Thermally activated delayed-fluorescence organic light-emitting diodes based on exciplex emitter with high efficiency and low roll-off

Tong Lin; Tianyou Zhang; Qiaogang Song; Fangming Jin; Zheqin Liu; Zisheng Su; Yongshi Luo; Bei Chu; C. S. Lee; Wenlian Li

doi:10.1016/j.orgel.2016.08.001

Thermally activated delayed-fluorescence organic light-emitting diodes based on exciplex emitter with high efficiency and low roll-off

Tong Lin
, Tianyou Zhang
, Qiaogang Song
, Fangming Jin
, Zheqin Liu
, Zisheng Su^*
, Yongshi Luo
, Bei Chu
, C. S. Lee
, Wenlian Li^*

^*Corresponding author for this work

City University of Hong Kong

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

21 Citations (Scopus)

Abstract

Highly efficient thermally activated delayed fluorescence (TADF) organic light-emitting diodes (OLEDs) based on exciplex are demonstrated in a blended system with commercially available 1,1-bis((di-4-tolylamino)phenyl)cyclohexane (TAPC) and 2,4,6-tris(biphenyl-3-yl)-1,3,5-triazine (T2T). By well adjusting the ratio between these two materials, the optimized device shows a low turn-on voltage of 2.4 V and a high external quantum efficiency (EQE) of 11.6%. More importantly, the device retains an EQE of 9.4% even at a high luminescence of 1000 cd/m². The low efficiency roll-off is attributed to the small singlet-triplet splitting and the short of the delayed fluorescence lifetime. Both EQE and efficiency roll-off are ones of the best performance among the reported TADF OLEDs based on exciplex.

Original language	English
Pages (from-to)	69-73
Journal	Organic Electronics: physics, materials, applications
Volume	38
DOIs	https://doi.org/10.1016/j.orgel.2016.08.001
Publication status	Published - 1 Nov 2016

Research Keywords

Efficiency roll-off
Exciplex
OLED
TADF

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10.1016/j.orgel.2016.08.001

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@article{b565164d592d4eb79ba5634624138ac6,

title = "Thermally activated delayed-fluorescence organic light-emitting diodes based on exciplex emitter with high efficiency and low roll-off",

abstract = "Highly efficient thermally activated delayed fluorescence (TADF) organic light-emitting diodes (OLEDs) based on exciplex are demonstrated in a blended system with commercially available 1,1-bis((di-4-tolylamino)phenyl)cyclohexane (TAPC) and 2,4,6-tris(biphenyl-3-yl)-1,3,5-triazine (T2T). By well adjusting the ratio between these two materials, the optimized device shows a low turn-on voltage of 2.4 V and a high external quantum efficiency (EQE) of 11.6\%. More importantly, the device retains an EQE of 9.4\% even at a high luminescence of 1000 cd/m2. The low efficiency roll-off is attributed to the small singlet-triplet splitting and the short of the delayed fluorescence lifetime. Both EQE and efficiency roll-off are ones of the best performance among the reported TADF OLEDs based on exciplex.",

keywords = "Efficiency roll-off, Exciplex, OLED, TADF",

author = "Tong Lin and Tianyou Zhang and Qiaogang Song and Fangming Jin and Zheqin Liu and Zisheng Su and Yongshi Luo and Bei Chu and Lee, \{C. S.\} and Wenlian Li",

year = "2016",

month = nov,

day = "1",

doi = "10.1016/j.orgel.2016.08.001",

language = "English",

volume = "38",

pages = "69--73",

journal = "Organic Electronics: physics, materials, applications",

issn = "1566-1199",

publisher = "Elsevier B.V.",

}

Thermally activated delayed-fluorescence organic light-emitting diodes based on exciplex emitter with high efficiency and low roll-off. / Lin, Tong; Zhang, Tianyou; Song, Qiaogang et al.
In: Organic Electronics: physics, materials, applications, Vol. 38, 01.11.2016, p. 69-73.

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

TY - JOUR

T1 - Thermally activated delayed-fluorescence organic light-emitting diodes based on exciplex emitter with high efficiency and low roll-off

AU - Lin, Tong

AU - Zhang, Tianyou

AU - Song, Qiaogang

AU - Jin, Fangming

AU - Liu, Zheqin

AU - Su, Zisheng

AU - Luo, Yongshi

AU - Chu, Bei

AU - Lee, C. S.

AU - Li, Wenlian

PY - 2016/11/1

Y1 - 2016/11/1

N2 - Highly efficient thermally activated delayed fluorescence (TADF) organic light-emitting diodes (OLEDs) based on exciplex are demonstrated in a blended system with commercially available 1,1-bis((di-4-tolylamino)phenyl)cyclohexane (TAPC) and 2,4,6-tris(biphenyl-3-yl)-1,3,5-triazine (T2T). By well adjusting the ratio between these two materials, the optimized device shows a low turn-on voltage of 2.4 V and a high external quantum efficiency (EQE) of 11.6%. More importantly, the device retains an EQE of 9.4% even at a high luminescence of 1000 cd/m2. The low efficiency roll-off is attributed to the small singlet-triplet splitting and the short of the delayed fluorescence lifetime. Both EQE and efficiency roll-off are ones of the best performance among the reported TADF OLEDs based on exciplex.

AB - Highly efficient thermally activated delayed fluorescence (TADF) organic light-emitting diodes (OLEDs) based on exciplex are demonstrated in a blended system with commercially available 1,1-bis((di-4-tolylamino)phenyl)cyclohexane (TAPC) and 2,4,6-tris(biphenyl-3-yl)-1,3,5-triazine (T2T). By well adjusting the ratio between these two materials, the optimized device shows a low turn-on voltage of 2.4 V and a high external quantum efficiency (EQE) of 11.6%. More importantly, the device retains an EQE of 9.4% even at a high luminescence of 1000 cd/m2. The low efficiency roll-off is attributed to the small singlet-triplet splitting and the short of the delayed fluorescence lifetime. Both EQE and efficiency roll-off are ones of the best performance among the reported TADF OLEDs based on exciplex.

KW - Efficiency roll-off

KW - Exciplex

KW - OLED

KW - TADF

UR - https://www.scopus.com/pages/publications/84982855452

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-84982855452&origin=recordpage

U2 - 10.1016/j.orgel.2016.08.001

DO - 10.1016/j.orgel.2016.08.001

M3 - RGC 21 - Publication in refereed journal

SN - 1566-1199

VL - 38

SP - 69

EP - 73

JO - Organic Electronics: physics, materials, applications

JF - Organic Electronics: physics, materials, applications

ER -

Thermally activated delayed-fluorescence organic light-emitting diodes based on exciplex emitter with high efficiency and low roll-off

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