Bis(diphenyltriazine) as a new acceptor of efficient thermally activated delayed fluorescent emitters

Dong Ryun Lee; Si Hyun Han; Chil Won Lee; Jun Yeob Lee

doi:10.1016/j.dyepig.2017.12.048

Bis(diphenyltriazine) as a new acceptor of efficient thermally activated delayed fluorescent emitters

Dong Ryun Lee, Si Hyun Han, Chil Won Lee, Jun Yeob Lee

Department of Chemical Engineering

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

14 Scopus citations

Abstract

Two isomeric thermally activated delayed fluorescent (TADF) emitters, 9,9’-(2,5-bis(4,6-diphenyl-1,3,5-triazin-2-yl)-1,4-phenylene)bis(9H-carbazole) (p2Cz2Trz) and 9,9’-(4,6-bis(4,6-diphenyl-1,3,5-triazin-2-yl)-1,3-phenylene)bis(9H-carbazole) (m2Cz2Trz), were synthesized using bis(diphenyltriazine) as a new strong acceptor of the TADF emitters. The m2Cz2Trz showed smaller singlet-triplet energy gap (0.09 eV) and higher photoluminescence quantum yield (0.95) than p2Cz2Trz. As a result, the TADF devices fabricated using the m2Cz2Trz emitter exhibited high external quantum efficiency of 18.5% and small efficiency roll-off, suggesting the potential of bis(diphenyltriazine) as a new acceptor.

Original language	English
Pages (from-to)	75-80
Number of pages	6
Journal	Dyes and Pigments
Volume	151
DOIs	https://doi.org/10.1016/j.dyepig.2017.12.048
State	Published - Apr 2018

Keywords

Bistriazine
Charge transfer
Delayed fluorescence
Singlet energy
Triplet energy

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@article{1acf59506d3f4d95bdb1873e2c7e849d,

title = "Bis(diphenyltriazine) as a new acceptor of efficient thermally activated delayed fluorescent emitters",

abstract = "Two isomeric thermally activated delayed fluorescent (TADF) emitters, 9,9{\textquoteright}-(2,5-bis(4,6-diphenyl-1,3,5-triazin-2-yl)-1,4-phenylene)bis(9H-carbazole) (p2Cz2Trz) and 9,9{\textquoteright}-(4,6-bis(4,6-diphenyl-1,3,5-triazin-2-yl)-1,3-phenylene)bis(9H-carbazole) (m2Cz2Trz), were synthesized using bis(diphenyltriazine) as a new strong acceptor of the TADF emitters. The m2Cz2Trz showed smaller singlet-triplet energy gap (0.09 eV) and higher photoluminescence quantum yield (0.95) than p2Cz2Trz. As a result, the TADF devices fabricated using the m2Cz2Trz emitter exhibited high external quantum efficiency of 18.5\% and small efficiency roll-off, suggesting the potential of bis(diphenyltriazine) as a new acceptor.",

keywords = "Bistriazine, Charge transfer, Delayed fluorescence, Singlet energy, Triplet energy",

author = "Lee, \{Dong Ryun\} and Han, \{Si Hyun\} and Lee, \{Chil Won\} and Lee, \{Jun Yeob\}",

note = "Publisher Copyright: {\textcopyright} 2017 Elsevier Ltd",

year = "2018",

month = apr,

doi = "10.1016/j.dyepig.2017.12.048",

language = "English",

volume = "151",

pages = "75--80",

journal = "Dyes and Pigments",

issn = "0143-7208",

publisher = "Elsevier B.V.",

}

TY - JOUR

T1 - Bis(diphenyltriazine) as a new acceptor of efficient thermally activated delayed fluorescent emitters

AU - Lee, Dong Ryun

AU - Han, Si Hyun

AU - Lee, Chil Won

AU - Lee, Jun Yeob

PY - 2018/4

Y1 - 2018/4

N2 - Two isomeric thermally activated delayed fluorescent (TADF) emitters, 9,9’-(2,5-bis(4,6-diphenyl-1,3,5-triazin-2-yl)-1,4-phenylene)bis(9H-carbazole) (p2Cz2Trz) and 9,9’-(4,6-bis(4,6-diphenyl-1,3,5-triazin-2-yl)-1,3-phenylene)bis(9H-carbazole) (m2Cz2Trz), were synthesized using bis(diphenyltriazine) as a new strong acceptor of the TADF emitters. The m2Cz2Trz showed smaller singlet-triplet energy gap (0.09 eV) and higher photoluminescence quantum yield (0.95) than p2Cz2Trz. As a result, the TADF devices fabricated using the m2Cz2Trz emitter exhibited high external quantum efficiency of 18.5% and small efficiency roll-off, suggesting the potential of bis(diphenyltriazine) as a new acceptor.

AB - Two isomeric thermally activated delayed fluorescent (TADF) emitters, 9,9’-(2,5-bis(4,6-diphenyl-1,3,5-triazin-2-yl)-1,4-phenylene)bis(9H-carbazole) (p2Cz2Trz) and 9,9’-(4,6-bis(4,6-diphenyl-1,3,5-triazin-2-yl)-1,3-phenylene)bis(9H-carbazole) (m2Cz2Trz), were synthesized using bis(diphenyltriazine) as a new strong acceptor of the TADF emitters. The m2Cz2Trz showed smaller singlet-triplet energy gap (0.09 eV) and higher photoluminescence quantum yield (0.95) than p2Cz2Trz. As a result, the TADF devices fabricated using the m2Cz2Trz emitter exhibited high external quantum efficiency of 18.5% and small efficiency roll-off, suggesting the potential of bis(diphenyltriazine) as a new acceptor.

KW - Bistriazine

KW - Charge transfer

KW - Delayed fluorescence

KW - Singlet energy

KW - Triplet energy

UR - https://www.scopus.com/pages/publications/85039780694

U2 - 10.1016/j.dyepig.2017.12.048

DO - 10.1016/j.dyepig.2017.12.048

M3 - Article

AN - SCOPUS:85039780694

SN - 0143-7208

VL - 151

SP - 75

EP - 80

JO - Dyes and Pigments

JF - Dyes and Pigments

ER -

Bis(diphenyltriazine) as a new acceptor of efficient thermally activated delayed fluorescent emitters

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Keywords

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