Low-Refractive Index Layers in Organic Light-Emitting Diodes via Electrospray Deposition for Enhanced Outcoupling Efficiencies

被引：10

作者：

Umbach, Thorsten Erich ^{[1
]}

Roellgen, Stefan ^{[1
]}

Schneider, Stefan ^{[1
]}

Klesper, Heike ^{[1
]}

Umbach, Anne Manuela ^{[2
]}

Meerholz, Klaus ^{[1
]}

机构：

[1] Univ Cologne, Inst Phys Chem, Dept Chem, Luxemburger Str 116, D-50939 Cologne, Germany

[2] Ctr Organ Elect Cologne ZOEK gGmbH, COPT Ctr, Luxemburger Str 90, D-50939 Cologne, Germany

来源：

ADVANCED ENGINEERING MATERIALS | 2020年 / 22卷 / 05期

关键词：

electrospray deposition; light outcoupling; light-emitting diodes; organic electronics; EXTRACTION; OLEDS; SCATTERING; COHERENT; CHARGE; MODES; COLOR;

D O I：

10.1002/adem.201900897

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Organic light-emitting diodes (OLEDs) still suffer from limited outcoupling efficiencies. Herein, a novel technology for the enhancement of the outcoupling efficiency of OLED devices is presented. By means of electrospray deposition (ESD), the active hole-transport layer (HTL) is modified to have a reduced effective refractive index due to its porosity. A green-emitting stack is tailored to demonstrate this effect, whereas additional haze effects are to be prevented. The introduction of a low-index HTL results in a more efficient light extraction by a factor of 1.05 showing excellent agreement between experiment and simulation.

引用

页数：9

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