Influence of High Pressure on the Photoluminescence of CdSe/CdZnS Core/Shell Nanoplatelets

Colloidal nanoplatelets are promising materials with tunable narrow emission bands and large photoluminescence quantum yields. In this work we utilize high hydrostatic pressure to investigate the effects of lattice strain on the optical properties of CdSe/CdZnS core/shell nanoplatelets. This work incorporates experimental photoluminescence spectra measured in a diamond anvil cell at high hydrostatic pressure as well as comparison with theoretical models and density functional theory to investigate strain dependent bandgap shifts in colloidal nanoplatelets. This modeling allows for insight into how band structure, confinement, electrostatic effects alter the measured photoluminescence spectra.