Research Topics. Materials and nanomaterials capable of downconverting (e.g., UV and near UV to visible) and upconverting light (e.g., near IR to visible) are technologically relevant for applications such as displays, lasers, solid-state lighting, and optical bioimaging and biosensing. Our group is interested in establishing the crystal-chemical principles enabling the design of materials and nanomaterials with tailored photoluminescence properties. We seek to achieve this goal by exploring novel chemical compositions and through a fundamental understanding of composition-structure and structure-luminescence relationships. Three projects are the focus of our current research efforts:


Research Approach. A variety of synthetic methodologies is employed in our group, including colloidal synthesis, solvothermal syntesis, and conventional and microwave solid-state reactions. Likewise, multiple analytical techniques and data-analysis approaches are used to probe the chemical composition, morphology, structure, and luminescence of the synthesized materials; these include elemental analysis (ICP-MS, STEM/EDX), thermal analysis (TGA/DSC), electron microscopy and diffraction (TEM/SAED),  X-ray diffraction and scattering (single-crystal, powder, Rietveld/PDF), X-ray absorption (XANES/EXAFS), and fluorescence and phosphorescence (steady-state, time-dependent, variable-temperature).



Funding. NSF DMR-1606917 and Wayne State University.

I. Chemically Flexible Hosts for Upconverting

Nanocrystals.  


The goal of this project is the development of nanocrystalline chemical platforms whose composition and structure can be used as levers to control the NIR-to-visible light upconversion efficiency and chromaticity.


III. Organic-Inorganic Single-Source Precursors

Containing Halogenated Ligands.


The focus of this project is the design of hybrid organic-inorganic compounds with potential as single-source precursors for compositionally complex materials.


II. Energy Management in Thermosensitive Phosphors.


This project aims at gaining a fundamental understanding of the role of crystal-chemistry in controlling and directing the temperature-dependent flow of energy in thermosensitive phosphors.



Rabuffetti Group

 Solid State Materials and Nanomaterials


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