Sequential Multiple Borylation Toward an Ultrapure Green Thermally Activated Delayed Fluorescence Material

Shigetada Uemura; Susumu Oda; Masahiro Hayakawa; Ryosuke Kawasumi; Naoya Ikeda; Yi-Ting Lee; Chin-Yiu Chan; Youichi Tsuchiya; Chihaya Adachi; Takuji Hatakeyama

doi:10.1021/jacs.2c10946

Sequential Multiple Borylation Toward an Ultrapure Green Thermally Activated Delayed Fluorescence Material

Shigetada Uemura
, Susumu Oda
, Masahiro Hayakawa
, Ryosuke Kawasumi
, Naoya Ikeda
, Yi-Ting Lee
, Chin-Yiu Chan
, Youichi Tsuchiya
, Chihaya Adachi
, Takuji Hatakeyama^*

^*Corresponding author for this work

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

147 Citations (Scopus)

Abstract

Multiple-resonance thermally activated delayed fluorescence (MR-TADF) emitters have emerged as an important component of organic light-emitting diodes (OLEDs) because of their narrowband emission and high exciton utilization efficiency. However, the chemical space of MR-TADF emitters remains mostly unexplored because of the lack of suitable synthetic protocols. Herein, we demonstrate a sequential multiple borylation reaction that provides new synthetically accessible chemical space. ω-DABNA, the proof-of-concept material, exhibited narrowband green TADF with a full width at half-maximum of 22 nm and a small singlet-triplet energy gap of 13 meV. The OLED employing it as an emitter exhibited electroluminescence at 512 nm, with Commission International de l’Éclairage coordinates of (0.13, 0.73) and a high external quantum efficiency (EQE) of 31.1%. Moreover, the device showed minimum efficiency roll-off, with an EQE of 29.4% at 1000 cd m^–2. © 2022 American Chemical Society.

Original language	English
Pages (from-to)	1505-1511
Number of pages	7
Journal	Journal of the American Chemical Society
Volume	145
Issue number	3
Online published	22 Dec 2022
DOIs	https://doi.org/10.1021/jacs.2c10946
Publication status	Published - 25 Jan 2023
Externally published	Yes

Funding

This study was supported by JST CREST (grant number JPMJCR22B3) and JSPS KAKENHI (grant numbers 20H05863, 21H02019, and 21H05408). The authors are grateful to Drs. Masakazu Kondo and Takeshi Matsushita for their experimental support and valuable input. The X-ray crystal structure analysis was performed at BL40XU at the SPring-8 facility with the approval of JASRI (2019A1142, 2019B1063, 2020A1066, 2021B1125, and 2022A1114) and the help of Dr. Nobuhiro Yasuda (JASRI).

Access Output

10.1021/jacs.2c10946

Other Access Options

Check CityUHK Library

Permanent Link

Right click to copy link

Cite this

@article{8b1eb106f9ba47098a8f099ac78a599c,

title = "Sequential Multiple Borylation Toward an Ultrapure Green Thermally Activated Delayed Fluorescence Material",

abstract = "Multiple-resonance thermally activated delayed fluorescence (MR-TADF) emitters have emerged as an important component of organic light-emitting diodes (OLEDs) because of their narrowband emission and high exciton utilization efficiency. However, the chemical space of MR-TADF emitters remains mostly unexplored because of the lack of suitable synthetic protocols. Herein, we demonstrate a sequential multiple borylation reaction that provides new synthetically accessible chemical space. ω-DABNA, the proof-of-concept material, exhibited narrowband green TADF with a full width at half-maximum of 22 nm and a small singlet-triplet energy gap of 13 meV. The OLED employing it as an emitter exhibited electroluminescence at 512 nm, with Commission International de l{\textquoteright}{\'E}clairage coordinates of (0.13, 0.73) and a high external quantum efficiency (EQE) of 31.1\%. Moreover, the device showed minimum efficiency roll-off, with an EQE of 29.4\% at 1000 cd m–2. {\textcopyright} 2022 American Chemical Society.",

