Organic Light-Emitting Diodes Based on a Columnar Liquid-Crystalline Perylene Emitter

被引：32

作者：

Keum, Changmin ^{[1
]}

Becker, David ^{[2
]}

Archer, Emily ^{[1
]}

Bock, Harald ^{[3
,4
]}

Kitzerow, Heinz ^{[2
]}

Gather, Malte C. ^{[1
,5
]}

Murawski, Caroline ^{[1
,6
]}

机构：

[1] Univ St Andrews, Sch Phys & Astron, SUPA, Organ Semicond Ctr, St Andrews KY16 9SS, Fife, Scotland

[2] Paderborn Univ, Dept Chem, Warburger Str 100, D-33098 Paderborn, Germany

[3] CNRS, Ctr Rech Paul Pascal, 115 Av Schweitzer, F-33600 Pessac, France

[4] Univ Bordeaux, 115 Av Schweitzer, F-33600 Pessac, France

[5] Univ Cologne, Dept Chem, Ctr Nanobiophoton, Greinstr 4-6, D-50939 Cologne, Germany

[6] Kurt Schwabe Inst Mess & Sensortech Meinsberg eV, Kurt Schwabe Str 4, D-04736 Waldheim, Germany

来源：

ADVANCED OPTICAL MATERIALS | 2020年 / 8卷 / 17期

基金：

英国工程与自然科学研究理事会;

关键词：

discotic liquid crystals; high brightness; organic light-emitting diodes; perylene; transition dipole moment orientation; MOLECULAR-ORIENTATION; ELECTROLUMINESCENT; TRANSPORT; LUMINESCENCE; DEVICES; OLEDS; EXCIPLEX; ESTERS; FILMS;

D O I：

10.1002/adom.202000414

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Liquid crystalline materials possess great potential as emitters in organic light-emitting diodes (OLEDs) due to their self-assembling property, which may lead to anisotropic films and improved charge transport. Here, the key photophysical properties of the columnar liquid crystalline emitter perylene-3,4,9,10-tetracarboxylic tetraethyl ester (PTCTE) are investigated and the material is implemented into OLEDs. It is found that vacuum-deposited PTCTE films exhibit preferential horizontal orientation of the transition dipole moment. Embedding the emitter into different host materials leads to increased photoluminescence quantum yield but reduces molecular orientation compared to the neat film. OLEDs containing PTCTE doped into an exciplex-forming co-host achieve very high luminance exceeding 10 000 cd m(-2)at 5.7 V, which is among the best performances of OLEDs based on columnar liquid crystalline emitters reported so far.

引用

页数：7

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