Two covalently linked triisopropylsilyl-ethynylated phenazinothiadiazoles were prepared through condensation of a spirocyclic and bicyclic tetraketone with 5,6-diaminobenzothiadiazole. The spirobisindene- the ethanoanthracene-based linkers render electron acceptors amorphous in thin films. optoelectronic properties non-conjugated dimers are indistinguishable from that crystalline monomer. Bulk ...

The performance of organic photovoltaic cells (OPVCs) shows a critical dependence on morphology and structure of the active layers. In small molecule donor/acceptor (D/A) cells fabrication parameters, like substrate temperature and evaporation rate, play a signifi cant role for crystallization and roughening of the fi lm. In particular, the fraction of mixed material at the interface between do...