Mixed-host engineering of blue thermally activated delayed fluorescence devices for enhanced efficiency and suppressed efficiency roll-off

Soo Jong Park; Kwang Wook Choi; Young Wook Park; Byeong Kwon Ju

doi:10.1016/j.optmat.2021.110879

Mixed-host engineering of blue thermally activated delayed fluorescence devices for enhanced efficiency and suppressed efficiency roll-off

Soo Jong Park, Kwang Wook Choi, Young Wook Park, Byeong Kwon Ju

School of Electrical Engineering

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

3 Citations (Scopus)

Abstract

Blue thermally activated delayed fluorescence (TADF) organic light-emitting diodes (OLEDs) with enhanced efficiency and suppressed efficiency roll-offs were fabricated using a mixed host consisting of 3,3-di(9H-carbazol-9-yl)-biphenyl (mCBP) and bis[2-(diphenyl-phosphino)phenyl]ether oxide (DPEPO). Notably, mCBP and DPEPO, which are generally used as hosts in blue TADF OLEDs, exhibit material stability and efficiency as their trade-off characteristics. The mixed-host structure, when applied to 10,10′-(4,4′-sulfonylbis(4,1-phenylene))bis(9,9-dimethyl-9,10-dihydroacridine), which is a blue TADF dopant, facilitated a maximum efficiency of 18.1%. Furthermore, the critical current density (J₀), at which the external quantum efficiency decreases by half of its maximum value, was observed to be 3.9 times that of the DPEPO device.

Original language	English
Article number	110879
Journal	Optical Materials
Volume	113
DOIs	https://doi.org/10.1016/j.optmat.2021.110879
Publication status	Published - 2021 Mar

Keywords

Blue organic light-emitting diodes (OLEDs)
Capacitance–voltage
Mixed-host
Recombination zone
Thermally activated delayed fluorescence (TADF)

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Computer Science(all)
Atomic and Molecular Physics, and Optics
Spectroscopy
Physical and Theoretical Chemistry
Organic Chemistry
Inorganic Chemistry
Electrical and Electronic Engineering

Access to Document

10.1016/j.optmat.2021.110879

Cite this

@article{226bc8bad6ac4fc6816f746cec0d1feb,

title = "Mixed-host engineering of blue thermally activated delayed fluorescence devices for enhanced efficiency and suppressed efficiency roll-off",

abstract = "Blue thermally activated delayed fluorescence (TADF) organic light-emitting diodes (OLEDs) with enhanced efficiency and suppressed efficiency roll-offs were fabricated using a mixed host consisting of 3,3-di(9H-carbazol-9-yl)-biphenyl (mCBP) and bis[2-(diphenyl-phosphino)phenyl]ether oxide (DPEPO). Notably, mCBP and DPEPO, which are generally used as hosts in blue TADF OLEDs, exhibit material stability and efficiency as their trade-off characteristics. The mixed-host structure, when applied to 10,10′-(4,4′-sulfonylbis(4,1-phenylene))bis(9,9-dimethyl-9,10-dihydroacridine), which is a blue TADF dopant, facilitated a maximum efficiency of 18.1%. Furthermore, the critical current density (J0), at which the external quantum efficiency decreases by half of its maximum value, was observed to be 3.9 times that of the DPEPO device.",

keywords = "Blue organic light-emitting diodes (OLEDs), Capacitance–voltage, Mixed-host, Recombination zone, Thermally activated delayed fluorescence (TADF)",

author = "Park, {Soo Jong} and Choi, {Kwang Wook} and Park, {Young Wook} and Ju, {Byeong Kwon}",

note = "Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korean Government (MSIT) (No. 2019R1A2B5B01070286 , No. 2020R1C1C1013567 ) and the Brain Korea 21 Plus Project in 2020 . Publisher Copyright: {\textcopyright} 2021 Elsevier B.V.",

year = "2021",

month = mar,

doi = "10.1016/j.optmat.2021.110879",

language = "English",

volume = "113",

journal = "Optical Materials",

issn = "0925-3467",

publisher = "Elsevier",

}

TY - JOUR

T1 - Mixed-host engineering of blue thermally activated delayed fluorescence devices for enhanced efficiency and suppressed efficiency roll-off

AU - Park, Soo Jong

AU - Choi, Kwang Wook

AU - Park, Young Wook

AU - Ju, Byeong Kwon

N1 - Funding Information: This work was supported by the National Research Foundation of Korea (NRF) grant funded by the Korean Government (MSIT) (No. 2019R1A2B5B01070286 , No. 2020R1C1C1013567 ) and the Brain Korea 21 Plus Project in 2020 . Publisher Copyright: © 2021 Elsevier B.V.

PY - 2021/3

Y1 - 2021/3

N2 - Blue thermally activated delayed fluorescence (TADF) organic light-emitting diodes (OLEDs) with enhanced efficiency and suppressed efficiency roll-offs were fabricated using a mixed host consisting of 3,3-di(9H-carbazol-9-yl)-biphenyl (mCBP) and bis[2-(diphenyl-phosphino)phenyl]ether oxide (DPEPO). Notably, mCBP and DPEPO, which are generally used as hosts in blue TADF OLEDs, exhibit material stability and efficiency as their trade-off characteristics. The mixed-host structure, when applied to 10,10′-(4,4′-sulfonylbis(4,1-phenylene))bis(9,9-dimethyl-9,10-dihydroacridine), which is a blue TADF dopant, facilitated a maximum efficiency of 18.1%. Furthermore, the critical current density (J0), at which the external quantum efficiency decreases by half of its maximum value, was observed to be 3.9 times that of the DPEPO device.

AB - Blue thermally activated delayed fluorescence (TADF) organic light-emitting diodes (OLEDs) with enhanced efficiency and suppressed efficiency roll-offs were fabricated using a mixed host consisting of 3,3-di(9H-carbazol-9-yl)-biphenyl (mCBP) and bis[2-(diphenyl-phosphino)phenyl]ether oxide (DPEPO). Notably, mCBP and DPEPO, which are generally used as hosts in blue TADF OLEDs, exhibit material stability and efficiency as their trade-off characteristics. The mixed-host structure, when applied to 10,10′-(4,4′-sulfonylbis(4,1-phenylene))bis(9,9-dimethyl-9,10-dihydroacridine), which is a blue TADF dopant, facilitated a maximum efficiency of 18.1%. Furthermore, the critical current density (J0), at which the external quantum efficiency decreases by half of its maximum value, was observed to be 3.9 times that of the DPEPO device.

KW - Blue organic light-emitting diodes (OLEDs)

KW - Capacitance–voltage

KW - Mixed-host

KW - Recombination zone

KW - Thermally activated delayed fluorescence (TADF)

UR - http://www.scopus.com/inward/record.url?scp=85100398668&partnerID=8YFLogxK

U2 - 10.1016/j.optmat.2021.110879

DO - 10.1016/j.optmat.2021.110879

M3 - Article

AN - SCOPUS:85100398668

SN - 0925-3467

VL - 113

JO - Optical Materials

JF - Optical Materials

M1 - 110879

ER -

Mixed-host engineering of blue thermally activated delayed fluorescence devices for enhanced efficiency and suppressed efficiency roll-off

Abstract

Keywords

ASJC Scopus subject areas

Access to Document

Other files and links

Fingerprint

Cite this