Zachary Piontkowski

TL;DR: It is shown that a PLQY up to 79% and linewidth of 20 nm can be reached by controlling crystal rigidity and electron–phonon interactions, and that molecular motion is slowest, and rigidity greatest, in the brightest emitter.

TL;DR: It is demonstrated that rapid photodegradation arises from edge-initiated photooxidation, wherein oxidative attack is powered by photogenerated and electrically-injected carriers that diffuse to the nanoplatelet edges and produce superoxide.

TL;DR: The results demonstrate that donor-bridge dye sensitizers utilizing thiophene bridges should facilitate strong donor-acceptor coupling by an ultrafast and stabilizing coplanarization mechanism in S1, potentially increasing the electron transfer efficiency.

TL;DR: In this article , the authors demonstrate the localized vibrational response of interfaces in strontium titanate-calcium titanate superlattices by combining advanced scanning transmission electron microscopy imaging and spectroscopy, density functional theory calculations and ultrafast optical spectroscopic.

TL;DR: To understand the nature of the internal conversion process that controls the activity of the dyes, femtosecond transient absorption experiments were performed on a series of S-, Se-, and Te-substituted CGPM dyes and theinternal conversion is determined to occur by twisting of the pyrylium rings about the monomethine bridge.