2-D perovskite materials found to have unique, conductive edge states

phys.org | 7/11/2019 | Staff
baileyboo (Posted by) Level 3
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A new class of 2-D perovskite materials with edges that are conductive like metals and cores that are insulating was found by researchers who said these unique properties have applications in solar cells and nanoelectronics.

"This observation of the metal-like conductive states at the layer edges of these 2-D perovskite materials provides a new way to improve the performance of next-generation optoelectronics and develop innovative nanoelectronics," said Kai Wang, assistant research professor in materials science and engineering at Penn State and lead author on the study.

Wang - Team - Penn - State - Researchers

Wang and a team of Penn State researchers made the discovery while synthesizing lead halide perovskite materials for use in next generation solar cells. Perovskites, materials with a crystal structure good at absorbing visible light, are an area of focus in developing both rigid and flexible solar cells that can compete commercially with traditional cells made with silicon. These 2-D perovskite materials are cheaper to create than silicon and have the potential to be equally efficient at absorbing sunlight.

The findings, reported in Science Advances, provide new insights into the charge and energy flow in perovskite materials, important for the continued advancement of the technology, the scientists said.

Beauty - Work - Material - Properties - Edges

"I think the beauty of this work is that we found a material that has completely different properties along the edges compared to the core," said Shashank Priya, professor of materials science and engineering and associate vice president for research at Penn State. "It's very unusual that the current can flow around the edges and...
(Excerpt) Read more at: phys.org
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