Stabilizing Metal Halide Perovskite Films via Chemical Vapor Deposition and Cryogenic Electron Beam Patterning.

Autor: Burns R; Department of Physics and Astronomy, University of Missouri, Columbia, MO, 65211, USA., Chiaro D; Department of Physics and Astronomy, University of Missouri, Columbia, MO, 65211, USA., Davison H; Department of Physics and Astronomy, University of Missouri, Columbia, MO, 65211, USA., Arendse CJ; Department of Physics and Astronomy, Nano-Micro Manufacturing Facility, University of the Western Cape, Bellville, 7535, South Africa., King GM; Department of Physics and Astronomy, Department of Biochemistry, and MU Materials Science and Engineering Institute, University of Missouri, Columbia, MO, 65211, USA., Guha S; Department of Physics and Astronomy and MU Materials Science and Engineering Institute, University of Missouri, Columbia, MO, 65211, USA.
Jazyk: angličtina
Zdroj: Small (Weinheim an der Bergstrasse, Germany) [Small] 2024 Nov 13, pp. e2406815. Date of Electronic Publication: 2024 Nov 13.
DOI: 10.1002/smll.202406815
Abstrakt: Halide perovskites are hailed as semiconductors of the 21 st century. Chemical vapor deposition (CVD), a solvent-free method, allows versatility in the growth of thin films of 3- and 2D organic-inorganic halide perovskites. Using CVD grown methylammonium lead iodide (MAPbI 3 ) films as a prototype, the impact of electron beam dosage under cryogenic conditions is evaluated. With 5 kV accelerating voltage, the dosage is varied between 50 and 50000 µC cm -2 . An optimum dosage of 35 000 µC cm -2 results in a significant blue shift and enhancement of the photoluminescence peak. Concomitantly, a strong increase in the photocurrent is observed. A similar electron beam treatment on chlorine incorporated MAPbI 3 , where chlorine is known to passivate defects, shows a blue shift in the photoluminescence without improving the photocurrent properties. Low electron beam dosage under cryogenic conditions is found to damage CVD grown 2D phenylethlyammoinum lead iodide films. Monte Carlo simulations reveal differences in electron beam interaction with 3- and 2D halide perovskite films.
(© 2024 Wiley‐VCH GmbH.)
Databáze: MEDLINE
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