Highly Luminescent Aluminum Complex with β-Diketone Ligands Exhibiting Near-Unity Photoluminescence Quantum Yield, Thermally Activated Delayed Fluorescence, and Rapid Radiative Decay Rate Properties in Solution-Processed Organic Light-Emitting Devices

被引：18

作者：

Matsuya, Misaki ^{[1
]}

Sasabe, Hisahiro ^{[1
,2
,3
]}

Sumikoshi, Shunsuke ^{[1
]}

Hoshi, Keigo ^{[1
]}

Nakao, Kohei ^{[1
]}

Kumada, Kengo ^{[1
]}

Sugiyama, Ryo ^{[1
]}

Sato, Ryoma ^{[1
]}

Kido, Junji ^{[1
,2
]}

机构：

[1] Yamagata Univ, Dept Organ Mat Sci, 4-3-16 Jonan, Yonezawa, Yamagata 9928510, Japan

[2] Yamagata Univ, Res Ctr Organ Elect ROEL, 4-3-16 Jonan, Yonezawa, Yamagata 9928510, Japan

[3] Yamagata Univ, Frontier Ctr Organ Mat FROM, 4-3-16 Jonan, Yonezawa, Yamagata 9928510, Japan

来源：

BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN | 2023年 / 96卷 / 02期

基金：

日本科学技术振兴机构; 日本学术振兴会;

关键词：

Organic light-emitting devices; Thermally activated delayed fluorescence (TADF); -diketone ligands; HIGH-EFFICIENCY; HOST MATERIALS; EMITTERS; DIODES; CONVERSION; OLEDS;

D O I：

10.1246/bcsj.20220327

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

A highly luminescent mononuclear Al complex with beta-diketone ligands exhibiting superior thermally activated de-layed fluorescence (TADF) properties was developed in this work. The complex showed yellow emission with promising photofunctions, including a near-unity photoluminescence quantum yield (PLQY), a rapid radiative decay rate, and a short delayed fluorescence lifetime in the solid state. When applied in a solution-processed organic light-emitting device, an external quantum efficiency (EQE) exceeding 18% and a low turn-on voltage of 2.9 V at 1 cd/m2 were obtained, sur-passing those of the corresponding beta-diketone ligand. Metal complexation with Al generated unique electronic structures that significantly strengthened the photofunctions of the origi-nal beta-diketone ligand in the solid state.

引用

页码：183 / 189

页数：7

共 21 条

[21] Blue-shifted emission color and high quantum efficiency in solution-processed blue thermally activated delayed fluorescence organic light-emitting diodes using an intermolecular interaction suppressing host decorated with blocking groups
Jeon, Sang Kyu
Park, Hee-Jun
Lee, Jun Yeob
JOURNAL OF MATERIALS CHEMISTRY C, 2018, 6 (25) : 6778 - 6783

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