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http://hdl.handle.net/10397/87799
Title: | Gradient 2D/3D perovskite films prepared by hot-casting for sensitive photodetectors | Authors: | Loi, HL Cao, JP Guo, XY Liu, CK Wang, NX Song, JJ Tang, GQ Zhu, Y Yan, F |
Issue Date: | 22-Jul-2020 | Source: | Advanced science, 22 July 2020, v. 7, no. 14, 2000776, p. 1-9 | Abstract: | 2D Ruddlesden-Popper perovskites have attracted wide attention recently because of tunable optoelectronic properties and have been used as alternatives to their 3D counterparts in various optoelectronic devices. Here, a series of (PEA)(2)(MA)(n)-1PbnI3n+1 perovskite thin films is designed and fabricated by a convenient hot-casting method to obtain gradient n in the films, which leads to the formation of vertical heterojunctions that can enhance charge separation in the films under light illumination. Based on a single gradient perovskite film, a highly sensitive and stable photodetector with a responsivity up to 149 AW(-1) and a specific detectivity of 2 x 10(12) Jones is obtained. This work paves a way to realizing high-performance optoelectronic devices with enhanced charge separation by introducing compositional gradient in a perovskite film. | Keywords: | 2D perovskites Hot-casting Perovskites Photodetectors Vertical heterojunctions |
Publisher: | Wiley-VCH | Journal: | Advanced science | ISSN: | 2198-3844 | DOI: | 10.1002/advs.202000776 | Rights: | © 2020 The Hong Kong Polytechnic University. Published by WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim This is an open access article under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits use, distribution and reproduction in any medium, provided the original work is properly cited. The following publication Loi, H. L. , Cao, J. P. , Guo, X. Y. , Liu, C. K. , Wang, N. X. , Song, J. J. , . . . Yan, F. (2020). Gradient 2D/3D perovskite films prepared by hot-casting for sensitive photodetectors. Advanced Science, 7(14), 2000776, 1-9 is available at https://dx.doi.org/10.1002/advs.202000776 |
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