| 초록 |
Interest in fluorene-based organic semiconductors has surged thanks to their ability to display high levels of (polarized) photoand electroluminescence as well as useful electronic chargetransport properties. More recently, a promising photovoltaic performance has been achieved through incorporation of such compounds in bulk-heterojunction blends. Both, oligo- and polyfluorene derivatives have been studied extensively and predominantly the latter have been found to display superior characteristics, such as significantly improved optical, electrochemical properties as well as for instance, the ability to form oriented fibers. Generally, one would expect that with increasing chain length most properties become less affected by small variations in the degree of polymerization, as indeed observed for the field-effect mobility, photoluminescence, as well as transition temperatures of various polyfluorenes. |
