Multiresponsive optoelectronic devices based on multicomponent transition metal dichalcogenide networks

MODERN will offer a highly skilled young researcher with a PhD in chemistry and an outstanding track record a top-quality training through research in the cross-disciplinary, supra-sectoral field of printed multifunctional 2D semiconductors. Transition metal dichalcogenides (TMDs) are revolutionary 2D materials with ultrathin thicknesses and intriguing optoelectronic properties, which are promising alternatives to Si technologies for miniaturized devices thereby extending Moore’s law. TMD inks can be printed into large-area thin films, yet comprising vdW gaps and random defects which significantly hinder charge transport. While molecular functionalization can improve charge transport, most studies focused on single-component TMDs or molecules with a single functionality, missing the potential of supramolecular chemistry to engineer the performance and functionalities of next-generation optoelectronic devices based on 2D materials. MODERN aims to develop covalently linked multicomponent TMD networks with adjustable properties and enhanced performance by molecular engineering for multi-responsive optoelectronic devices. These networks with tunable components, including transition metal disulfides, diselenides, and ditellurides, will be fabricated by covalently linking solution-processed TMD nanosheets in thin films via defect engineering to passivate defects and improve charge transport. Further chemical functionalization with selected functional molecules responding to external stimuli will add responsive capabilities to the multicomponent TMD networks. Photoswitchable optoelectronic devices with enhanced charge transport and switchable photoresponsiveness will be fabricated (responsive transistors, multi-level memories). MODERN will promote the practical application of molecularly functionalized TMD networks in miniaturized optoelectronic devices. MODERN’s ultimate goal is to prepare the fellow for a leadership position in academia or industry in Europe.