High-efficiency organic light-emitting diodes utilizing thermally activated delayed fluorescence from triazine-based donor-acceptor hybrid molecules

Sae Youn Lee; Takuma Yasuda; Hiroko Nomura; Chihaya Adachi

doi:10.1063/1.4749285

High-efficiency organic light-emitting diodes utilizing thermally activated delayed fluorescence from triazine-based donor-acceptor hybrid molecules

Sae Youn Lee, Takuma Yasuda, Hiroko Nomura, Chihaya Adachi

Department of Energy and Materials Engineering

Kyushu University

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

341 Scopus citations

Abstract

We have designed and synthesized a high-efficiency purely organic luminescent material, 2,4-bis{3-(9 H-carbazol-9-yl)-9 H-carbazol-9-yl}-6-phenyl- 1,3,5-triazine (CC2TA) comprising the bicarbazole donor and phenyltriazine acceptor units, which is capable of emitting thermally activated delayed fluorescence. The molecular design of CC2TA allows spatial separation of HOMO and LUMO on the donor and acceptor fragments, respectively, leading to an exceptionally small singlet-triplet exchange energy (ΔE _ST 0.06 eV) together with a high triplet energy. Furthermore, a high external electroluminescence quantum efficiency as high as 11 ± 1 has been achieved in the sky-blue organic light-emitting diodes employing CC2TA as an emitter.

Original language	English
Article number	093306
Journal	Applied Physics Letters
Volume	101
Issue number	9
DOIs	https://doi.org/10.1063/1.4749285
State	Published - 27 Aug 2012

Access to Document

10.1063/1.4749285

Cite this

@article{837c1784f9044495817ac849130362a6,

title = "High-efficiency organic light-emitting diodes utilizing thermally activated delayed fluorescence from triazine-based donor-acceptor hybrid molecules",

abstract = "We have designed and synthesized a high-efficiency purely organic luminescent material, 2,4-bis{3-(9 H-carbazol-9-yl)-9 H-carbazol-9-yl}-6-phenyl- 1,3,5-triazine (CC2TA) comprising the bicarbazole donor and phenyltriazine acceptor units, which is capable of emitting thermally activated delayed fluorescence. The molecular design of CC2TA allows spatial separation of HOMO and LUMO on the donor and acceptor fragments, respectively, leading to an exceptionally small singlet-triplet exchange energy (ΔE ST 0.06 eV) together with a high triplet energy. Furthermore, a high external electroluminescence quantum efficiency as high as 11 ± 1 has been achieved in the sky-blue organic light-emitting diodes employing CC2TA as an emitter.",

author = "{Youn Lee}, Sae and Takuma Yasuda and Hiroko Nomura and Chihaya Adachi",

year = "2012",

month = aug,

day = "27",

doi = "10.1063/1.4749285",

language = "English",

volume = "101",

journal = "Applied Physics Letters",

issn = "0003-6951",

publisher = "American Institute of Physics",

number = "9",

}

TY - JOUR

T1 - High-efficiency organic light-emitting diodes utilizing thermally activated delayed fluorescence from triazine-based donor-acceptor hybrid molecules

AU - Youn Lee, Sae

AU - Yasuda, Takuma

AU - Nomura, Hiroko

AU - Adachi, Chihaya

PY - 2012/8/27

Y1 - 2012/8/27

N2 - We have designed and synthesized a high-efficiency purely organic luminescent material, 2,4-bis{3-(9 H-carbazol-9-yl)-9 H-carbazol-9-yl}-6-phenyl- 1,3,5-triazine (CC2TA) comprising the bicarbazole donor and phenyltriazine acceptor units, which is capable of emitting thermally activated delayed fluorescence. The molecular design of CC2TA allows spatial separation of HOMO and LUMO on the donor and acceptor fragments, respectively, leading to an exceptionally small singlet-triplet exchange energy (ΔE ST 0.06 eV) together with a high triplet energy. Furthermore, a high external electroluminescence quantum efficiency as high as 11 ± 1 has been achieved in the sky-blue organic light-emitting diodes employing CC2TA as an emitter.

AB - We have designed and synthesized a high-efficiency purely organic luminescent material, 2,4-bis{3-(9 H-carbazol-9-yl)-9 H-carbazol-9-yl}-6-phenyl- 1,3,5-triazine (CC2TA) comprising the bicarbazole donor and phenyltriazine acceptor units, which is capable of emitting thermally activated delayed fluorescence. The molecular design of CC2TA allows spatial separation of HOMO and LUMO on the donor and acceptor fragments, respectively, leading to an exceptionally small singlet-triplet exchange energy (ΔE ST 0.06 eV) together with a high triplet energy. Furthermore, a high external electroluminescence quantum efficiency as high as 11 ± 1 has been achieved in the sky-blue organic light-emitting diodes employing CC2TA as an emitter.

UR - http://www.scopus.com/inward/record.url?scp=84865840100&partnerID=8YFLogxK

U2 - 10.1063/1.4749285

DO - 10.1063/1.4749285

M3 - Article

AN - SCOPUS:84865840100

SN - 0003-6951

VL - 101

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 9

M1 - 093306

ER -

High-efficiency organic light-emitting diodes utilizing thermally activated delayed fluorescence from triazine-based donor-acceptor hybrid molecules

Abstract

Access to Document

Other files and links

Fingerprint

Cite this