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Light-emitting electrochemical cells (LECs) and organic light-emitting diodes (OLEDs) have been investigated based on three blue-green-emitting cationic iridium complexes (1–3). From complexes 1 to 2 and 3, the pendant phenyl ring on the ancillary ligand is gradually fluorinated. It is found that fluorination of the pendant phenyl ring reduces the electrochemical stability of the complexes, which...
We demonstrate an efficient red emitting host-guest LEC based on cationic iridium complexes. The host-guest LEC has brightness of 8.4cdm −2 , external quantum efficiency (EQE) of up to 3.5% and peak current efficiency of 3.4cdA −1 , the highest efficiencies reported to date for red-emitting host-guest LECs based on cationic iridium complexes. It is confirmed that dispersing the guest...
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