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Light‐emitting electrochemical cells (LECs) based on ionic transition‐metal complexes operate with air‐stable electrodes and are prepared using solution‐based technologies. The presence of ions facilitates the formation of doped regions close to the electrodes, which reduces the barriers for electron and hole injection but also leads to exciton quenching. H. J. Bolink and co‐workers demon‐strate on page 897...
In this work we show that solution‐processed light‐emitting electrochemical cells (LECs) based on only an ionic iridium complex and a small amount of ionic liquid exhibit exceptionally good performances when applying a pulsed current: sub‐second turn‐on times and almost constant high luminances (>600 cd m−2) and power efficiencies over the first 600 h. This demonstrates the potential of LECs for...
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