Feb 14
Chemistry Department Seminar: Mark Thompson (USC)
Professor of Chemistry
"21st Century Alchemy: Making Copper Look Like a Noble Metal"
Heavy metal containing phosphors, especially iridium-based emitters, have become the standard in high performance mobile displays and televisions. An alternative to Ir-based OLEDs is to use complexes that emit via Thermally Assisted Delayed Fluorescence (TADF). My talk will focus on the photophysical and electroluminescent properties of TADF-emitting two‑coordinate copper, silver and gold carbene complexes, i.e. (carbene)MI(donor), where the carbene acts as an acceptor and the donor is an amide or aryl group. These complexes show high phosphorescence quantum yield (FPL = 0.7 – 1.0), giving radiative lifetimes in 0.2-3 ms regime, with emission lines spanning from the violet to red. The “tuning” of emission between violet and red involves careful manipulation of the acceptor (carbene) and donor ligands to control the donor-acceptor energy difference. These photophysical properties rival those seen only for noble metal chromophores/luminophores previously.
*This seminar counts towards the chemistry major seminar attendance requirement.
from Chemistry