Multilayered PtSe2/pyramid-Si heterostructure array with light confinement effect for high-performance photodetection, image sensing and light trajectory tracking applications

Two-dimensional layered (2D) materials are currently attracting intensive research interest for high-performance photodetection and other optoelectronic applications. However, the study of device integration for multifunctional optoelectronic applications is still at a nascent stage. Here, the assem...

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Bibliographic Details
Published in:Journal of materials chemistry. C, Materials for optical and electronic devices Materials for optical and electronic devices, 2021-02, Vol.9 (8), p.2823-2832
Main Authors: Ma, Mengru, Chen, Huahan, Zhou, Kunnan, Xie, Chao, Liang, Yi, Wang, Li, Wu, Chunyan, Yang, Wenhua, Guo, Jiawen, Luo, Linbao
Format: Article
Language:English
Subjects:
Arrays
Broadband
Confinement
Heterostructures
Illumination
Light
Near infrared radiation
Optoelectronic devices
Photometers
Photovoltaic effect
Quantum efficiency
Signal monitoring
Tracking
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Summary:Two-dimensional layered (2D) materials are currently attracting intensive research interest for high-performance photodetection and other optoelectronic applications. However, the study of device integration for multifunctional optoelectronic applications is still at a nascent stage. Here, the assembly of a multilayered PtSe2/pyramid-Si heterostructure-based photodetector array consisting of 8 × 8 device units is demonstrated. Owing to the pronounced light confinement effect of the heterostructures, the devices present an prominent photovoltaic effect, which enables efficient self-driven photodetection in a broadband wavelength spectrum. The Ilight/Idark ratio, responsivity, external quantum efficiency (EQE) and specific detectivity can attain values as high as 5.51 × 106, 567 mA W−1, 87% and 1.26 × 1013 jones, respectively, upon 810 nm near-infrared (NIR) light illumination. What is more, benefiting from the large-scale homogeneous material growth technique, the photodetector array exhibits excellent uniformity and repeatability in photoresponse performance with negligible unit-to-unit variation. The above characteristics provide the photodetector array with the capability of recording a simple image produced by NIR illumination and monitoring a moving photonic signal, showing the great possibility for NIR image sensing and light trajectory tracking applications.
ISSN:2050-7526
2050-7534
DOI:10.1039/d0tc05701k