Predicting aromatic exciplex fluorescence emission energies

Metal-enhanced fluorescence exciplex emission.

In this letter, we report the first observation of metal-enhanced exciplex fluorescence, observed from anthracene in the presence of diethylaniline. Anthracene in the presence of diethylaniline in close proximity to Silver Island Films (SIFs) shows enhanced monomer and exciplex emission as compared to a non-silvered control sample containing no silver nanoparticles. Our findings suggest two com...

Exciplex emission in bilayer polymer light-emitting devices

Photoluminescent and electroluminescent studies of bilayer heterojunctions formed from a poly~pyridyl vinylene phenylene vinylene! ~PPyVPV! derivative and poly~vinyl carbazole! ~PVK! show an emission peak which cannot be ascribed to either the PPyVPV derivative or PVK layer. Through studies of absorption and photoluminescence excitation ~PLE! spectra we demonstrate that the additional feature r...

Exciplex mechanism of the fluorescence quenching in polar media

The formation of exciplexes ( non-emitting or poorly emitting ) is proposed as a cause of the deviations of the experimental data from the classical model of excited state electron transfer in polar solvents yielding radical ion pairs. Experimental evidences for the formation of such exciplexes are discussed. Simulation of the dependencies of the quenching rate constant vs. Gibbs energy of elec...

Organic light-emitting diodes with a spacer enhanced exciplex emission

Excitation-emission matrix fluorescence based determination of carbamate pesticides and polycyclic aromatic hydrocarbons

The ability to accurately quantitate trace pesticides and polycyclic aromatic hydrocarbons (PAHs) by excitation–emission matrix (EEM) fluorescence spectroscopy, when coupled with parallel factor analysis (PARAFAC) deconvolution of the EEM spectra, is demonstrated and discussed. Two EEM fluorometers were investigated. One fluorometer, using a cuvette cell sample holder, realized limits of detect...