Abstract
We report the fabrication and performance of fully transparent, organic blue light-emitting electrochemical cells (OLECs), in which both the anode and cathode are made of indium tin oxide. The active layer is a blend of polyfluorene with long and flexible alkyl side chains grafted on the 9,9 position and of a molten salt. Two identical spin-coated active layers are laminated together at high temperature to form the OLECs. The electroluminescence threshold is around 3.3 V and the light intensity exceeds 10 μW/cm2 at 5 V.
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