Details

Autor(en) / Beteiligte

• Ribič, Primož Rebernik
• Bratina, Gvido

Titel

Ripening of Rubrene Islands

Ist Teil von

• Journal of physical chemistry. C, 2007-12, Vol.111 (50), p.18558-18562

Ort / Verlag

American Chemical Society

Erscheinungsjahr

2007

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• We investigate the time evolution of morphology of thin rubrene films on sapphire surfaces using atomic force microscopy. The results show that after deposition of rubrene has stopped the density of rubrene islands decreases with time while the average island size increases. In addition, the process of island ripening is strongly temperature dependent. At 50 °C, we observe a time dependence of the island density that is consistent with the existence of a kinetic surface barrier for the molecules to detach from the islands. The experimental data indicate that, at room temperature, defects on the sapphire surface play a dominant role in the process of rubrene island ripening.