期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 59, 期 48, 页码 21693-21697出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202009329
关键词
dimensional reduction; hybrid perovskite ferroelectrics; polarized-light detection; solar-blind ultraviolet
资金
- NSFC [21875251, 21833010, 21525104, 21971238, 21975258, 61975207, 21921001]
- NSF of Fujian Province [2018H0047]
- Key Research Program of Frontier Sciences of CAS [ZDBS-LY-SLH024]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB20010200]
- Youth Innovation Promotion of CAS [Y201851]
Polarized-light detection in solar-blind ultraviolet region is indispensable for optoelectronic applications, whereas new 2D candidates targeted at solar-blind UV range remain extremely scarce. 2D hybrid perovskite ferroelectrics that combine polarization and semiconducting properties are of increasing interest. Here, using the 3D-to-2D dimensional reduction of CH3NH3PbCl3, we designed a multilayered hybrid perovskite ferroelectric, (CH3CH2NH3)(2)(CH3NH3)(2)Pb3Cl10, which shows spontaneous polarization and a high Curie temperature (390 K) comparable with that of BaTiO3(393 K). The wide band gap (ca. 3.35 eV) and anisotropic absorbance stemming from its intrinsic 2D motif, greatly favor its polarization-sensitive activity in UV region. The device displays excellent polarization-sensitive behavior under 266 nm, along with a large dichroic ratio (ca. 1.38) and high on/off current ratio (ca. 2.3x10(3)).
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