Polymer light-emitting electrochemical cells with ultralow salt content: performance enhancement through synergetic chemical and electrochemical doping actions

Polymer light-emitting electrochemical cells (PLECs) employing a silver trifluoromethanesulfonate (Ag triflate) salt are demonstrated. The red-emitting PLECs contained 0.2-1 wt% salt, but exhibited a peak luminance of 6000 cd m(-2), with high efficiency and minimal efficiency roll-off. Notably, the Ag triflate cells activate more than 100 times faster than an optimized reference cell containing a potassium triflate salt. The high performance of the Ag triflate PLECs can be attributed to the partial chemical doping of the light-emitting polymer by the silver cations. The synergetic action of chemical and electrochemical doping provides a new avenue to design high-performance mixed conductor devices.

Automated summary

Polymer light-emitting electrochemical cells (PLECs) using silver trifluoromethanesulfonate (Ag triflate) salt exhibit high luminance and efficiency, activating over 100 times faster than other optimized cells. The high performance is attributed to the partial chemical doping of the light-emitting polymer by silver cations, providing a new approach for designing high-performance mixed conductor devices.