light-emitting diode (LED)
@[email protected] (often a combination of gallium, arsenic and phosphorous or gallium and nitrogen) containing an n region (where electrons are more numerous than positive charges) separated from a p region (where positive charges are more numerous than negative charges). Upon application of a voltage, charges move and emission of @[email protected], @[email protected] or @[email protected] radiation is produced each time a @[email protected] takes place. Although a LED emits incoherent monochromatic light, normally a very narrow @[email protected] range is obtained.
  1. This effect is a form of @[email protected]
  2. The colour depends on the semi-conducting material used, and can be @[email protected], @[email protected] or @[email protected]
  3. Organic light-emitting devices (OLEDs) contain diodes made of small molecules or made of @[email protected] materials. The latter are sometimes called PLEDs.
PAC, 2007, 79, 293. (Glossary of terms used in photochemistry, 3rd edition (IUPAC Recommendations 2006)) on page 364 [Terms] [Paper]