What is the band gap of ZnO?
3.37 eV
ZnO has a band gap of 3.37 eV, which corresponds to emission in the UV region. This band gap is very close to that of GaN (3.39eV), and GaN has been the subject of much research over the past years, even being incorporated into the recent Blu-Ray drives.
Is ZnO a direct band gap?
Zinc oxide, an important semiconductor with a direct wide band gap and large exciton binding energy, has been used for solar cells, transparent electrodes, and blue/ultraviolet light emitting devices.
What is the conduction band edge?
EC: The conduction band edge should be indicated in situations where electrons might be transported at the bottom of the conduction band, such as in an n-type semiconductor. The conduction band edge may also be indicated in an insulator, simply to demonstrate band bending effects.
Is ZnO conductive?
Zinc oxide (ZnO) belongs to the class of transparent conducting oxides which can be used as transparent electrodes in electronic devices or heated windows.
What is the formula for band gap calculation?
Then you can calculate the band gap energy by using equation: Eg (eV) = 1240/(wavelength in nm). For example, if the intensity arises from the baseline at 340 nm, then you have a material with band gap of 3.65 eV.
What is electronic conduction band?
The conduction band is the band of electron orbitals that electrons can jump up into from the valence band when excited. When the electrons are in these orbitals, they have enough energy to move freely in the material. This movement of electrons creates an electric current.
What kind of oxide is ZnO?
Zinc oxide is an amphoteric oxide. It is nearly insoluble in water, but it will dissolve in most acids, such as hydrochloric acid: ZnO + 2 HCl → ZnCl2 + H2O.
What is the electrical conductivity of ZnO?
[45] reported that the conductivity for nanophase ZnO having particle size of 60 nm is in the range 2 × 10−6 to 2 × 10−4 S/cm at 450–600 °C.
How is the band gap of TiO2 calculated?
For a simply calculating, the bandgap of TiO2 is the lowest point at the absorbance edge. Then, you can calcutate following, Eg=1240/wavelength. You may also have interference fringes, which you might need to simulate to account for.