What Can Cadmium telluride Be Used?

  Cadmium telluride (CdTe) which is used as an infrared optical window and a solar cell material is a crystalline compound formed from cadmium and tellurium. It is usually sandwiched with cadmium sulfide to form a p-n junction photovoltaic solar cell. Typically, CdTe cells use a n-i-p structure.
Cadmium telluride is often used to make thin film solar cells, accounting for some 6% of all solar cells installed in 2010. They are among the lowest-cost kinds of solar cell,  although a comparison of total installed cost depends on installation size and many other factors, and has changed fast from year to year. Solar cells were produced; when this matter was massively increased, there might eventually be a shortage of tellurium, as Te is among the rarest elements in the Earth's crust. Specifically, production could be expanded by a factor of 1000 to 10000 before running out of Te. Another problem for the technology is the toxicity of cadmium, see below. For more details and discussion see cadmium telluride photovoltaics.
Cadmium telluride can be alloyed with mercury to make a versatile infrared detector material. It alloyed with a small amount of zinc makes an excellent solid-state X-ray and gamma ray detector.
It is used as an infrared optical material for optical windows and lenses but it has small application and is limited by its toxicity such that few optical houses will consider working with it. An early form of CdTe for IR use was marketed under the trademarked name of Irtran-6 but this is obsolete.
Cadmium telluride is also applied for electro-optic modulators. It has the greatest electro-optic coefficient of the linear electro-optic effect among II-VI compound crystals.

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