Ultrathin Solar Cells Using 2D Perovskites Get a Boost in Solar Energy.


Ultrathin Solar Cells Using 2D Perovskites Get a Boost in Solar Energy.

Rice University researchers have discovered that a 2D perovskite molecule has the necessary properties to compete with bulkier products.

Rice University researchers have set a new standard in the construction of atomically thin solar cells constructed of semiconducting perovskites, increasing efficiency while maintaining environmental resistance.

Sunlight itself contracts the space between atomic layers in 2D perovskites, improving the material’s photovoltaic efficiency by up to 18%, according to Aditya Mohite’s lab at Rice’s George R. Brown School of Engineering, an incredible leap in a field where progress is often measured in fractions of a percent.

“The efficiencies of perovskites have risen from roughly 3% to over 25% in the last ten years,” Mohite remarked. “Other semiconductors took around 60 years to reach to this point.” That is why we are so ecstatic.” The findings were published in the journal Nature Nanotechnology.

Perovskites are light-harvesting chemicals with cube-like crystal lattices. Their promise has been recognized for years, but they are beset by a conundrum: they are excellent at turning sunlight into energy, but they are degraded by sunshine and moisture.

“Solar cell technology should last 20 to 25 years,” said Mohite, an associate professor of chemical and biomolecular engineering as well as materials science and nanoengineering. “We’ve been working with bulk perovskites for a long time and will continue to work with them because they’re incredibly efficient but not as stable.” 2D perovskites, on the other hand, offer a lot of stability but aren’t efficient enough to install on a roof.

“The main challenge has been to make them efficient while maintaining stability,” he explained.

Rice engineers and collaborators from Purdue and Northwestern universities, the US Department of Energy national laboratories Los Alamos, Argonne, and Brookhaven, and the Institute of Electronics and Digital Technologies (INSA) in Rennes, France discovered that sunlight effectively shrinks the space between the atoms in certain 2D perovskites, improving their ability to carry a current.

“As you light the material, you compress it like a sponge and bring the layers together to maximize charge transmission in that direction,” Mohite explained. Placing an organic cation layer between the iodide on top and the lead on the bottom improved interactions between the layers, according to the researchers.

“This research has important implications for understanding excited states and quasiparticles in which one layer has a positive charge… Summary of the latest news from Brinkwire.


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