Solar cells have the ability to recreate the lightA kind of new materials manufactured solar cells in addition to the ability to turn light into electricity also can reproduce, emit light to absorb again.pinmattroiThe solar panels. Photo: ReutersBusiness Insider Guide to the report in the journal Science today 17/3 indicates the type of material between lead halide (salt of lead and halogen element 1-Chlorine, Fluorine, Bromine, iodine) and perovskite (CaTiO3) ore likely to absorb sunlight, creating particles and then also can emit light."We know that this material absorbs light and create the particles are very good", co-author of the study, Dr. Felix Deschler, University of Cambridge, England, said. "We proved it can re create the photons of light".Solar cells operated in absorbing light energy-the photon energy into – transfer particles to form the current.Hybrid battery lead perovskite-halogen chemistry has long been renowned for the energy conversion efficiency is very good, but the team of Deschler also prove that the perovskite can actually emit light after the above process to absorb again.As a result, the battery acts as a device to focus electric, has the ability to create more energy, increasing the voltage with a higher light source available, compared to the material not capable of reproducing the light."The performance of solar cells at present to about 20-21%, while the maximum theoretical performance is 33%. Our research could usher in a direction to achieve that performance, "said Deschler.The performance of a solar cell is the percentage of light energy that it can convert into electricity. According to the calculation theory of thermodynamics in 1961 by William Shockley and Hans Queisser, the limit of this performance was 33%.According to the researchers, this material not only high performance but also very easy to manufacture, cheap price, capable of commercial."You will not believe that it can reproduce light, by building it too simple compared to other categories," said Deschler. "Our material is also very cheap and flexible".Solar cell fabrication process currently requires control of the process of formation of the structure of materials. Impurities in the Crystal structure and will leave a "defect" in the material, which reduces the light absorption features. But the new material is outside this rule."We are having to learn the cause why this material better than other types of expression," said Deschler.The researchers hope to attract interest from the solar cell manufacturers are looking for a solution to harness this energy source is cheaper, more efficient.
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