Material and Spectral Properties
ITO is a heavily-doped n-type semiconductor with a large bandgap of around 4 eV. Because of the bandgap, it is mostly transparent in the visible part of the spectrum. In the ultraviolet, it is opaque because of band-to-band absorption (a UV photon can excite an electron from the valence band to the conduction band). In the near infrared, it also opaque, because of free carrier absorption (an infrared photon can excite an electron from near the bottom of the conduction band to higher within the conduction band).
Read more about this topic: Indium Tin Oxide
Famous quotes containing the words material, spectral and/or properties:
“There is but one love of Jesus, as there is but one person in the poor—Jesus. We take vows of chastity to love Christ with undivided love; to be able to love him with undivided love we take a vow of poverty which frees us from all material possessions, and with that freedom we can love him with undivided love, and from this vow of undivided love we surrender ourselves totally to him in the person who takes his place.”
—Mother Teresa (b. 1910)
“How does one kill fear, I wonder? How do you shoot a spectre through the heart, slash off its spectral head, take it by its spectral throat?”
—Joseph Conrad (1857–1924)
“A drop of water has the properties of the sea, but cannot exhibit a storm. There is beauty of a concert, as well as of a flute; strength of a host, as well as of a hero.”
—Ralph Waldo Emerson (1803–1882)