Low-Dimensional Metal-Organic Chalcogenolate Semiconductors
Abstract
The goal of this fundamental research effort is to discover novel photoactive metal-organic chalcogenolates (MOCs) with unusual and/or transformational capabilities. MOCs are a new class of low-dimensional excitonic semiconductors featuring strong covalent interactions between the organic and inorganic subunits Ð a unique feature among hybrid semiconductors. 2D MOCs, in particular, show all the characteristics of a ground-breaking nanomaterial: tunable band gap across the visible and deep-blue spectrum, strong exciton binding energy, bright luminescence, in-plane anisotropy, non-toxic and environmentally friendly elemental composition, low-cost and scalable synthetic pathways, and chemical robustness. MOC semiconductors have the potential to become the next widely-studied class of optoelectronic materials with technological applications in photonics, electronics, lasers, photodetectors, light-emitting devices, quantum information, and sensing. Novel low-dimensional organic silver chalcogenolate semiconductors will be synthesized from functionalized organodichalcogenide precursors in both single-crystal and thin-film form, and the resulting compounds will be studied by optical spectroscopy and X-ray crystallography. Key strategies for tuning the optical and electronic properties and for templating low-dimensional structural anisotropy include 1) functionalization of primary aromatic rings with electron donating or withdrawing groups, 2) extended pi-conjugation to induce orbital hybridization and/or formation of charge transfer complexes, 3) introduction of heteroatoms to modify ligand binding geometry, and 4) chalcogen and metal substitution.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Jul 28, 2023
- Source ID
- W911NF2310229
Entities
People
- William A. Tisdale
Organizations
- Army Contracting Command
- Massachusetts Institute of Technology
- United States Army