MRS Meetings and Events


EL17.04.07 2023 MRS Spring Meeting

Tuning Phonon Energies in Nanocrystals for Enhanced Nonlinearity and Upconversion

When and Where

Apr 12, 2023
11:00am - 11:15am

Moscone West, Level 3, Room 3006



Emory Chan1,Artiom Skripka1,Zhuolei Zhang1

Lawrence Berkeley National Laboratory1


Emory Chan1,Artiom Skripka1,Zhuolei Zhang1

Lawrence Berkeley National Laboratory1
Optical applications of lanthanide-doped nanoparticles require materials with low phonon energies to minimize nonradiative relaxation and promote nonlinear processes like upconversion. Heavy halide hosts offer low phonon energies but are challenging to synthesize as nanocrystals. Here, we demonstrate size-controlled synthesis of low-phonon-energy potassium lead halide nanoparticles and the ability to tune nanocrystal phonon energies. These nanoparticles are moisture resistant and can be efficiently doped with lighter lanthanides. The low phonon energies of these nanoparticles promote upconversion emission from higher lanthanide excited states and enable highly nonlinear, avalanche-like emission when doped with neodymium ions. The realization of nanoparticles with tunable, ultra-low phonon energies facilitates the discovery of nanomaterials with phonon-dependent properties, precisely engineered for applications in nanoscale imaging, sensing, luminescence thermometry and energy conversion.



Symposium Organizers

Himchan Cho, Korea Advanced Institute of Science and Technology
Tae-Hee Han, Hanyang University
Lina Quan, Virginia Institute of Technology
Barry Rand, Princeton University

Symposium Support


Publishing Alliance

MRS publishes with Springer Nature