Berlin 2005 – scientific programme

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SYOO: Organic Optoelectronics and Photonics

SYOO 6: Poster

SYOO 6.48: Poster

Monday, March 7, 2005, 18:00–20:00, Poster TU A

Structure, growth and optical properties of perylene films on glass and Si substrates — •Maryam Beigmohamdi, Phenwisa Niyamakom, Dorothea Brueggemann, Stefan Kremers, and Matthias Wuttig — I.Physikalisches Institut, RWTH-Aacen

Organic films hold considerable promise for opto-electronic applications. We have deposited perylene films with different rate and thickness on glass and silicon substrates by thermal evaporation. XRD reveals that the films have a pronounced texture. Using surfaces coated by selfassembled monolayers, the texture can be modified considerably. AFM shows a pronounced dependence of the grain size and defect density as a function of film thickness and deposition rate. Strategies to deposit films with a low defect concentration will be discussed. Finally we have investigated optical properties as well as vibrational properties by a combination of spectroscopic ellipsometry, UV-VIS spectroscopy and FTIR. These investigations clearly demonstrate the pronounced anisotropy of the optical and vibrational properties, in line with the observed film texture.