Scalable Low-Dimensional Laser-Induced Graphene Heterostructure for Wearable IR/NIR Photodetectors

The development of effective and wearable photodetectors for infrared (IR) and near-infrared (NIR) applications is essential for advancing continuous health monitoring technologies such as functional near-infrared spectroscopy (fNIRS) systems. Current wearable IR sensor solutions, however, often struggle with integration to novel devices due to bulkiness, and rigidity. In this study, we explore the optimization of fabrication parameters and device architecture to maximize photoresponse of low-dimensional semiconductor based photodetectors. We investigate the photoresponse of heterostructures formed between laser-induced graphene (LIG) and low-dimensional semiconductors. Through systematic experimentation, this research seeks to capitalize on the exceptional carrier mobility and broadband IR absorption characteristics of low-dimensional materials and identify the optimal material parameters and device architecture to enhance the IR/NIR photoresponse of sensors while maintaining the flexibility and durability required for wearable applications. This work will not only contribute to the understanding of 2D material-based photodetectors but also pave the way for innovative, accessible, and practical continuous health monitoring solutions for everyday use. Additionally, the scalability and low-cost factors of the explored sensor designs offer considerable potential for commercialization in medical technology and in fields requiring subtle environmental interaction and hazard detection.