Nearly 100% internal quantum efficiency in undoped electroluminescent devices employing pure organic emitters

Qisheng Zhang; Daniel Tsang; Hirokazu Kuwabara; Yasuhiro Hatae; Bo Li; Takehiro Takahashi; Sae Youn Lee; Takuma Yasuda; Chihaya Adachi

doi:10.1002/adma.201405474

Nearly 100% internal quantum efficiency in undoped electroluminescent devices employing pure organic emitters

Qisheng Zhang
, Daniel Tsang
, Hirokazu Kuwabara
, Yasuhiro Hatae
, Bo Li
, Takehiro Takahashi
, Sae Youn Lee
, Takuma Yasuda
, Chihaya Adachi

Department of Energy and Materials Engineering

Kyushu University
Fukuoka i 3 Center for Organic Photonics and Electronics Research (i 3-OPERA)

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

552 Scopus citations

Abstract

The design of efficient and concentration-insensitive metal-free thermally activateddelayed fluorescence (TADF) materials is reported. Blue and green organic light-emitting diodes (OLEDs) containing a hole-transport layer, an undoped TADF emissive layer, and an electron-transport layer achieve maximum external quantum efficiencies of 19%, which is comparable to the best doped OLEDs.

Original language	English
Pages (from-to)	2096-2100
Number of pages	5
Journal	Advanced Materials
Volume	27
Issue number	12
DOIs	https://doi.org/10.1002/adma.201405474
State	Published - 25 Mar 2015

Keywords

electroluminescence
organic light-emitting diodes
thermally activated delayed fluorescence
undoped materials

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10.1002/adma.201405474

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@article{4816ae1e716f46aba2cd6a77a6875cdf,

title = "Nearly 100\% internal quantum efficiency in undoped electroluminescent devices employing pure organic emitters",

abstract = "The design of efficient and concentration-insensitive metal-free thermally activateddelayed fluorescence (TADF) materials is reported. Blue and green organic light-emitting diodes (OLEDs) containing a hole-transport layer, an undoped TADF emissive layer, and an electron-transport layer achieve maximum external quantum efficiencies of 19\%, which is comparable to the best doped OLEDs.",

keywords = "electroluminescence, organic light-emitting diodes, thermally activated delayed fluorescence, undoped materials",

author = "Qisheng Zhang and Daniel Tsang and Hirokazu Kuwabara and Yasuhiro Hatae and Bo Li and Takehiro Takahashi and Lee, \{Sae Youn\} and Takuma Yasuda and Chihaya Adachi",

note = "Publisher Copyright: {\textcopyright} 2015 WILEY-VCH Verlag GmbH \& Co. KGaA, Weinheim.",

year = "2015",

month = mar,

day = "25",

doi = "10.1002/adma.201405474",

language = "English",

volume = "27",

pages = "2096--2100",

journal = "Advanced Materials",

issn = "0935-9648",

publisher = "Wiley-Blackwell",

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TY - JOUR

T1 - Nearly 100% internal quantum efficiency in undoped electroluminescent devices employing pure organic emitters

AU - Zhang, Qisheng

AU - Tsang, Daniel

AU - Kuwabara, Hirokazu

AU - Hatae, Yasuhiro

AU - Li, Bo

AU - Takahashi, Takehiro

AU - Lee, Sae Youn

AU - Yasuda, Takuma

AU - Adachi, Chihaya

PY - 2015/3/25

Y1 - 2015/3/25

N2 - The design of efficient and concentration-insensitive metal-free thermally activateddelayed fluorescence (TADF) materials is reported. Blue and green organic light-emitting diodes (OLEDs) containing a hole-transport layer, an undoped TADF emissive layer, and an electron-transport layer achieve maximum external quantum efficiencies of 19%, which is comparable to the best doped OLEDs.

AB - The design of efficient and concentration-insensitive metal-free thermally activateddelayed fluorescence (TADF) materials is reported. Blue and green organic light-emitting diodes (OLEDs) containing a hole-transport layer, an undoped TADF emissive layer, and an electron-transport layer achieve maximum external quantum efficiencies of 19%, which is comparable to the best doped OLEDs.

KW - electroluminescence

KW - organic light-emitting diodes

KW - thermally activated delayed fluorescence

KW - undoped materials

UR - https://www.scopus.com/pages/publications/85027947507

U2 - 10.1002/adma.201405474

DO - 10.1002/adma.201405474

M3 - Article

AN - SCOPUS:85027947507

SN - 0935-9648

VL - 27

SP - 2096

EP - 2100

JO - Advanced Materials

JF - Advanced Materials

IS - 12

ER -

Nearly 100% internal quantum efficiency in undoped electroluminescent devices employing pure organic emitters

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Keywords

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