Enhancement of the Luminance Efficiency due to an Embedded Self-Assembled Monolayer in Organic Light-Emitting Devices

被引：3

作者：

Kim, Ki Tae ^{[1
]}

Jeon, Young Pyo ^{[1
]}

Seo, Hanmin ^{[2
]}

Noh, Jaegeun ^{[2
]}

Kim, Tae Whan ^{[1
]}

机构：

[1] Hanyang Univ, Dept Elect & Comp Engn, Seoul 133791, South Korea

[2] Hanyang Univ, Dept Chem, Seoul 133791, South Korea

来源：

JAPANESE JOURNAL OF APPLIED PHYSICS | 2013年 / 52卷 / 11期

基金：

新加坡国家研究基金会;

关键词：

HOLE-INJECTION; EMISSION; DIODES; LAYER; ALKANETHIOL; TRANSITION; VOLTAGE; FILMS;

D O I：

10.7567/JJAP.52.11NK01

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The electrical and optical properties of organic light-emitting devices (OLEDs) with and without a self-assembled monolayer (SAM) were investigated, and the effect of an embedded SAM was clarified. The contact angles of COOH-terminated alkanethiol SAMs were smaller than those of CH3-terminated alkanethiol SAMs. The operating voltage of OLEDs with COOH-terminated alkanethiol SAMs was 4.4 V lower than that with CH3-terminated alkanethiol SAMs. The luminance of OLEDs with COOH-terminated alkanethiol SAMs was higher than that with CH3-terminated alkanethiol SAMs. The enhancement of the luminance efficiency of OLEDs with COOH-terminated alkanethiol SAMs was attributed to the increase in hole injection due to a decrease in the chain length of the COOH-terminated alkanethiols, resulting in a better balance between the numbers of holes and electrons at an emitting layer in the OLEDs. (C) 2013 The Japan Society of Applied Physics

引用

页数：4

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