Tetraphenylborate versus tetraimidazolylborate as counterions for cationic iridium(iii) complexes: enhanced electrochemical stabilities and electroluminescence†
Tetraimidazolylborate is first used as the counterion of two novel ionic iridium complexes, instead of tetraphenylborate. Both the electrochemical stabilities and electroluminescence are sharply improved. Organic light-emitting diodes have been successfully fabricated with a high current efficiency of 9.48 cd A−1 and a maximum brightness of 5163 cd m−2.
- This article is part of the themed collection: Luminescent Complexes and Materials for Light-Emitting Devices