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

Wu, Jiang; Ameri, Lydia; Cao, Linyu; Li, Jian

doi:10.1063/5.0043955

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

Journal Article · Fri Feb 19 00:00:00 EST 2021 · Applied Physics Letters

DOI:https://doi.org/10.1063/5.0043955· OSTI ID:1848479

Wu, Jiang ^[1]; Ameri, Lydia ^[2]; Cao, Linyu ^[2]; ^[2]

Arizona State University, Tempe, AZ (United States). Department of Materials Science and Engineering; Arizona State Univ., Tempe, AZ (United States)
Arizona State University, Tempe, AZ (United States). Department of Materials Science and Engineering

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.

View Accepted Manuscript (DOE)

Research Organization:: Arizona State University, Tempe, AZ (United States)

Sponsoring Organization:: USDOE; USDOE Office of Energy Efficiency and Renewable Energy (EERE)

Grant/Contract Number:: EE0007090; EE0008721

OSTI ID:: 1848479

Alternate ID(s):: OSTI ID: 1766357

Journal Information:: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 7 Vol. 118; ISSN 0003-6951

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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