Synergistic-potential engineering enables high-efficiency graphene photodetectors for near- to mid-infrared light

Synergistic-potential engineering enables high-efficiency graphene photodetectors for near- to mid-infrared light

Nature Communications

10.1038/s41467-024-45498-3

http://dx.doi.org/10.1038/s41467-024-45498-3

Hao Jiang, Jintao Fu, Jingxuan Wei, Shaojuan Li, Changbin Nie, Feiying Sun, Qing Yang Steve Wu, Mingxiu Liu, Zhaogang Dong, Xingzhan Wei, Weibo Gao, Cheng-Wei Qiu

09 February 2024

Jiang, H., Fu, J., Wei, J., Li, S., Nie, C., Sun, F., Wu, Q. Y. S., Liu, M., Dong, Z., Wei, X., Gao, W., & Qiu, C.-W. (2024). Synergistic-potential engineering enables high-efficiency graphene photodetectors for near- to mid-infrared light. Nature Communications, 15(1). https://doi.org/10.1038/s41467-024-45498-3

AbstractHigh quantum efficiency and wide-band detection capability are the major thrusts of infrared sensing technology. However, bulk materials with high efficiency have consistently encountered challenges in integration and operational complexity. Meanwhile, two-dimensional (2D) semimetal materials with unique zero-bandgap structures are constrained by the bottleneck of intrinsic quantum efficiency. Here, we report a near-mid infrared ultra-miniaturized graphene photodetector with configurable 2D potential well. The 2D potential well constructed by dielectric structures can spatially (laterally and vertically) produce a strong trapping force on the photogenerated carriers in graphene and inhibit their recombination, thereby improving the external quantum efficiency (EQE) and photogain of the device with wavelength-immunity, which enable a high responsivity of 0.2 A/W–38 A/W across a broad infrared detection band from 1.55 to 11 µm. Thereafter, a room-temperature detectivity approaching 1 × 109 cm Hz1/2 W−1 is obtained under blackbody radiation. Furthermore, a synergistic effect of electric and light field in the 2D potential well enables high-efficiency polarization-sensitive detection at tunable wavelengths. Our strategy opens up alternative possibilities for easy fabrication, high-performance and multifunctional infrared photodetectors.

Attribution 4.0 International (CC BY 4.0)

This research / project is supported by the National Research Foundation, Singapore and A*STAR - Quantum Engineering Programme
Grant Reference no. : NRF2021-QEP2-03-P10

This research / project is supported by the A*STAR - AME Individual Research Grants
Grant Reference no. : A20E5c0093

This research / project is supported by the A*STAR - Career Development Award
Grant Reference no. : C210112019

This research / project is supported by the A*STAR - MTC Individual Research Grants
Grant Reference no. : M21K2c0116

This research / project is supported by the A*STAR - MTC Individual Research Grants
Grant Reference no. : M22K2c0088

This research / project is supported by the National Research Foundation, Singapore & A*STAR - Quantum Engineering Programme 2.0
Grant Reference no. : NRF2021-QEP2-03-P09

This research / project is supported by the National Research Foundation - Competitive Research Program Award
Grant Reference no. : NRF-CRP26-2021-0063

This work was supported by the National Key R&D Program of China (2017YFE0131900), the Natural Science Foundation of Chongqing, China (cstc2019jcyjjqX0017), National Natural Science Foundation of China (Nos. 62121005, 62022081 and 61974099), Changchun Key Research and Development Program (21ZY03).

https://oar.a-star.edu.sg/communities-collections/articles/19811

2041-1723

Institute of Materials Research and Engineering

https://doi.org/10.1038/s41467-024-45498-3