| 초록 |
Solution-processing in organic optoelectronics offers new opportunities for the large-area, printed manufacturing technologies. The selection of solubilizing groups is an art of balance, as they affect molecular packing, thin-film morphology and hence device performance. In this talk, we will present a novel hybrid solubilizing block and demonstrate its effectiveness as a side-chain and impact on nanostructures in low bandgap polymer semiconductors for organic transistors and photovoltaics. We found that hybrid solubilizing blocks have a huge effect on molecular packing such as a closer π-π stacking distance (3.58 Ǻ), mixed crystallographic texture, and a lager crystalline coherence length, relative to the control polymer with a common aliphatic side-chain, which leads to a high field-effect mobility of 2.00 cm2V-1s-1. Furthermore, we studied how this hybrid solubilizing group affects phase behavior, nanostructure, and efficiency in bulk and planar heterojunction photovoltaics. |
