Highly Efficient Organic Light-Emitting Diode Using A Low Refractive Index Electron Transport Layer

被引：53

作者：

Salehi, Amin ^{[1
]}

Ho, Szuheng ^{[2
]}

Chen, Ying ^{[3
]}

Peng, Cheng ^{[2
]}

Yersin, Hartmut ^{[4
]}

So, Franky ^{[3
]}

机构：

[1] North Carolina State Univ, Dept Phys, Raleigh, NC 27695 USA

[2] Univ Florida, Dept Mat Sci & Engn, Gainesville, FL 32611 USA

[3] North Carolina State Univ, Dept Mat Sci & Engn, Raleigh, NC 27695 USA

[4] Univ Regensburg, Inst Phys Chem, D-93040 Regensburg, Germany

来源：

ADVANCED OPTICAL MATERIALS | 2017年 / 5卷 / 11期

关键词：

electron transport layers; low refractive indexes; organic light emitting diodes; thermally activated delayed florescence; OPERATIONAL STABILITY; HOST MATERIALS; SKY-BLUE; DEVICES; OLEDS; GREEN; FLUORESCENCE; RED;

D O I：

10.1002/adom.201700197

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A low refractive index electron transport layer (ETL) can be very effective in enhancing the out-coupling efficiency of an organic light-emitting diode (OLED). However, most organic films show a refractive index close to 1.8. In this work, it has been discovered that tris-[3-(3-pyridyl) mesityl] borane (3TPYMB) has a low refractive index of 1.65 (at 550 nm), which is the lowest refractive index ETL among the commonly used ETLs up to date. Using 3TPYMB as an ETL, a solution processed OLED is demonstrated with nearly a 76% enhancement in external quantum efficiency (EQE). Optical simulation results of this study show that 59% of the enhancement comes from the low refractive index 3TPYMB, and the remaining 17% from the change in charge balance due to the 3TPYMB ETL in the OLED devices.

引用

页数：7

共 33 条

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