3D topological Dirac semimetal (ZnxCd1-x)3As2/Sb2Se3 film heterojunction for high performance visible to near-infrared photo detection

Xingchao Zhang; Xianchao Liu; Jun Wang

doi:10.1117/12.2605109

24 November 2021 3D topological Dirac semimetal (Zn_xCd_1-x)₃As₂/Sb₂Se₃ film heterojunction for high performance visible to near-infrared photo detection

Xingchao Zhang, Xianchao Liu, Jun Wang

Author Affiliations +

Proceedings Volume 12061, AOPC 2021: Infrared Device and Infrared Technology; 120610U (2021) https://doi.org/10.1117/12.2605109
Event: Applied Optics and Photonics China 2021, 2021, Beijing, China

Abstract

Three-dimensional (3D) Dirac semimetal Cd₃As₂has an important application prospect in future for broad-spectrum photodetector due to its unique topological energy-band layout and excellent optical absorption capacity. However, extremely high dark current of individual Cd₃As₂ is the key bottleneck limiting its photoelectric detection performance. Herein, the strategies of Zn element doping and construction hetero-structure with Sb₂Se₃ are co-adopted for maximize the performance of Cd₃As₂ based device. The constructed 3D Dirac semimetal (Zn_xCd_1-x)₃As₂/Sb₂Se₃ film heterojunction photodetector prototype has efficiently achieve broad-spectra photoelectric detection from visible (450 nm) to nearinfrared region (1550 nm) wavebands at room temperature with superior performance, including high responsivity (Ri), detectivity (D*) as well as outstanding fast response time (τ). The excellent performance of the device may be attributed to high-quality of hetero-structure interface, strong light absorption capacity and suppressed dark current in (Zn_xCd_1-x)₃As₂/Sb₂Se₃ heterojunction system. This work has laid a solid foundation for the construction of a high-performance new topological semi-metal photodetector.

Citation Download Citation

Xingchao Zhang, Xianchao Liu, and Jun Wang "3D topological Dirac semimetal (Zn_xCd_1-x)₃As₂/Sb₂Se₃ film heterojunction for high performance visible to near-infrared photo detection", Proc. SPIE 12061, AOPC 2021: Infrared Device and Infrared Technology, 120610U (24 November 2021); https://doi.org/10.1117/12.2605109

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KEYWORDS

Zinc

Heterojunctions

Cadmium

Photodetectors

Metalloids

Antimony

Scanning electron microscopy

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