Dresden 2017 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 60: Organic Electronics and Photovoltaics IV: OPV

HL 60.11: Talk

Wednesday, March 22, 2017, 18:00–18:15, ZEU 260

Bicontinuous Morphologies in Ternary Blends of Molecular Glasses — •Michael Grimann, Evgeny Tatarov, and Thomas Fuhrmann-Lieker — University of Kassel, Institute of Chemistry and Center for Interdisciplinary Nanostructure Science and Technology, 34109 Kassel, Germany

We demonstrate nanoscale phase separated morphologies in organic functional materials. These glassy compounds comprise structural motifs known from OLED or organic laser materials like oligophenyls and triarylamines as electron donors. We developed electron acceptors containing perfluorinated aromatic moieties which lead to a miscibility gap with the respective donors. Binary blends thereof undergo phase separation via spinodal decomposition in equichoric compositions. Kinetics of this demixing process can be significantly slowed by addition of especially designed surfactant-like bipolar materials. The resulting bicontinuous morphologies of tuneable scale are useful for future random lasing and photovoltaic applications.