Critical importance of the hole-transporter and emission layer interface for prolonging lifetime in a phosphor-sensitized hyper-OLED based on an MR-TADF emitter

A green hyper OLED with CIE (0.31, 0.66), 159.9 lm W −1 , and LT 95/90 lifetimes of 600/2400 hours at 1000 cd m −2 was developed by preventing carrier trapping with MR-TADF emitter at hole-transporter/emission layer interface.