Eco Trees

Solar cells of polymers are used by people to convert light energy into electricity. They are damaged by ultraviolet rays, however, and it dramatically limits their life. Yang Yang, a professor at the University of Los Angeles, was found a solution to prevent this process. Solar cells could be covered in a protection material.

The new material can convert invisible photons from ultraviolet rays of the electromagnetic frequency where bigger. In other words, the new filter to prevent utraviolete rays reach the plastic material from which solar cell is formed. By converting photons on other frequencies, boosts brightness useful, and therefore we are intensifying the capture of solar energy, reducing each other simultaneously, the danger of damage to cells.

This phenomenon, says Yang Yang, significantly increases the lifetime of solar cells and, while they increase yield. The material that converts photons may be liquid or solid, and while scientists have added experience in the chemical composition of cells.


What are solar cells?

A solar cell is composed of two or more layers of semiconductor material, most silicon being met. These layers have a thickness between 0.001 and 0.2 mm. This structure is similar to that of a diode.

When the layer of silicon is exposed to light, producing an "agitation" of material electrons and generate electricity. The cells, called photovoltaic cells, usually a very small area and the current generated by a single cell is small.

Typically are combinations of these cells, which can produce currents sufficient to be used in practice. To do this, the cells are placed in panels, which provides mechanical resistance.