Studies of Alq/Mg: Ag Interface in Organic Light-Emitting Diodes by XPS Conferences

abstract

• AbstractThe organic/cathode interface plays an important role in device degradation of organic light-emitting diodes (OLEDs). The interface between 8-hydroxyquinolino aluminium (Alq) and Mg:Ag cathode in OLEDs, operated for some time, was characterized using Xray photoemission spectroscopy (XPS). An in-vacuum peel-off method was used to separate the buried interfaces. XPS results indicate that Alq molecules break down, resulting in formation of fragmented hydroxyquinolino, Mg oxides, and metallic Al at the interface. It is also found by XPS depth-profiling measurement that metallic Al diffuses into the cathode electrode, and that the fraction of oxidized Mg decreases gradually from the interface but extended very deep into the cathode.

authors

• Feng, XD
• Grozea, D
• Turak, Ayse
• Lu, ZH
• Aziz, H
• Hor, A-M

status

• published 

publication date

• 2002

published in

• Materials Research Society Symposium - Proceedings  Journal

presented at event

• Symposium on Organic and Polymeric Materials and Devices-Optical, Electrical and Optoelectronic Properties held at the 2002 MRS Spring Meeting  Conference

keywords

• ALIGNMENT
• DEVICES
• Engineering
• Engineering, Electrical & Electronic
• Materials Science
• Materials Science, Multidisciplinary
• Optics
• Physical Sciences
• Physics
• Physics, Applied
• SPOTS
• Science & Technology
• Technology

Digital Object Identifier (DOI)

• 10.1557/proc-725-p4.8

International Standard Book Number (ISBN) 10

• 1-55899-661-3

start page

• 31

end page

• 36

volume

• 725