Excitation dynamics in polyacene molecules on rare-gas clusters

Abstract

Laser-induced fluorescence spectra and excitation lifetimes of anthracene, tetracene, and pentacene molecules attached to the surface of solid argon clusters have been measured with respect to cluster size, density of molecules and excitation density. Results are compared to previous studies on the same sample molecules attached to neon clusters. A contrasting lifetime behavior of anthracene on neon and argon clusters is discussed, and mechanisms are suggested to interpret the results. Although both neon and argon clusters are considered to be weakly interacting environments, we find that the excitation decay dynamics of the studied acenes depends significantly on the cluster material. Moreover, we find even qualitative differences regarding the dependence on the dopant density. Based on these observations, previous assignments of collective radiative and non-radiative decay mechanisms are discussed in the context of the new experimental findings.

References in corpus (7)

• A real-space grid implementation of the Projector Augmented Wave method
• Morphology Effectively Controls Singlet-Triplet Exciton Relaxation and Charge Transport in Organic Semiconductors
• Polarized superradiance from delocalized exciton transitions in tetracene single crystals
• Vibronic Lineshapes of PTCDA Oligomers in Helium Nanodroplets
• Tuning nonradiative lifetimes via molecular aggregation
• Extended coherently delocalized states in a frozen Rydberg gas
• Delocalization in two and three-dimensional Rydberg gases

Cited by in corpus (2)

• Purcell-induced suppression of superradiance for molecular overlayers on noble atom surfaces
• Non-adiabatic electronic relaxation of tetracene from its brightest singlet excited state