting applications, and communications LEDs (mostly infrared) are utilized to optically transmit data. The various optoelectronic components, materials systems, and types of layered structures and dopants are discussed. Device design, fabrication techniques, and performance and presented.

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