Flexoelectric Engineering of Bulk Photovoltaic Photodetector

Yu, Junxi1,2,3; Huang, Boyuan2,3; Yang, Songjie1,2; Zhang, Yuan2,3; Bai, Yinxin4; Song, Chunlin2,3; Ming, Wenjie2,3; Liu, Wenyuan5; Wang, Junling4; Li, Changjian2,3; Wang, Qingyuan1,6; Li, Jiangyu2,3

2024-05-14

10.1021/acs.nanolett.4c01173

NANO LETTERS   影响因子和分区

1530-6984

1530-6992

The bulk photovoltaic effect (BPVE) offers an interesting approach to generate a steady photocurrent in a single-phase material under homogeneous illumination, and it has been extensively investigated in ferroelectrics exhibiting spontaneous polarization that breaks inversion symmetry. Flexoelectricity breaks inversion symmetry via a strain gradient in the otherwise nonpolar materials, enabling manipulation of ferroelectric order without an electric field. Combining these two effects, we demonstrate active mechanical control of BPVE in suspended 2-dimensional CuInP2S6 (CIPS) that is ferroelectric yet sensitive to electric field, which enables practical photodetection with an order of magnitude enhancement in performance. The suspended CIPS exhibits a 20-fold increase in photocurrent, which can be continuously modulated by either mechanical force or light polarization. The flexoelectrically engineered photodetection device, activated by air pressure and without any optimization, possesses a responsivity of 2.45 x 10(-2) A/W and a detectivity of 1.73 x 10(11) jones, which are superior to those of ferroelectric-based photodetection and comparable to those of the commercial Si photodiode.

Flexoelectric engineering Bulk photovoltaic effect Two-dimensional CuInP2S6 Ferroelectricity Photodetector

SCI ; EI

英语

通讯

Science and Technology Foundation of Shenzhen City[2022YFF0706100] ; National Key Research and Development Program of China["12192213","12350002","12202079","12202394"] ; National Natural Science Foundation of China[2021B1212040001] ; Department of Science and Technology of Guangdong Province[JCYJ20220818100410022] ; Shenzhen Science and Technology Program[2021KCXTD012]

Chemistry ; Science & Technology - Other Topics ; Materials Science ; Physics

Chemistry, Multidisciplinary ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Physics, Applied ; Physics, Condensed Matter

WOS:001225279900001

AMER CHEMICAL SOC

MATERIALS SCIENCE

Web of Science

1.Chengdu Univ, Inst Adv Study, Chengdu 610100, Peoples R China
2.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
3.Southern Univ Sci & Technol, Guangdong Prov Key Lab Funct Oxide Mat & Devices, Shenzhen 518055, Guangdong, Peoples R China
4.Southern Univ Sci & Technol, Dept Phys, Shenzhen 518055, Guangdong, Peoples R China
5.Inst Flexible Elect Technol THU, Jiaxing 314000, Zhejiang, Peoples R China
6.Sichuan Univ, Failure Mech & Engn Disaster Prevent & Mitigat Key, Chengdu 610065, Peoples R China

Yu, Junxi,Huang, Boyuan,Yang, Songjie,et al. Flexoelectric Engineering of Bulk Photovoltaic Photodetector[J]. NANO LETTERS,2024,24(21).

Yu, Junxi.,Huang, Boyuan.,Yang, Songjie.,Zhang, Yuan.,Bai, Yinxin.,...&Li, Jiangyu.(2024).Flexoelectric Engineering of Bulk Photovoltaic Photodetector.NANO LETTERS,24(21).

Yu, Junxi,et al."Flexoelectric Engineering of Bulk Photovoltaic Photodetector".NANO LETTERS 24.21(2024).