ABSTRACT
In order to shed light on these elem entary interaction processes, we study the effect of N,N'-diphenyl-N,N'-bis(3m ethylphenyl)-(1,1'-biphenyl)-4,4'-diam ine (TPD), which is an often used and well-studied organic hole transporting material, and pyridyl-substituted porphyrin dye molecules on CdSe/ZnS core/shell quantum dots (QDs) by steady-state and time-resolved PL spectroscopy. We use the well-established Stern-Volmer formalism to analyze static and dynamic quenching processes and compare, reported here for the first time and thus extending the limits of ensemble experiments, their relative contributions with respect to PL quenching o f QDs.
