期刊
SMALL
卷 18, 期 15, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/smll.202200011
关键词
bulk photovoltaic effect; in-plane polarized light detection; lead-free hybrid perovskites; polar van der Waals perovskites; self-powered photodetection
类别
资金
- National Natural Science Foundation of China [21971238, 22175177, 21833010, 21875251, 21975258, 61975207, 21921001]
- Key Research Program of Frontier Sciences of the Chinese Academy of Sciences [ZDBS-LY-SLH024]
- NSF of Fujian Province [2018H0047]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB20010200]
- Youth Innovation Promotion of CAS
In this study, a lead-free van der Waals perovskite (Cl-PMA)(2)CsAgBiBr7 was successfully designed using a dimension reduction strategy, enabling self-powered in-plane polarized light detection based on the bulk photovoltaic effect (BPVE). This represents the first in-plane polarized light detection in hybrid perovskites based on BPVE, highlighting the potential for developing highly sensitive polarized light detection in 2D van der Waals materials.
2D van der Waals materials are widely explored for in-plane polarized light detection owing to their distinctive in-plane anisotropic feature. However, most of these polarized light-sensitive devices root in their low symmetry of in-plane structure and work depending on external power sources, which greatly impedes the simplification of integrated devices and sustainable development. Bulk photovoltaic effect (BPVE), which separates photoexcited carriers via built-in electric field without an external power source and shows an angle-dependence on light polarization, is promising for self-powered polarized light detection to break through the restriction of in-plane anisotropy. Herein, a 2D lead-free van der Waals perovskite (Cl-PMA)(2)CsAgBiBr7 (1, Cl-PMA = 4-Chlorobenzylamine) is successfully designed through the dimension reduction strategy. 1 exhibits BPVE with an open-circuited photovoltage up to approximate to 0.5 V. Driven by the BPVE, self-powered in-plane polarized light detection with a large polarization ratio of 1.3 is obtained for 1. As far as it is known, the first in-plane polarized light detection in hybrid perovskites based on BPVE is realized here. This work highlights the strategy of designing lead-free hybrid perovskite with BPVE and opens an avenue for exploiting in-plane highly sensitive polarized light detection in 2D van der Waals materials.
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