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Issue 10, 2008
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Self-assembly of discotic molecules into mesoscopic crystals by solvent-vapour annealing

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Abstract

Solvent vapour annealing (SVA) is used to control the reorganization of ultrathin films of three different polycyclic aromatic hydrocarbons self-assembled on solid surfaces. To this end, two perylene-bis(dicarboximide) (PDI) derivatives exposing branched side alkyl chains with different length and a dodecyl substituted hexa-peri-hexabenzocoronene (HBC) have been used, in view of their n- and p-type semiconducting nature. For all the three molecules, nanoscopic crystals grown from solution by spin-coating and drop-casting undergo reorganization into sub-millimetric fibers, domes and needles, proving the general applicability of the SVA method. Moreover, such an approach exhibits a mass transport of the molecules on surfaces over hundreds of microns. The self-healing of the films through SVA treatment leads to a decrease of the structural defects and an increase in the lateral size of the self-assembled domains, ultimately providing an improved 3D conjugation. Therefore the SVA can be considered an important strategy with potential to enhance the performance of macroscopic organic electronic devices.

Graphical abstract: Self-assembly of discotic molecules into mesoscopic crystals by solvent-vapour annealing

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Publication details

The article was received on 30 Apr 2008, accepted on 26 Jun 2008 and first published on 05 Aug 2008


Article type: Paper
DOI: 10.1039/B807391K
Citation: Soft Matter, 2008,4, 2064-2070
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    Self-assembly of discotic molecules into mesoscopic crystals by solvent-vapour annealing

    G. De Luca, A. Liscio, F. Nolde, L. M. Scolaro, V. Palermo, K. Müllen and P. Samorì, Soft Matter, 2008, 4, 2064
    DOI: 10.1039/B807391K

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