A @S05736@ in which the @A00106@ is the p-n junction between p-type and n-type @S05591@ host materials. This term is preferred over the sometimes-used term @S05596@.
PAC, 1995, 67, 1913. (Nomenclature, symbols, units, and their usage in spectrochemical analysis-XV. Laser-based molecular spectroscopy for chemical analysis - laser fundamentals (IUPAC Recommendations 1995)) on page 1920 [Terms] [Paper]
See also:
PAC, 1996, 68, 2223. (Glossary of terms used in photochemistry (IUPAC Recommendations 1996)) on page 2236 [Terms] [Paper]