arsenic (As)
Arsenic (As) is a chemical element used in semiconductor technology for dopingsilicon or germanium.
Arsenic can be used to produce n-doped silicon and germanium layers. Arsenic is introduced into semiconductors by diffusion or ion implantation. It is also used in III-V compound semiconductors and in combination with gallium as gallium arsenide( GaAs) in light-emitting diodes, photodiodes and solar cells, among other applications.
The chemical element has the atomic number 33 in the periodic table.