McGill University researchers have gained new insights into the properties of perovskites, one of the world's most promising materials, to produce a more efficient, robust and cost-effective solar cell.
In a study published today in Nature Communications researchers used a multi-dimensional electronic spectrometer (MDES) ̵
A Most Exciting Discovery
"It's the Most Exciting Outcome I've Ever attended" Lead author and McGill chemistry professor Patanjali Kambhampati reported on the discovery of the liquid-solid duality of perovskite. "Instead of looking for perfection in defect-free silicon microelectronics, we have a flawed thing here that is defect-tolerant, and now we know a bit more about why that is."
Solids work like liquids
How the researchers Looking at the crystals with the MDES, they challenged our traditional understanding of the difference between liquids and solids.
"Since childhood, we have learned of solids from Differentiating fluids based on intuition: We know solids as a solid form, while liquids take on the shape of their container, "said Hélène Seiler, senior author of the study and former graduate student. Student at the Faculty of Chemistry at McGill, currently at the Faculty of Physical Chemistry, Fritz Haber Institute at the Max Planck Institute. "But if we look at what the electrons in this material are actually doing in response to light, we find that they behave the way they normally do in a liquid, they are clearly not in a liquid – they are The difference between a solid and a liquid is that atoms or molecules dance in a liquid, whereas in a solid the atoms or molecules in the space are more solid than in space a grid. "
Researchers synthesize new liquid crystals that allow directional transmission of electricity
Hélène Seiler et al. Two-dimensional electronic spectroscopy shows liquid-like line-form dynamics in CsPbI3 perovskite nanocrystals, Nature Communications (2019). DOI: 10.1038 / s41467-019-12830-1
Promising discovery could lead to a better, cheaper solar cell (2019, October 31)
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