High-triplet-energy Bipolar Host Materials Based on Phosphine Oxide Derivatives for Efficient Sky-blue Thermally Activated Delayed Fluorescence Organic Light-emitting Diodes with Reduced Roll-off

Jong Uk Kim; Michael Y. Wong; Shiv Kumar; Oliver G. Hayes; Finlay Duncan; Chin-Yiu Chan; Ben Yiu-Wing Wong; Hao Ye; Lin-Song Cui; Hajime Nakanotani; Eli Zysman-Colman; Chihaya Adachi

doi:10.1246/cl.190412

High-triplet-energy Bipolar Host Materials Based on Phosphine Oxide Derivatives for Efficient Sky-blue Thermally Activated Delayed Fluorescence Organic Light-emitting Diodes with Reduced Roll-off

Jong Uk Kim, Michael Y. Wong, Shiv Kumar, Oliver G. Hayes, Finlay Duncan, Chin-Yiu Chan, Ben Yiu-Wing Wong, Hao Ye, Lin-Song Cui, Hajime Nakanotani, Eli Zysman-Colman^*, Chihaya Adachi^*

^*Corresponding author for this work

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

4 Citations (Scopus)

Abstract

We designed and synthesized two new ambipolar host materials, namely CzPO and Cz3PO. Combining CzPO and Cz3PO with CzTRZ2 as the emitter resulted in improved maximum external quantum efficiencies of 13.1% and 13.2%, respectively, together with small efficiency roll-offs, while the device based on bis[2-(diphenylphosphino)phenyl]ether oxide (DPEPO) as host showed a much more pronounced efficiency roll-off. © 2019 The Chemical Society of Japan

Original language	English
Pages (from-to)	1225-1228
Number of pages	4
Journal	Chemistry Letters
Volume	48
Issue number	10
Online published	21 Sept 2019
DOIs	https://doi.org/10.1246/cl.190412
Publication status	Published - 5 Oct 2019
Externally published	Yes

Funding

This work was supported by a grant fund from the Regional Innovation Eco-System Program sponsored by the Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan, JST ERATO (Grant Number JPMJER1305), the International Institute for Carbon Neutral Energy Research (WPI-I2CNER) sponsored by MEXT, and JSPS KAKENHI (Grant Numbers 00H00000). EZ-C the EPSRC (EP/R035164/1; EP/P010482/1) and the University of St.Andrews and for SK the European Commission Marie Skłodowska-Curie Individual Fellowship (MCIF; No. 748430- THF-OLED). This work was supported by a grant fund from the Regional Innovation Eco-System Program sponsored by the Ministry Figure 6. Current densityvoltage (JV ) characteristics of (a) hole-only devices (HODs) and (b) electron-only devices (EODs) based on the CzPO, Cz3PO and DPEPO hosts.

Research Keywords

Ambipolar host
Organic light-emitting diode (OLED)
Thermally activated delayed fluorescence (TADF)

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Kim, J. U., Wong, M. Y., Kumar, S., Hayes, O. G., Duncan, F., Chan, C.-Y., Wong, B. Y.-W., Ye, H., Cui, L.-S., Nakanotani, H., Zysman-Colman, E., & Adachi, C. (2019). High-triplet-energy Bipolar Host Materials Based on Phosphine Oxide Derivatives for Efficient Sky-blue Thermally Activated Delayed Fluorescence Organic Light-emitting Diodes with Reduced Roll-off. Chemistry Letters, 48(10), 1225-1228. https://doi.org/10.1246/cl.190412

@article{aad4a0470ec9499ba248619146448371,

title = "High-triplet-energy Bipolar Host Materials Based on Phosphine Oxide Derivatives for Efficient Sky-blue Thermally Activated Delayed Fluorescence Organic Light-emitting Diodes with Reduced Roll-off",

abstract = "We designed and synthesized two new ambipolar host materials, namely CzPO and Cz3PO. Combining CzPO and Cz3PO with CzTRZ2 as the emitter resulted in improved maximum external quantum efficiencies of 13.1% and 13.2%, respectively, together with small efficiency roll-offs, while the device based on bis[2-(diphenylphosphino)phenyl]ether oxide (DPEPO) as host showed a much more pronounced efficiency roll-off. {\textcopyright} 2019 The Chemical Society of Japan",

