III-V compound

…“III-V” group of semiconductors—that is, compounds made of elements listed in columns III and V of the periodic table. Varying the precise composition of the semiconductor can alter the wavelength (and therefore the color) of the emitted light.

These so-called III-V compounds are used to make semiconductor devices that emit light efficiently or that operate at exceptionally high frequencies.

…semiconductor devices and circuits employs III–V technology, so named because it is based on crystalline compounds formed by combining metallic elements from column III and nonmetallic elements from column V of the periodic table of chemical elements. When the elements are gallium and arsenic, the semiconductor is called gallium arsenide,…

…bonding is typical of the III–V semiconductors—i.e., those consisting of one element from the third column of the periodic table and one from the fifth column. Elements from the third column (boron, aluminum, gallium, and indium) contribute three electrons, while the fifth-column elements (nitrogen, phosphorus, arsenic, and antimony) contribute five…