Curr. Appl. Phys. 2025; 70: 69-75
Published online February 28, 2025 https://doi.org/10.1016/j.cap.2024.11.014
Copyright © The Korean Physical Society.
Shin D.H.; Lee H.
Department of Smart Sensors Engineering, Andong National University, Gyeongbuk, Andong, 36729, South Korea; Department of Applied Physics, Kyung Hee University, Yongin, 17104, South Korea; Education Institute for Frontier Science and Technology (BK21 Four), Kyung Hee University, Yongin, 17104, South Korea; Institute of Natural Sciences, Kyung Hee University, Yongin, 17104, South Korea
Recently, there has been interest in developing high-performance self-driven photodetectors (PDs) using 2D-based heterostructures due to their unique optoelectronic properties. Here, we demonstrate that vertical-heterostructures based on graphene (Gr) transparent conductive electrodes, n-type 2D WS2, and p-type LaVO3 realize a broadband-responsive PD covering the wavelength range of 300–850 nm. Due to the formation of an electric field at the WS2/LaVO3 interface and the photovoltaic effect, this structure shows a rectifying operation with a maximum detectivity of 2.1 × 1010 Jones at zero bias. Additionally, it exhibits a fast fall time of 435 μs and a 3 dB bandwidth of 2300 Hz, making it suitable for high-speed self-powered optoelectronic applications. Therefore, the TETA-Gr/WS2/LaVO3 heterojunction is proposed as an excellent candidate for high-performance, self-powered, and broadband PDs. © 2024 Korean Physical Society
Keywords: Broadband, Graphene, LaVO3, Photodetector, Self-powered, WS2
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