Energy transfer tailoring in conjugated molecular architectures

In alpha- sexithienyl (T-6) molecular thin films the spectral features of p hotoluminescence can be correlated to precise structural topologies and the nature of photoluminescence can be controlled. AFM images show that the to pological features of T-6 films evolve progressively from 2D to 3D structur es with film thickness. It is shown that coalescence between different doma ins results in photoluminescence spectra that are dominated by the by the a ggregate emission. The Figure shows the photoluminescence spectra of submon olayer and lamellae architectures.