High efficiency and low driving voltage blue/white electrophosphorescence enabled by the synergistic combination of singlet and triplet energy of bicarbazole derivatives

Xie, Yue‐Min; Cui, Lin‐Song; Zu, Fengshuo; Igbari, Femi; Xue, Miaomiao; Jiang, Zuo‐Quan; Liao, Liang‐Sheng

doi:10.1016/j.orgel.2015.07.018

Organic Electronics

2015

DOI: 10.1016/j.orgel.2015.07.018

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High efficiency and low driving voltage blue/white electrophosphorescence enabled by the synergistic combination of singlet and triplet energy of bicarbazole derivatives

Yue‐Min Xie

Lin‐Song Cui

Fengshuo Zu

et al.

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Cited by 9 publications

(1 citation statement)

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“…Based on the above factors, many different organic molecular frameworks such as carbazole, thiophene, triazine, dibenzofuran, pyridine, pyrimidine and other ligands are widely studied. [12][13][14][15] The use of these groups well matches the triplet energy of the material as well as the charge transport properties. These groups create favorable conditions for the design and development of new materials by modifying the diversity of structures present.…”

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confidence: 80%

Three Times Lifetime Improvement of Red-Emitting Organic Light-Emitting Diodes Based on Bipolar Host Material

Sun

Zhang

Xing

et al. 2018

ECS J. Solid State Sci. Technol.

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A novel bipolar material 3-phenyl-10-(4-phenylquinazolin-2-yl)-3,10-dihydropyrrolo[3,2-a]carbazole (PQCz) was successfully designed and synthesized as the host material for red phosphorescent organic light emitting diodes (PhOLEDs). In this compound carbazole derivative as the donor unit and phenylquinazolin derivative as the acceptor unit. A red electroluminescent device based on this new host material is able to achieve 23.65 cd/A current efficiency and relatively flat efficiency roll-off. The operational lifetime of the devices were monitored with an initial luminance of 1000 cd/m 2 under constant currents at room temperature. The device hosted by PQCz exhibit longer lifetimes (LT 95 ) of more than 1500 h, which is about three times longer than that in the control device using CBP as host (500 h), which is the most longest operational lifetime red PhOLED reported to date to our knowledge.

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mentioning

confidence: 80%

Three Times Lifetime Improvement of Red-Emitting Organic Light-Emitting Diodes Based on Bipolar Host Material

Sun

Zhang

Xing

et al. 2018

ECS J. Solid State Sci. Technol.

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Modulation of the Physicochemical Properties of Donor–Spiro–Acceptor Derivatives through Donor Unit Planarisation: Phenylacridine versus Indoloacridine—New Hosts for Green and Blue Phosphorescent Organic Light‐Emitting Diodes (PhOLEDs)

Thiery

Tondelier

Geffroy

et al. 2016

Chemistry A European J

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This work reports a detailed structure-property relationship study of a series of efficient host materials based on the donor-spiro-acceptor (D-spiro-A) design for green and sky-blue phosphorescent organic light-emitting diodes (PhOLEDs). The electronic and physical effects of the indoloacridine (IA) fragment connected through a spiro bridge to different acceptor units, namely, fluorene, dioxothioxanthene or diazafluorene moiety, have been investigated in depth. The resulting host materials have been easily synthesised through short, efficient, low-cost, and highly adaptable synthetic routes by using common intermediates. The dyes possess a very high triplet energy (ET ) and tuneable HOMO/LUMO levels, depending on the strength of the donor/acceptor combination. The peculiar electrochemical and optical properties of the IA moiety have been investigated though a fine comparison with their phenylacridine counterparts to study the influence of planarisation. Finally, these molecules have been incorporated as hosts in green and sky-blue PhOLEDs. For the derivative SIA-TXO2 as a host, external quantum efficiencies as high as 23 and 14 % have been obtained for green and sky-blue PhOLEDs, respectively.

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Achieving a 32% EQE solution-processed simple structure OLED via exciplex system

Kesavan

Jayakumar

Liu

et al. 2022

Chemical Engineering Journal

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High efficiency and low driving voltage blue/white electrophosphorescence enabled by the synergistic combination of singlet and triplet energy of bicarbazole derivatives

Cited by 9 publications

References 32 publications

Three Times Lifetime Improvement of Red-Emitting Organic Light-Emitting Diodes Based on Bipolar Host Material

Three Times Lifetime Improvement of Red-Emitting Organic Light-Emitting Diodes Based on Bipolar Host Material

Modulation of the Physicochemical Properties of Donor–Spiro–Acceptor Derivatives through Donor Unit Planarisation: Phenylacridine versus Indoloacridine—New Hosts for Green and Blue Phosphorescent Organic Light‐Emitting Diodes (PhOLEDs)

Achieving a 32% EQE solution-processed simple structure OLED via exciplex system

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