Effects of ITO surface modification using self-assembly molecules on the characteristics of OLEDs

Kim, Dong Hwi; Chung, Chan Moon; Park, Jong Wook; Oh, Se Young

doi:10.1016/j.ultramic.2008.04.026

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Effects of ITO surface modification using self-assembly molecules on the characteristics of OLEDs

Kim, Dong Hwi;
Chung, Chan Moon;
Park, Jong Wook;
Oh, Se Young

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18

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19

초록

Indium tin oxide (ITO) has been commonly used as an anode of organic light emitting diode (OLED), because of relatively high work function, high transmittance, and low resistance. However, interface property between ITO and adjacent organic layer limits hole injection from the anode electrode. We have synthesized 4'-nitrobiplienyl-4-carboxylic acid (NBCA) and fabricated the hole-only device consisting of ITO/NBCA self-assembled monolayer (SAM)/TPD (1500 angstrom)/Al (500 A) and the organic light emitting diode (OLED) consisting of ITO/NBCA SAM/TPD (600 angstrom)/Alq(3) (600 angstrom)/Al (600 angstrom). The prepared hole-only device with NBCA exhibited lower driving voltage than the device using 4-nitrobenzoic acid (NBA). OLED using NBCA also showed high external quantum efficiency. (C) 2008 Elsevier B.V. All rights reserved.

키워드

4 '-nitrobiphenyl-4-carboxylic acid (NBCA); self-assembled monolayer; OLED; driving voltage; LIGHT-EMITTING DEVICES; DIPOLE MOLECULES; ELECTRODES; IMPROVE; RELIABILITY; MONOLAYERS; INJECTION; POLYMERS; DIODES; OXIDE

제목: Effects of ITO surface modification using self-assembly molecules on the characteristics of OLEDs

저자: Kim, Dong Hwi; Chung, Chan Moon; Park, Jong Wook; Oh, Se Young

DOI: 10.1016/j.ultramic.2008.04.026

발행일: 2008-09

유형: Article; Proceedings Paper

저널명: Ultramicroscopy

권: 108

호: 10

페이지: 1233 ~ 1236