Efficient excimer-based white OLEDs with reduced efficiency roll-off

Jiang Wu, Lydia Ameri, Linyu Cao, Jian Li

Research output: Contribution to journalArticlepeer-review

Abstract

A tetradentate Pt(II) complex, Pt2O2-p2m, which exhibits both efficient monomer and excimer emission, was synthesized. Through rational device design to broaden the recombination zone, an OLED device employing Pt2O2-p2m demonstrated an impressively high peak external quantum efficiency (EQE) of 21.5% and a warm white emission with a color rendering index of 71 and Commission Internationale de L'Eclairage coordinates of (0.409, 0.458). Moreover, a reduced efficiency roll-off was also observed to retain high EQE values of 20% EQE at 1000 cd/m2 and 17% EQE at 5000 cd/m2, and an LT70 (time to 70% initial luminance) was estimated to be over 150 h at 1000 cd/m2 under constant operation at accelerated driving conditions.

Original languageEnglish (US)
JournalApplied Physics Letters
Volume118
Issue number7
DOIs
StatePublished - Feb 15 2021

ASJC Scopus subject areas

  • Physics and Astronomy (miscellaneous)

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