Managing Charge and Exciton Transporting Behavior in White Organic Light-Emitting Devices for High Power Efficiency and Superior Color Stability

Qi Wang; Iain W.H. Oswald; Xiaolong Yang; Guijiang Zhou; Huiping Jia; Qiquan Qiao; Jason Hoshikawa-Halbert; Bruce E. Gnade

doi:10.1002/aelm.201400040

Managing Charge and Exciton Transporting Behavior in White Organic Light-Emitting Devices for High Power Efficiency and Superior Color Stability

Qi Wang, Iain W.H. Oswald, Xiaolong Yang, Guijiang Zhou, Huiping Jia, Qiquan Qiao, Jason Hoshikawa-Halbert, Bruce E. Gnade

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

6 Scopus citations

Abstract

An advanced device structure using doped blue dual emitting layers (EMLs) and an undoped orange EML is developed for achieving white organic light-emitting diodes. The optimized device using a single emitting species for both blue and orange emission shows a peak power efficiency of 60 lm W⁻¹ and high color stability over the entire operation process due to the aligned energy levels for facilitated charge transport. Quantitative analysis of the device working mechanism is performed to provide an explanation for the high performance of the device. It is found that both the charge and exciton transporting behavior can be finely tuned between different emitting regions, and therefore the efficiency and spectrum of the device are improved systematically.

Original language	English (US)
Article number	1400040
Journal	Advanced Electronic Materials
Volume	1
Issue number	7
DOIs	https://doi.org/10.1002/aelm.201400040
State	Published - Jul 2015
Externally published	Yes

Keywords

charge transport
organic light-emitting devices
phosphorescence
triplet exciton
white light

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials

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10.1002/aelm.201400040

Cite this

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title = "Managing Charge and Exciton Transporting Behavior in White Organic Light-Emitting Devices for High Power Efficiency and Superior Color Stability",

abstract = "An advanced device structure using doped blue dual emitting layers (EMLs) and an undoped orange EML is developed for achieving white organic light-emitting diodes. The optimized device using a single emitting species for both blue and orange emission shows a peak power efficiency of 60 lm W−1 and high color stability over the entire operation process due to the aligned energy levels for facilitated charge transport. Quantitative analysis of the device working mechanism is performed to provide an explanation for the high performance of the device. It is found that both the charge and exciton transporting behavior can be finely tuned between different emitting regions, and therefore the efficiency and spectrum of the device are improved systematically.",

keywords = "charge transport, organic light-emitting devices, phosphorescence, triplet exciton, white light",

author = "Qi Wang and Oswald, {Iain W.H.} and Xiaolong Yang and Guijiang Zhou and Huiping Jia and Qiquan Qiao and Jason Hoshikawa-Halbert and Gnade, {Bruce E.}",

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year = "2015",

month = jul,

doi = "10.1002/aelm.201400040",

language = "English (US)",

volume = "1",

journal = "Advanced Electronic Materials",

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T1 - Managing Charge and Exciton Transporting Behavior in White Organic Light-Emitting Devices for High Power Efficiency and Superior Color Stability

AU - Wang, Qi

AU - Oswald, Iain W.H.

AU - Yang, Xiaolong

AU - Zhou, Guijiang

AU - Jia, Huiping

AU - Qiao, Qiquan

AU - Hoshikawa-Halbert, Jason

AU - Gnade, Bruce E.

PY - 2015/7

Y1 - 2015/7

N2 - An advanced device structure using doped blue dual emitting layers (EMLs) and an undoped orange EML is developed for achieving white organic light-emitting diodes. The optimized device using a single emitting species for both blue and orange emission shows a peak power efficiency of 60 lm W−1 and high color stability over the entire operation process due to the aligned energy levels for facilitated charge transport. Quantitative analysis of the device working mechanism is performed to provide an explanation for the high performance of the device. It is found that both the charge and exciton transporting behavior can be finely tuned between different emitting regions, and therefore the efficiency and spectrum of the device are improved systematically.

AB - An advanced device structure using doped blue dual emitting layers (EMLs) and an undoped orange EML is developed for achieving white organic light-emitting diodes. The optimized device using a single emitting species for both blue and orange emission shows a peak power efficiency of 60 lm W−1 and high color stability over the entire operation process due to the aligned energy levels for facilitated charge transport. Quantitative analysis of the device working mechanism is performed to provide an explanation for the high performance of the device. It is found that both the charge and exciton transporting behavior can be finely tuned between different emitting regions, and therefore the efficiency and spectrum of the device are improved systematically.

KW - charge transport

KW - organic light-emitting devices

KW - phosphorescence

KW - triplet exciton

KW - white light

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Managing Charge and Exciton Transporting Behavior in White Organic Light-Emitting Devices for High Power Efficiency and Superior Color Stability

Abstract

Keywords

ASJC Scopus subject areas

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