Only perovskites in solar cells?  Americans say “nonsense” and show their nonsense

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.

Perovskite crystals / Source: Wikimedia Commons, CCP-SA 3.0

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.

Cesium and lead bromide / Source: Argonne National Laboratory, press materials

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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