Researchers achieve temperature-dependent phase stable hybrid halide perovskite films by CVD

Dec 15, 2022 01:23 PM ET
  • Scientists from South-Africa's University of the Western Cape, University of Missouri and also Argonne National Laboratory have actually created a new way of boosting the stability and also performance of perovskites.

Missouri University teacher Suchismita (Suchi) Guha, the lead writer of the study, and also her collaborators improved the methods for making lead halide perovskites. Previous techniques for making these thin-film perovskites needed liquid processing making use of solvents, which provided the films susceptible to degradation when revealed to air. Furthermore, with previous production procedures, one of its particles undergoes an adjustment to its structure, creating performance constraints in real-world operating problems.

With the new technique, the researchers were able to protect against the change, holding the impacted molecule in a stable framework throughout a huge temperature variety. Additionally, the new technique provided the perovskite air stable, making it suitable for a potential solar cell.

" There have actually been lots of researches that have considered ways to try to improve the security of hybrid perovskites, including diffusion barriers, additive design, and also chemically inert electrode optimization, yet this is just one of the first researches to check out the growth method itself as a way to improve the final performance of the device," Guha stated.

To verify the molecular structure of the perovskite material, Guha as well as her associates, consisting of Argonne physicist Evguenia (Jenia) Karapetrova, made use of X-ray diffraction measurements at Argonne's Advanced Photon Source (APS), a DOE Office of Science customer center.

" Being able to characterize the perovskite structure at the APS supplies a unique window right into the possibilities of this practical material," Karapetrova stated.

" Protecting against the phase change appears to be the key to make sure better tool performance," Guha claimed. "By preserving a stable structure throughout the operating temperature level window, we show the way to an improved as well as potentially helpful perovskite."

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