Low-bias visible photodetection realized by graphite nanostructures grown on silicon nanoporous pillar array
- 22 Downloads
A graphite nanostructure (nano-graphite) with the morphology of nanoparticles and nanowires which are composed of graphite nanocrystallites (nc-graphite) was grown on silicon nanoporous pillar array (Si-NPA) by a simple chemical vapor deposition method. The structural characterizations disclosed a complex interface configuration made of nc-graphite, nc-Ni (pre-deposited on Si-NPA as catalyst for nc-graphite growth), nc-NiO2, and nc-Si. The designed nano-graphite/Si-NPA exhibits strong light absorption and sensitive photoresponsivity under low-bias potential in the visible region of 400–800 nm. For example, it shows a switching ratio of 75, a photoresponsivity of ~ 0.16 AW−1 and a rise/fall time of 12.24/5.66 s with an ultralow bias of 0.1 mV under the visible illumination of 5 mWcm−2. The high switching ratio and responsivity were ascribed to the complexity of the interface nanostructures and the formation of a thick and compact graphite nanofilm. The results illustrate that nano-graphite/Si-NPA might be a promising candidate material for fabricating high-performance low-power Si-based visible photodetectors.
KeywordsGraphite Visible photodetector Absorption Photoconductors Composite nanostructures
The work was supported by the National Natural Science Foundation of China (61774136).
Compliance with ethical standards
Conflict of interest
The authors declare that they have no conflict of interest.
- Fu WB, Zhao EB, Ren XL, Magasinski A, Yushin G (2018) Hierarchical fabric decorated with carbon nanowire/metal oxide nanocomposites for 1.6 V wearable aqueous supercapacitors. Adv energy mater. Adv Energy Mater 1703454Google Scholar