Direct probing of a polymer electrolyte/luminescent conjugated polymer mixed ionic/electronic conductor.
What will happen if one brings two metallic probes into direct contact with a polymer film and apply a voltage bias? We demonstrate that, for a mixed ionic/electronic conductor containing a luminescent conjugated polymer and a polymer electrolyte, it is possible to induce strong in situ electrochemical doping of the luminescent polymer and form a dynamic light-emitting p-n junction. Using time-lapse fluorescence imaging, we have visualized p- and n-doping of various shapes and shades, p-n junction electroluminescence, and the effects of voltage reversal. The direct probing technique offers great simplicity and versatility for studying luminescent mixed ionic/electronic conductors.
Hu
Yufeng
Y
Department of Physics, Engineering Physics and Astronomy, Queen's University, Kingston, Ontario K7L 3N6, Canada.
Gao
Jun
J