To understand what American scientists from Argonne National Laboratory have achieved, we need to take a look at the perovskites themselves and what they are. Strictly speaking, the name perovskite actually refers to a mineral made of calcium titanate (CaTiO).3), which are found in ultrabasic rocks, for example pegmatite veins. The structure of this metal has been an inspiration for the development of a whole family of compounds that photovoltaics experts use in research. In the field of photoelectrochemistry, perovskites are actually called many halides, which often have a completely different chemical formula than CaTiO3.
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It often happens that solar cells in which the absorbing layer consists of these compounds are called perovskites. It’s a somewhat informal name, but it still clearly separates different types of photovoltaics from each other – primarily perovskites from silicon.
So what is the perovskite whose properties the Argonne researchers studied? Cesium lead bromide with the formula CsPbBr3. From articles in Advanced materials I Advanced optical materials We could discover that the mentioned compound showed excellent performance as an X-ray detector.
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Perovskites can be used in X-ray synchrotrons
Every one of us who has broken a bone and been referred for an X-ray has probably heard of ‘x-rays’. X-ray technology has recently advanced significantly, and today we are able to examine more complex systems, such as the internal parts of working batteries.
Unfortunately, this type of monitoring requires cheap, sensitive detectors that can handle high-energy X-rays well. This turned out to be perovskite made from cesium bromide and lead. Its production does not generate high costs, and we obtain a compound capable of detecting radiation patterns almost perfectly.
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Scientists produced CsPbBr3 In two ways. One involved melting and cooling the material to induce the perovskite crystallization process. The second operation was performed in a solution in which crystals of the desired substance were grown. Further research, as reported by scientists in press releasewill focus on improving and increasing the volume of perovskite production.
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