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CPP: Fachverband Chemische Physik und Polymerphysik

CPP 24: Poster: Organic Semiconductors

CPP 24.25: Poster

Mittwoch, 28. März 2012, 11:00–13:00, Poster A

Influence of the treatment of organic films on the blinking dynamics of embedded inorganic QDots — •Ines Trenkmann¹, Harald Graaf², and Christian von Borczyskowski¹ — ¹Chemnitz University of Technology, Institute of Physics, Germany — ²Kassel University, Institute of Chemistry and Center for Interdisciplinary Nanostructure Science and Technology, Germany

The possibility of tailoring properties of hybrid optoelectronic devices, such as light-emitting devices, by embedding inorganic quantum dots (QDots) in organic materials arouse more and more interest in the last years. Mainly the modification of optical properties of QDots due to interactions with the surrounding organic matrix is studied at the ensemble level.

At the same time, single particle studies of QDots reveal fluctuations of the emission intensity. This fluorescence intermittency, mostly denoted as blinking, is commonly explained by trapping of generated charges in the QDots shell and/or surrounding [1]. Only a few studies have analyzed the influence of an organic matrix on the optical properties of single inorganic QDots [2].

In this contribution, we show the variation of the optical properties of CdSe/ZnS-QDots embedded in thin TPD films. Thereby the focus lies on the influence of the film treatment on the blinking dynamics of single QDots and possible effects on the analytics of hybrid optoelectronic devices.

[1] C. Krasselt, et al. PCCP 2011, 13, 17084.

[2] H. Huang, et al. Nano Letters 2007, 7, 3781.