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Title: 2D Cairo pentagonal PdPS : air-stable anisotropic ternary semiconductor with high optoelectronic performance
Authors: Duan, Ruihuan
He, Yanchao
Zhu, Chao
Wang, Xiaowei
Zhu, Chao
Zhao, Xiaoxu
Zhang, Zhonghan
Zeng, Qingsheng
Deng, Ya
Xu, Manzhang
Liu, Zheng
Keywords: Engineering::Materials
Issue Date: 2022
Source: Duan, R., He, Y., Zhu, C., Wang, X., Zhu, C., Zhao, X., Zhang, Z., Zeng, Q., Deng, Y., Xu, M. & Liu, Z. (2022). 2D Cairo pentagonal PdPS : air-stable anisotropic ternary semiconductor with high optoelectronic performance. Advanced Functional Materials.
Project: NRF-CRP22-2019-0007
Journal: Advanced Functional Materials
Abstract: Pentagonal 2D materials as a new member in the 2D material family have attracted increasing attention due to the exotic physical properties originating from the unique Cairo pentagonal tiling topology. Herein, the penta-PdPS atomic layers as a new air-stable 2D semiconductor with the unique puckered pentagonal low-symmetry structure are successfully exfoliated from bulk crystals grown via chemical vapor transport (CVT). Notably, 2D pentaPdPS exhibits outstanding electronic and optoelectronic performance under 650 nm laser: high electron mobility of ≈208 cm2 V−1 s−1, an ultrahigh on/off ratio of ≈108, a high photoresponsivity of 5.2 × 104 A W−1, a high photogain of 1.0 × 105, an ultrahigh detectivity of 1.0 × 1013 Jones, respectively. Significantly, the exceptional puckered pentagonal atomic structure of 2D PdPS makes it strong in-plane anisotropy in optical, electronic, and optoelectronic properties, demonstrating a sizeable anisotropic ratio of carrier mobility and photocurrent with the value of up to 3.9 and 2.3, respectively. These excellent properties make 2D Cairo Pentagonal PdPS a potential candidate in nanoelectronics, optoelectronics, polarized-nanoelectronics, which will significantly promote the development of 2D materials.
ISSN: 1616-301X
DOI: 10.1002/adfm.202113255
Rights: © 2022 Wiley-VCH GmbH. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
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