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New Perovskite Nanocrystals Show More Durability

Perovskite nanocrystals hold promise for enhancing all kinds of optoelectronic devices—from lasers to light-emitting diodes (LEDs) – however, issues with their durability nonetheless limit the material’s broad commercial use.

Researchers on the Georgia Institute of Technology have revealed a novel approach aimed at addressing the material’s durability problem enclosing the perovskite inside a double-layer safety system produced from plastic and silica.

In research published Nov. 29, within the journal Science Advances, the research group describes a multistep course to produce encased perovskite nanocrystals that exhibit strong resistance to degradation in moist environments.

The term perovskite refers back to the crystal structure of the material, which is usually composed of three parts: two cations of various sizes and an anion in between. For many years, researchers have examined substituting varied chemicals into the construction to realize distinctive traits. In particular, perovskites contain halide compounds such as bromine and iodine can act as light absorbers and emitters.

For this examine, which was supported by the Air Force Office of Scientific Analysis, the Department of Energy, the Defense Threat Reduction Agency, National Science Foundation, and Lin’s group labored with probably the most frequent halide configurations, which is shaped from methylammonium, lead, and bromide.

To check the material, the researchers coated glass substrates with a skinny movie of the encapsulated perovskites and carried out a number of stress tests, including immersing the complete pattern in deionized water.

Future research might center on developing totally different perovskite nanocrystal systems, together with all-inorganic perovskites, double perovskites, and doped perovskites.

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