keywords = "Ambipolar host, Organic light-emitting diode (OLED), Thermally activated delayed fluorescence (TADF)",

author = "Kim, {Jong Uk} and Wong, {Michael Y.} and Shiv Kumar and Hayes, {Oliver G.} and Finlay Duncan and Chin-Yiu Chan and Wong, {Ben Yiu-Wing} and Hao Ye and Lin-Song Cui and Hajime Nakanotani and Eli Zysman-Colman and Chihaya Adachi",

year = "2019",

month = oct,

day = "5",

doi = "10.1246/cl.190412",

language = "English",

volume = "48",

pages = "1225--1228",

journal = "Chemistry Letters",

issn = "0366-7022",

publisher = "Oxford University Press",

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Kim, JU, Wong, MY, Kumar, S, Hayes, OG, Duncan, F, Chan, C-Y, Wong, BY-W, Ye, H, Cui, L-S, Nakanotani, H, Zysman-Colman, E & Adachi, C 2019, 'High-triplet-energy Bipolar Host Materials Based on Phosphine Oxide Derivatives for Efficient Sky-blue Thermally Activated Delayed Fluorescence Organic Light-emitting Diodes with Reduced Roll-off', Chemistry Letters, vol. 48, no. 10, pp. 1225-1228. https://doi.org/10.1246/cl.190412

High-triplet-energy Bipolar Host Materials Based on Phosphine Oxide Derivatives for Efficient Sky-blue Thermally Activated Delayed Fluorescence Organic Light-emitting Diodes with Reduced Roll-off. / Kim, Jong Uk; Wong, Michael Y.; Kumar, Shiv et al.
In: Chemistry Letters, Vol. 48, No. 10, 05.10.2019, p. 1225-1228.

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

TY - JOUR

T1 - High-triplet-energy Bipolar Host Materials Based on Phosphine Oxide Derivatives for Efficient Sky-blue Thermally Activated Delayed Fluorescence Organic Light-emitting Diodes with Reduced Roll-off

AU - Kim, Jong Uk

AU - Wong, Michael Y.

AU - Kumar, Shiv

AU - Hayes, Oliver G.

AU - Duncan, Finlay

AU - Chan, Chin-Yiu

AU - Wong, Ben Yiu-Wing

AU - Ye, Hao

AU - Cui, Lin-Song

AU - Nakanotani, Hajime

AU - Zysman-Colman, Eli

AU - Adachi, Chihaya

PY - 2019/10/5

Y1 - 2019/10/5

N2 - We designed and synthesized two new ambipolar host materials, namely CzPO and Cz3PO. Combining CzPO and Cz3PO with CzTRZ2 as the emitter resulted in improved maximum external quantum efficiencies of 13.1% and 13.2%, respectively, together with small efficiency roll-offs, while the device based on bis[2-(diphenylphosphino)phenyl]ether oxide (DPEPO) as host showed a much more pronounced efficiency roll-off. © 2019 The Chemical Society of Japan

AB - We designed and synthesized two new ambipolar host materials, namely CzPO and Cz3PO. Combining CzPO and Cz3PO with CzTRZ2 as the emitter resulted in improved maximum external quantum efficiencies of 13.1% and 13.2%, respectively, together with small efficiency roll-offs, while the device based on bis[2-(diphenylphosphino)phenyl]ether oxide (DPEPO) as host showed a much more pronounced efficiency roll-off. © 2019 The Chemical Society of Japan

KW - Ambipolar host

KW - Organic light-emitting diode (OLED)

KW - Thermally activated delayed fluorescence (TADF)

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U2 - 10.1246/cl.190412

DO - 10.1246/cl.190412

M3 - RGC 21 - Publication in refereed journal

AN - SCOPUS:85072545498

SN - 0366-7022

VL - 48

SP - 1225

EP - 1228

JO - Chemistry Letters

JF - Chemistry Letters

IS - 10

ER -

High-triplet-energy Bipolar Host Materials Based on Phosphine Oxide Derivatives for Efficient Sky-blue Thermally Activated Delayed Fluorescence Organic Light-emitting Diodes with Reduced Roll-off

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