Structural details and digital memory performances of difluorene-containing diblock copolymers in nanoscale thin films

Amphiphilic diblock copolymers bearing rigid difluorene moiety were synthesized, which revealed high thermal stability and excellent processibility. The immiscibility between the blocks induced the formation of nanostructures significantly different from those observed among common diblock copolymers. The thin film morphology parameters were investigated by synchrotron grazing incidence X-ray scattering. The morphologies were found to make influences on the electrical memory performances, in particular, the switching-ON voltage, of the polymers. Overall, the diblock copolymer films demonstrated excellent p-type unipolar permanent digital memory behaviors.