What is the band gap of CdTe?
CdTe is a II–VI compound semiconductor. It is a well-known light absorber. It has band gap of 1.45 eV.
Is CdTe a metal?
Cadmium telluride (CdTe) is a stable crystalline compound formed from cadmium and tellurium. It is mainly used as the semiconducting material in cadmium telluride photovoltaics and an infrared optical window….Cadmium telluride.
| Names | |
|---|---|
| ChemSpider | 82622 |
| ECHA InfoCard | 100.013.773 |
| EC Number | 215-149-9 |
| PubChem CID | 91501 |
What are the coordination numbers of Cd and Te in cadmium telluride?
A variety of Cd, Te, and CdTe lattices with coordination numbers between 4 and 12 are considered.
How is CdTe made?
Production. The most common CdTe solar cells consist of a p-n heterojunction structure containing a p-doped CdTe layer matched with an n-doped cadmium sulfide (CdS) or magnesium zinc oxide (MZO) window layer. Typical CdTe thin-film deposition techniques include vapor-transport deposition and close-spaced sublimation.
Is CdTe n type or p type?
They state that undoped CdTe is p-type semiconductor, but addition of In creates n-type material. They define a narrow concentration range over which the CZT transforms from p-type to n-type.
How do CdTe solar cells work?
The CdTe film acts as the primary photoconversion layer and absorbs most visible light within the first micron of material. Together, the CdTe, intermediate, and TCO layers form an electric field that converts light absorbed in the CdTe layer into current and voltage.
Is CdTe toxic?
CdTe is still a potentially toxic material. But the way it is encapsulated in glass in First Solar panels, Sinha said, sharply limits the possibility of inhalation or ingestion exposure. “The semiconductor material is bonded to a sheet of glass under very high temperature,” Sinha explained.
What is the formula for cadmium telluride?
CdTe
Cadmium telluride/Formula
How does a CdTe cell work?
What are the demonstrated advantages of CdTe 2nd generation technologies for solar cells?
It also has a band gap close to ideal at 1.43eV,3 with advantages including good absorption and low energy losses. CdTe solar cells can be made through low-temperature processes, allowing flexible and affordable production (as with OPVs) – which is preferable to expensive and time-consuming high-temperature processes.
How does CdTe detector work?
The PILATUS3 X CdTe detector series uses cadmium telluride (CdTe) crystals as the sensor material for direct conversion of the hard X-ray radiation. This high-Z semiconductor material (Cd with Z=48, Te with Z=52) provides excellent stopping power, resulting in superior detection efficiency even at high X-ray energies.
Who discovered CdTe?
CdTe solar cells were introduced for the first time in 1972, by Bonnet and Raben- horst [1], with a CdS/CdTe heterojunction delivering a 6% efficiency. Since then, thin film CdTe based solar cells have been fabricated with this type of heterojunction until it has been radically changed in the recent years.