Efficient and stable single-doped white OLEDs using a palladium-based phosphorescent excimer

Fleetham, Tyler; Ji, Yunlong; Huang, Liang; Fleetham, Trenten S.; Li, Jian

doi:10.1039/c7sc02512b

Title: Efficient and stable single-doped white OLEDs using a palladium-based phosphorescent excimer

Journal Article · 11 September 2017 · Chemical Science

DOI: https://doi.org/10.1039/c7sc02512b · OSTI ID:1409481

Fleetham, Tyler ^[1]; Ji, Yunlong ^[1]; Huang, Liang ^[1]; Fleetham, Trenten S. ^[1];

^[1]

Arizona State Univ., Tempe, AZ (United States)

A tetradentate Pd(II) complex, Pd3O3, which exhibits highly efficient excimer emission is synthesized and characterized. Pd3O3 can achieve blue emission despite using phenyl-pyridine emissive ligands which have been a mainstay of stable green and red phosphorescent emitter designs, making Pd3O3 a good candidate for stable blue or white OLEDs. Pd3O3 exhibits strong and efficient phosphorescent excimer emission expanding the excimer based white OLEDs beyond the sole class of Pt complexes. Devices of Pd3O3 demonstrate peak external quantum efficiencies as high as 24.2% and power efficiencies of 67.9 Lm per W for warm white devices. Furthermore, Pd3O3 devices in a carefully designed stable structure achieved a device operational lifetime of nearly 3000 h at 1000 cd m^–2 without any outcoupling enhancement while simultaneously achieving peak external quantum efficiencies of 27.3% and power efficiencies over 81 Lm per W.

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Research Organization:: Univ. of Arizona, Tucson, AZ (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: EE0007090

OSTI ID:: 1409481

Alternate ID(s):: OSTI ID: 1506453

Journal Information:: Chemical Science, Vol. 8, Issue 12; ISSN 2041-6520

Publisher:: Royal Society of ChemistryCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 43 works

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