Ultrasensitive photodetectors based on graphene quantum dot-InSe mixed-dimensional van der Waals heterostructures

Song, Shuang; Qiao, Jie; Shen, Mengyan; Zhang, Guoping; Feng, Fu; Somekh, Michael G.

Abstract

Two-dimensional (2D) semiconducting materials like InSe have attracted considerable attention in the photoelectric detection field due to their outstanding properties, such as a large tunable bandgap, high carrier mobility, low electron effective mass and high absorption coefficient. In this work, a mixed-dimensional van der Waals heterostructure (MvdWH)-based photodetector combining graphene quantum dots (GQDs) with InSe was fabricated. The GQD/InSe MvdWH photodetector achieved a high responsivity of 27.48 A W−1 and a large detectivity of 1.2 × 1012 Jones at 635 nm, a sixty-fold increase compared to the pure InSe devices. The significant enhancement in photoresponsive performances can be attributed to the p-type doping effect and efficient charge transfer from GQDs to InSe. The novel 0D/2D van der Waals heterojunctions offer tremendous opportunities in high-performance photodetectors.

Citation

Song, S., Qiao, J., Shen, M., Zhang, G., Feng, F., & Somekh, M. G. (2022). Ultrasensitive photodetectors based on graphene quantum dot-InSe mixed-dimensional van der Waals heterostructures. Journal of Materials Chemistry C, 10(48), 18174-18181. https://doi.org/10.1039/d2tc03395j

• Journal Article Type: Article
• Acceptance Date: Nov 14, 2022
• Online Publication Date: Nov 16, 2022
• Publication Date: Nov 16, 2022
• Deposit Date: Jun 17, 2025
• Journal: Journal of Materials Chemistry C
• Electronic ISSN: 2050-7534
• Publisher: Royal Society of Chemistry
• Peer Reviewed: Peer Reviewed
• Volume: 10
• Issue: 48
• Pages: 18174-18181
• DOI: https://doi.org/10.1039/d2tc03395j
• Keywords: Materials Chemistry, General Chemistry
• Public URL: https://nottingham-repository.worktribe.com/output/15431949
• Publisher URL: https://pubs.rsc.org/en/content/articlelanding/2022/tc/d2tc03395j