Electrical properties of SAM-modified ITO surface using aromatic small molecules with double bond carboxylic acid groups for OLED applications

被引：28

作者：

Can, Mustafa ^{[1
]}

Havare, Ali Kemal ^{[2
]}

Aydin, Hasan ^{[3
]}

Yagmurcukardes, Nesli ^{[3
]}

Demic, Serafettin ^{[4
]}

Icli, Siddik ^{[5
]}

Okur, Salih ^{[4
]}

机构：

[1] Izmir Katip Celebi Univ, Fac Engn, Dept Engn Sci, Izmir, Turkey

[2] Toros Univ, Fac Engn, Elect & Elect Dept, Mersin, Turkey

[3] Izmir Inst Technol, Izmir, Turkey

[4] Izmir Katip Celebi Univ, Fac Engn, Dept Mat Sci & Engn, Izmir, Turkey

[5] Ege Univ, Solar Energy Inst, Izmir, Turkey

来源：

APPLIED SURFACE SCIENCE | 2014年 / 314卷

关键词：

SAM; Carboxylic acid; SCLC; OLED; DIODES;

D O I：

10.1016/j.apsusc.2014.05.181

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

5-[(3-Methylphenyl)(phenyl)amino]isophthalic acid (5-MePIFA) and 5-(diphenyl)amino]Isophthalic acid (5-DPIFA) organic molecules were synthesized to form self-assembled monolayer on indium tin oxide (ITO) anode to enhance hole transport from ITO to organic hole transport layers such as TPD. The modified surface was characterized by scanning tunneling microscopy (STM). The change in the surface potential was measured by Kelvin probe force microscopy (KPFM). Our Kelvin probe force microscopy (KPFM) measurements showed that the surface potentials increased more than 100 mV with reference to bare indium tin-oxide. The results show that the threshold voltage on OLEDs with modified ITO is lowered significantly compared to OLEDs with unmodified ITO. The hole mobility of TPD has been estimated using space-charge-limited current measurements (SCLC). (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：1082 / 1086

页数：5

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