author = "Shigetada Uemura and Susumu Oda and Masahiro Hayakawa and Ryosuke Kawasumi and Naoya Ikeda and Yi-Ting Lee and Chin-Yiu Chan and Youichi Tsuchiya and Chihaya Adachi and Takuji Hatakeyama",

year = "2023",

month = jan,

day = "25",

doi = "10.1021/jacs.2c10946",

language = "English",

volume = "145",

pages = "1505--1511",

journal = "Journal of the American Chemical Society",

issn = "0002-7863",

publisher = "American Chemical Society",

number = "3",

}

TY - JOUR

T1 - Sequential Multiple Borylation Toward an Ultrapure Green Thermally Activated Delayed Fluorescence Material

AU - Uemura, Shigetada

AU - Oda, Susumu

AU - Hayakawa, Masahiro

AU - Kawasumi, Ryosuke

AU - Ikeda, Naoya

AU - Lee, Yi-Ting

AU - Chan, Chin-Yiu

AU - Tsuchiya, Youichi

AU - Adachi, Chihaya

AU - Hatakeyama, Takuji

PY - 2023/1/25

Y1 - 2023/1/25

N2 - Multiple-resonance thermally activated delayed fluorescence (MR-TADF) emitters have emerged as an important component of organic light-emitting diodes (OLEDs) because of their narrowband emission and high exciton utilization efficiency. However, the chemical space of MR-TADF emitters remains mostly unexplored because of the lack of suitable synthetic protocols. Herein, we demonstrate a sequential multiple borylation reaction that provides new synthetically accessible chemical space. ω-DABNA, the proof-of-concept material, exhibited narrowband green TADF with a full width at half-maximum of 22 nm and a small singlet-triplet energy gap of 13 meV. The OLED employing it as an emitter exhibited electroluminescence at 512 nm, with Commission International de l’Éclairage coordinates of (0.13, 0.73) and a high external quantum efficiency (EQE) of 31.1%. Moreover, the device showed minimum efficiency roll-off, with an EQE of 29.4% at 1000 cd m–2. © 2022 American Chemical Society.

AB - Multiple-resonance thermally activated delayed fluorescence (MR-TADF) emitters have emerged as an important component of organic light-emitting diodes (OLEDs) because of their narrowband emission and high exciton utilization efficiency. However, the chemical space of MR-TADF emitters remains mostly unexplored because of the lack of suitable synthetic protocols. Herein, we demonstrate a sequential multiple borylation reaction that provides new synthetically accessible chemical space. ω-DABNA, the proof-of-concept material, exhibited narrowband green TADF with a full width at half-maximum of 22 nm and a small singlet-triplet energy gap of 13 meV. The OLED employing it as an emitter exhibited electroluminescence at 512 nm, with Commission International de l’Éclairage coordinates of (0.13, 0.73) and a high external quantum efficiency (EQE) of 31.1%. Moreover, the device showed minimum efficiency roll-off, with an EQE of 29.4% at 1000 cd m–2. © 2022 American Chemical Society.

UR - https://www.scopus.com/pages/publications/85144865401

UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-85144865401&origin=recordpage

U2 - 10.1021/jacs.2c10946

DO - 10.1021/jacs.2c10946

M3 - RGC 21 - Publication in refereed journal

C2 - 36547020

AN - SCOPUS:85144865401

SN - 0002-7863

VL - 145

SP - 1505

EP - 1511

JO - Journal of the American Chemical Society

JF - Journal of the American Chemical Society

IS - 3

ER -

Sequential Multiple Borylation Toward an Ultrapure Green Thermally Activated Delayed Fluorescence Material

Abstract

Funding

Access Output

Other Access Options

Permanent Link

Other Files and Links

Fingerprint

Cite this