Triethylsilylethynyl anthradithiophene

Diethyl-5,l l-bis(triethylsilylethynyl)anthradithiophene (TES-ADT-ET) was synthesized by a similar synthetic route and successfully used in bulk-heterojunction solar cells in mixture with PCBM [52]. Solvent vapor annealing of these blends leads to the formation of spherulites, which consist of a network of ADT crystallites dispersed in an amorphous matrix primarily of fullerene (Fig. 11). It was shown that the coverage of a device with spherulites directly correlates with its performance. Devices with 82% spherulite coverage reach a PCE of 1%. 

Fig. 11 2,8-Diethyl-5,ll-bis(triethylsilylethynyl)anthradithiophene (TES-ADT-ET) and optical image of its blend with PCBM used in efiScient photovoltaic devices - reproduced with permission of the American Chemical Society from [52]...

Dickey KC, Smith TJ, Stevenson KJ, Subramanian S, Anthony JE, Loo YL (2007) Establishing efficient electrical contact to the weak crystals of triethylsilylethynyl anthradithiophene. Chem Mater 19 5210-5215... 

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