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Tailored Engineering of an Unusual (C 4 H 9 NH 3 ) 2 (CH 3 NH 3 ) 2 Pb 3 Br 10 Two‐Dimensional Multilayered Perovskite Ferroelectric for a High‐Performance Photodetector
Author(s) -
Li Lina,
Sun Zhihua,
Wang Peng,
Hu Weida,
Wang Sasa,
Ji Chengmin,
Hong Maochun,
Luo Junhua
Publication year - 2017
Publication title -
angewandte chemie
Language(s) - English
Resource type - Journals
eISSN - 1521-3757
pISSN - 0044-8249
DOI - 10.1002/ange.201705836
Subject(s) - perovskite (structure) , ferroelectricity , crystal structure , hybrid material , chemistry , crystallography , single crystal , crystal engineering , materials science , nanotechnology , optoelectronics , dielectric , supramolecular chemistry
Two‐dimensional (2D) layered hybrid perovskites have shown great potential in optoelectronics, owing to their unique physical attributes. However, 2D hybrid perovskite ferroelectrics remain rare. The first hybrid ferroelectric with unusual 2D multilayered perovskite framework, (C 4 H 9 NH 3 ) 2 (CH 3 NH 3 ) 2 Pb 3 Br 10 ( 1 ), has been constructed by tailored alloying of the mixed organic cations into 3D prototype of CH 3 NH 3 PbBr 3 . Ferroelectricity is created through molecular reorientation and synergic ordering of organic moieties, which are unprecedented for the known 2D multilayered hybrid perovskites. Single‐crystal photodetectors of 1 exhibit fascinating performances, including extremely low dark currents (ca. 10 −12 A), large on/off current ratios (ca. 2.5×10 3 ), and very fast response rate (ca. 150 μs). These merits are superior to integrated detectors of other 2D perovskites, and compete with the most active CH 3 NH 3 PbI 3 .