Nanocrystal Ligands: Digging into a Messy Topic

Datum

19.08.2024

Zeit

16:30 - 17:30

Sprecher

Dr. Steven Erwin

Zugehörigkeit

US Naval Center for Materials Physics and Technology

Serie

MPI-PKS Kolloquium

Sprache

en

Hauptthema

Physik

Andere Themen

Physik

Beschreibung

Organic ligands play in important role for semiconductor nanocrystals. But they also create a number of “unintended consequences” which have received little theoretical attention. I will present very recent research by me and my colleagues at NRL to address some of these consequential but messy topics. Although our work is theoretical and computational, I will focus on the concepts and models and main results, keeping the formalism and technical details to a minimum. The most significant of these consequences concerns semiconductor nanoplatelets, atomically flat nanocrystals which emit light with high spectral purity at wavelengths controlled by their thickness. We propose and demonstrate theoretically that optical emission from nanoplatelets can be even further improved—in principle dramatically—by better design of the organic ligand layer on their surface. The full story underlying this claim will perhaps be surprising—and I hope interesting—for the diverse participants of our workshop.

Letztmalig verändert: 19.08.2024, 07:39:55