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Fabrication of CH 3 NH 3 PbBr 3 ‐Based Perovskite Single‐Crystal Arrays by Spin‐Coating Method Using Hydrophobic Patterned Substrate
Author(s) -
Abe Ryogo,
Suzuki Asuka,
Watanabe Kosuke,
Kikuchi Akihiko
Publication year - 2020
Publication title -
physica status solidi (a)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.532
H-Index - 104
eISSN - 1862-6319
pISSN - 1862-6300
DOI - 10.1002/pssa.201900511
Subject(s) - fabrication , spin coating , substrate (aquarium) , perovskite (structure) , halogen , materials science , crystal (programming language) , single crystal , solvent , mixing (physics) , chemical engineering , crystallography , coating , analytical chemistry (journal) , chemistry , nanotechnology , chromatography , organic chemistry , medicine , oceanography , alternative medicine , alkyl , physics , pathology , quantum mechanics , engineering , geology , computer science , programming language
A simple and low‐cost fabrication technique is proposed for CH 3 NH 3 PbBr 3 ‐based perovskite single‐crystal arrays by combining spin coating and a hydrophobic/hydrophilic patterned substrate. By optimizing the substrate surface treatment, the mixing ratio of the precursor solution, and the spin conditions, the precursor solution is uniformly aligned on the hydrophilic area, and the perovskite single crystal is precipitated at the center of the pattern area. The average lateral diameter of the precipitated plate‐like crystals is controlled from 5 to 30 μm by changing the precursor concentration. The emission color of the precipitated crystals varies in the whole visible light region from violet (404 nm) to red (776 nm) by controlling the halogen composition of CH 3 NH 3 PbBr 3– n X n (X = Cl, I) crystals via optimization of the solvent composition.