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Influence of C-60 co-deposition on the growth kinetics of diindenoperylene-From rapid roughening to layer-by-layer growth in blended organic films

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LORCH C. NOVÁK Jiří BANERJEE R. WEIMER S. DIETERLE J. FRANK C. HINDERHOFER A. GERLACH A. CARLA F. SCHREIBER F.

Rok publikování 2017
Druh Článek v odborném periodiku
Časopis / Zdroj Journal of Chemical Physics
Fakulta / Pracoviště MU

Přírodovědecká fakulta

Citace
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Doi http://dx.doi.org/10.1063/1.4966583
Obor Fyzika pevných látek a magnetismus
Klíčová slova thin film growth; organic semiconductors; crystallinity; temperature dependence; blends; mixing; diindenoperylene; buckminsterfullerene; x-ray scattering
Popis We investigated the growth of the two phase-separating materials diindenoperylene (DIP) and buckminsterfullerene C-60 with different mixing ratio in real-time and in situ by X-ray scattering experiments. We found that at room temperature, mixtures with an excess of DIP show a growth mode which is very close to the perfect layer-by-layer limit with DIP crystallites forming over the entire film thickness. An unexpected increase in the island size is observed for these mixtures as a function of film thickness. On the other hand, equimolar and C-60 dominated mixtures grow with poor crystallinity but form very smooth films. Additionally, it is observed that higher substrate temperatures lead to an increase in the length scale of phase separation with film thickness.
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