Quantum Dot Solar Cell (QDSC) Comments Off on Quantum Dot Solar Cell (QDSC)

What is Quantum Dot Solar Cell (QDSC)?

A quantum dot solar cell (QDSC) is a type of solar cell that uses quantum dots as the captivating or absorbing photovoltaic material. QDSC is used for replacing heavy materials such as silicon, or copper indium gallium selenide (CIGS).

Quantum dots are considered as artificial atoms. Their energy levels are adjustable by altering their size, which in turn delineates the bandgap. It is possible to grow the dots in a variety of sizes, allowing them to convey a variety of bandgaps without changing the underlying material or construction. In the future, QDSC can provide superior efficiency and bring down the cost of standard silicon PV panels.

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Developing affordable solar technology holds the key towards makingthis form of clean energy use both commercially and domestically viable. Researchers at the University of Toronto have been exploring ways toproduce less expensive and more efficient solar cells. They recently demonstrated that nickel can work just as well as gold for electrical contacts in colloidal quantum dot solar cells. It has claimed that this technology will help reduce the cost of quantum dot solar cells by 40 to 80 percent.

In another research work a team from California’s Lawrence Berkeley National Laboratory tried a combination of selenium with zinc oxide.This led to a dramatic increase in oxide’s efficiency in absorbing solar light. It has been found that an increase of selenium concentration bynine percent in a mostly zinc oxide base can have pronounced effect onits ability to absorb light.

Since both quantum dot solar cells and zinc oxide are relatively inexpensive it is claimed that the technology’s commercialization canboost the cells’ overall efficiency

Via: Gizmag

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