https://doi.org/10.1140/epjp/s13360-025-06770-7
Regular Article
Point defect improved linear and elliptical photogalvanic effects in a BSi3 photo-detector
1
College of Science, Hunan Universtiy of Science and Engineering, 425199, Yongzhou, China
2
College of Physics and Mechanical & Electrical Engineering, Jishou University, 416000, Jishou, China
a
19820170155498@stu.xmu.edu.cn
b
fxhuse@huse.edu.cn
Received:
13
April
2025
Accepted:
19
August
2025
Published online:
3
September
2025
This paper examines the linear and elliptical photogalvanic effects in a BSi3 photo-detector with the BSi3 monolayer being a silicene-like and metallic two-dimensional material, and investigates the influence of point defect in the BSi3 photo-detector and its potential applications in optoelectronic devices. Computational simulations were employed to investigate the photo-currents produced by the photogalvanic effect under various spatial structures and symmetry conditions. The results demonstrated that due to the decreasing in symmetry, typical point defects, namely vacancy and substitution doping, can produce significantly high photo-currents with the largest value as 26.6 
/photon which is enough to be experimentally detected, then robust linear and elliptical photogalvanic effects were improved by different vacancy and substitution doping cases, respectively. In addition, at different point defect situations the BSi3 photo-detector exhibited exceptional sensitivity on polarization detection which highlighted the potentials of metallic BSi3 monolayer in polarization-sensitive photo-detectors. Therefore, by elucidating the interrelationship between structure symmetry, the types of point defect and generated photo-currents, this paper broadened the application scope of BSi3 monolayer in optoelectronics and nanoelectronics and highlighted their significant values on the detection of polarization.
Xi Fu contributed equally to this work and should be considered co-first authors.
Supplementary Information The online version supplementary material available at https://doi.org/10.1140/epjp/s13360-025-06770-7.
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© The Author(s), under exclusive licence to Società Italiana di Fisica and Springer-Verlag GmbH Germany, part of Springer Nature 2025
Springer Nature or its licensor (e.g. a society or other partner) holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
