Fabrication of high-performance flexible photodetectors based on Zn-doped MoS2/graphene hybrid fibers

Abstract

Two-dimensional (2D) materials, including graphene and transition metal dichalcogenides (TMDs) such as molybdenum disulfide (MoS₂) and tungsten diselenide (WSe₂), have recently attracted attention due to their applicability as building blocks for fabricating advanced functional materials. In this study, a novel method for synthesizing hybrid materials based on flexible graphene fibers and 2D TMD nanosheets was demonstrated by using chemical vapor deposition. An organic promoter layer was employed for the large-scale growth of the TMD sheet, and the subsequent metalation process of the promoter layer was carried out to modulate the electrical properties of the TMD layers on graphene fibers. As a proof of concept, fiber-type photodetectors based on graphene fibers and 2D TMD nanosheets were successfully fabricated and investigated; they showed a high photoresponsivity of 5.73 A W⁻¹. Our novel approach is a promising effective method for the fabrication of fiber-type photodetectors with a new structure for application in TMD-based transparent and flexible optoelectronic devices.