Efficient, Color-Stable, and Long-Lived White Organic Light-Emitting Diodes Utilizing Phosphorescent Molecular Aggregates

Lydia Ameri; Linyu Cao; Xinqiang Tan; Jian Li

doi:10.1002/adma.202208361

Efficient, Color-Stable, and Long-Lived White Organic Light-Emitting Diodes Utilizing Phosphorescent Molecular Aggregates

Lydia Ameri, Linyu Cao, Xinqiang Tan, Jian Li

Engineering, Ira A. Fulton Schools of (IAFSE)

Research output: Contribution to journal › Article › peer-review

11 Scopus citations

Abstract

Highly efficient and stable single-stack hybrid white organic light-emitting diode (WOLED) devices are developed using two emissive layers: one with amber-colored phosphorescent molecular-aggregate emission from the Pd(II) complex, Pd(II) 7-(3-(pyridine-2-yl-κN)phenoxy-κC)(benzo-κC)([c]benzo[4,5]imidazo-κN)[1,2-a][1,5]naphthyridine, Pd3O8-Py5, and the other with blue fluorescence emission. An optimized device structure achieves high color stability under various current densities, an external quantum efficiency (EQE) of 45.5%, a power efficiency of 97.4 Lm W⁻¹, and an estimated LT₉₅ (operational time to 95% of the initial luminance) of 50 744 h at an initial luminance of 1000 cd m⁻².

Original language	English (US)
Article number	2208361
Journal	Advanced Materials
Volume	35
Issue number	11
DOIs	https://doi.org/10.1002/adma.202208361
State	Published - Mar 16 2023

Keywords

color stability
fluorescence
molecular aggregates
operational stability
phosphorescence
white OLEDs

ASJC Scopus subject areas

General Materials Science
Mechanics of Materials
Mechanical Engineering

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10.1002/adma.202208361

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title = "Efficient, Color-Stable, and Long-Lived White Organic Light-Emitting Diodes Utilizing Phosphorescent Molecular Aggregates",

abstract = "Highly efficient and stable single-stack hybrid white organic light-emitting diode (WOLED) devices are developed using two emissive layers: one with amber-colored phosphorescent molecular-aggregate emission from the Pd(II) complex, Pd(II) 7-(3-(pyridine-2-yl-κN)phenoxy-κC)(benzo-κC)([c]benzo[4,5]imidazo-κN)[1,2-a][1,5]naphthyridine, Pd3O8-Py5, and the other with blue fluorescence emission. An optimized device structure achieves high color stability under various current densities, an external quantum efficiency (EQE) of 45.5%, a power efficiency of 97.4 Lm W−1, and an estimated LT95 (operational time to 95% of the initial luminance) of 50 744 h at an initial luminance of 1000 cd m−2.",

keywords = "color stability, fluorescence, molecular aggregates, operational stability, phosphorescence, white OLEDs",

author = "Lydia Ameri and Linyu Cao and Xinqiang Tan and Jian Li",

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year = "2023",

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day = "16",

doi = "10.1002/adma.202208361",

language = "English (US)",

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T1 - Efficient, Color-Stable, and Long-Lived White Organic Light-Emitting Diodes Utilizing Phosphorescent Molecular Aggregates

AU - Ameri, Lydia

AU - Cao, Linyu

AU - Tan, Xinqiang

AU - Li, Jian

PY - 2023/3/16

Y1 - 2023/3/16

N2 - Highly efficient and stable single-stack hybrid white organic light-emitting diode (WOLED) devices are developed using two emissive layers: one with amber-colored phosphorescent molecular-aggregate emission from the Pd(II) complex, Pd(II) 7-(3-(pyridine-2-yl-κN)phenoxy-κC)(benzo-κC)([c]benzo[4,5]imidazo-κN)[1,2-a][1,5]naphthyridine, Pd3O8-Py5, and the other with blue fluorescence emission. An optimized device structure achieves high color stability under various current densities, an external quantum efficiency (EQE) of 45.5%, a power efficiency of 97.4 Lm W−1, and an estimated LT95 (operational time to 95% of the initial luminance) of 50 744 h at an initial luminance of 1000 cd m−2.

AB - Highly efficient and stable single-stack hybrid white organic light-emitting diode (WOLED) devices are developed using two emissive layers: one with amber-colored phosphorescent molecular-aggregate emission from the Pd(II) complex, Pd(II) 7-(3-(pyridine-2-yl-κN)phenoxy-κC)(benzo-κC)([c]benzo[4,5]imidazo-κN)[1,2-a][1,5]naphthyridine, Pd3O8-Py5, and the other with blue fluorescence emission. An optimized device structure achieves high color stability under various current densities, an external quantum efficiency (EQE) of 45.5%, a power efficiency of 97.4 Lm W−1, and an estimated LT95 (operational time to 95% of the initial luminance) of 50 744 h at an initial luminance of 1000 cd m−2.

KW - color stability

KW - fluorescence

KW - molecular aggregates

KW - operational stability

KW - phosphorescence

KW - white OLEDs

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VL - 35

JO - Advanced Materials

JF - Advanced Materials

IS - 11

M1 - 2208361

ER -

Efficient, Color-Stable, and Long-Lived White Organic Light-Emitting Diodes Utilizing Phosphorescent Molecular Aggregates

Abstract

Keywords

ASJC Scopus subject areas

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