Flexible photodetectors are fundamental components for developing wearable systems, which can be widely used for medical detection, environmental monitoring and flexible imaging. However, compared with 3D materials, low-dimensional materials have degraded performance, a key challenge for current flexible photodetectors. Here, a high-performance broadband photodetector has been proposed and fabricated. By combining the high mobility of graphene (Gr) with the strong light–matter interactions of single-walled carbon nanotubes (SWCNTs) and molybdenum disulfide (MoS₂), the flexible photodetector exhibits a greatly improved photoresponse covering the visible to near-infrared range. Additionally, a thin layer of gadolinium iron garnet (Gd₃Fe₅O₁₂, GdlG) film is introduced to improve the interface of the double van der Waals heterojunctions to reduce the dark current. The SWCNT/GdIG/Gr/GdIG/MoS₂ flexible photodetector exhibits a high photoresponsivity of 47.375 A/W and a high detectivity of 1.952 × 10¹² Jones at 450 nm, a high photoresponsivity of 109.311 A/W and a high detectivity of 4.504 × 10¹² Jones at 1080 nm, and good mechanical stability at room temperature. This work demonstrates the good capacity of GdIG-assisted double van der Waals heterojunctions on flexible substrates and provides a new solution for constructing high-performance flexible photodetectors.

柔性光电探测器是开发可穿戴系统的基本组件，可广泛应用于医疗检测、环境监测和柔性成像。然而，与3D材料相比，低维材料的性能下降，这是当前柔性光电探测器面临的一个关键挑战。在这里，提出并制造了一种高性能宽带光电探测器。通过将石墨烯（Gr）的高迁移率与单壁碳纳米管（SWCNT）和二硫化钼（MoS2）的强光-物质相互作用相结合，柔性光电探测器在可见光到近红外范围内表现出大大改善的_光响应。此外，引入一薄层钆铁石榴石（Gd ₃ Fe ₅ O ₁₂，GdlG）薄膜来改善双范德华异质结的界面，以减少暗电流。SWCNT/GdIG/Gr/GdIG/MoS ₂柔性光电探测器在450 nm处表现出47.375 A/W的高光响应度和1.952 × 10 ¹² Jones的高检测率，在450 nm处表现出109.311 A/W的高光响应度和4.504的高检测率× 10 ¹² Jones 在 1080 nm 处，并且在室温下具有良好的机械稳定性。这项工作展示了GdIG辅助双范德华异质结在柔性基板上的良好性能，并为构建高性能柔性光电探测器提供了新的解决方案。