Journal of Alloys and Compounds2022，Vol.9157.DOI:10.1016/j.jallcom.2022.165451

High-performance self-driven photodetectors based on self-polarized Bi0.9Eu0.1FeO3/Nb-doped SrTiO(3 )p-n heterojunctions

Liu, Jun-Ming Wei, Maocai Hao, Junhong Liu, Meifeng Yang, Lun Xie, Yunlong Wang, Xiuzhang Li, Zijiong Su, Yuling Hu, Zhongqiang
Journal of Alloys and Compounds2022，Vol.9157.DOI:10.1016/j.jallcom.2022.165451
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  • NSTL
  • Elsevier

High-performance self-driven photodetectors based on self-polarized Bi0.9Eu0.1FeO3/Nb-doped SrTiO(3 )p-n heterojunctions

Liu, Jun-Ming 1Wei, Maocai 2Hao, Junhong 2Liu, Meifeng 3Yang, Lun 3Xie, Yunlong 3Wang, Xiuzhang 3Li, Zijiong 2Su, Yuling 2Hu, Zhongqiang4
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作者信息

  • 1. Nanjing Univ
  • 2. Zhengzhou Univ Light Ind
  • 3. Hubei Normal Univ
  • 4. Xi An Jiao Tong Univ
  • 折叠

Abstract

Ferroelectric (FE) materials, owing to their remarkable photovoltaic effects, are one class of the most promising materials candidates for self-powered photodetectors. Here, with the pronounced rectification ratio as large as 10(3) at electric bias of & PLUSMN; 1.0 V and a low dark current of 12 pA, the self-polarized Bi0.9Eu0.1FeO3 (BEFO)/Nb-doped SrTiO3 (NSTO) p-n heterojunctions are synthesized. It is revealed that the BEFO/NSTO p-n heterojunctions achieve the excellent photovoltaic effect with a short-circuit current as high as 0.23 mu A and an open-circuit voltage of 0.41 V under the light illumination of 405 nm in wavelength and intensity of 151.7 mW/cm(2). More importantly, the built-in potential in the as-prepared heterojunctions offers the self-powered photo-detecting functionality, with the high light-on/off current ratio of 2.0 x 10(4), high responsivity of 0.64 mA/W and sensitive detectivity D* of 1.63 x 10(10) Jones, and fast response speed of 50/44 ms without external bias voltage. In particular, the super-performance with R ~ 1.97 mA/W and D*~ 5.0 x 10(10) Jones in the weak incident light intensity (1.4 mW/cm(2)) are demonstrated, better than most previously reported FE-based self-powered photodetectors. Moreover, the devices possess good ambient stability and reproducibility. This work provides a demo for optically driven high-performance electronic devices based on self-polarized ferroelectric materials. (c) 2022 Elsevier B.V. All rights reserved.

Key words

Self-polarization/P-n heterojunctions/Self-driven photodetector/High on/off ratio/Fast response

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出版年

2022
Journal of Alloys and Compounds

Journal of Alloys and Compounds

EISCI
ISSN：0925-8388
被引量9
参考文献量45
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