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Title: Chiral 2D-perovskite nanowires for stokes photodetectors
Authors: Zhao, Yingjie
Qiu, Yuchen
Feng, Jiangang
Zhao, Jiahui
Chen, Gaosong
Gao, Hanfei
Zhao, Yuyan
Jiang, Lei
Wu, Yuchen
Keywords: Science::Physics
Issue Date: 2021
Source: Zhao, Y., Qiu, Y., Feng, J., Zhao, J., Chen, G., Gao, H., Zhao, Y., Jiang, L. & Wu, Y. (2021). Chiral 2D-perovskite nanowires for stokes photodetectors. Journal of the American Chemical Society, 143(22), 8437-8445.
Journal: Journal of the American Chemical Society 
Abstract: Structural engineering in multiple scales permits the integration of exotic properties into a single material, which boosts the development of ultracompact multifunctional devices. Layered perovskites are capable of cross-linking efficient carrier transport originating from few-layer perovskite frameworks with extended functionalities contributed by designable bulky organic cations and nanostructures, thus providing a platform for multiscale material engineering. Herein, high-performance Stokes-parameter photodetectors for arbitrary polarized light detection are realized on the basis of solution-processed chiral-perovskite nanowire arrays. The chiral ammonium cations intercalated between the perovskite layers are responsive to circularly polarized light with a maximum anisotropy factor of 0.15, while the strictly aligned nanowires with the anisotropic dielectric function result in a large polarized ratio of 1.6 to linearly polarized light. Single crystallinity and pure crystallographic orientation permit efficient in-plane carrier transport along the nanowires, yielding a responsivity of 47.1 A W-1 and a detectivity of 1.24 × 1013 Jones. By synergy of linear- and circular-polarization response with high optoelectronic performance for providing sufficient photocurrent contrasts, Stokes-parameter photodetection is demonstrated on these nanowires. Our Stokes-parameter photodetectors with a small footprint and high performances present promising applications toward polarization imaging.
ISSN: 0002-7863
DOI: 10.1021/jacs.1c02675
Schools: School of Physical and Mathematical Sciences 
Rights: © 2021 American Chemical Society. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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