The initial interface formation between Al and tris-(8-hydroquinoline) aluminum (Alq3) with LiF interlayer

Jung Han Lee; Dae Won Moon; Yeonjin Yi

doi:10.1016/j.orgel.2009.09.022

The initial interface formation between Al and tris-(8-hydroquinoline) aluminum (Alq₃) with LiF interlayer

Jung Han Lee, Dae Won Moon, Yeonjin Yi

Department of New Biology

Research output: Contribution to journal › Article › peer-review

8 Scopus citations

Abstract

The interface between Al and tris-(8-hydroquinoline) aluminum (Alq₃) was studied using in situ medium energy ion scattering spectroscopy. We compared two interfaces of Al/LiF/Alq₃ and Al/Alq₃ with the elemental depth profile of each interface. The thin LiF changes the interfacial structures significantly; the excess Li in the LiF layer diffuses into Alq₃ while F does not. In addition, the Al diffusion into the Alq₃ layer during the initial stages of Al deposition is reduced significantly compared to the interface without the LiF interlayer. The LiF interlayer makes a more abrupt metal-organic interface, which would contribute to the efficiency and stability of the organic light-emitting device.

Original language	English
Pages (from-to)	164-168
Number of pages	5
Journal	Organic Electronics
Volume	11
Issue number	1
DOIs	https://doi.org/10.1016/j.orgel.2009.09.022
State	Published - Jan 2010

Bibliographical note

Funding Information:
This work was supported by Korea Research Council of Fundamental Science and Technology (KRCF) through the KRISS project of “Development of Advanced Industrial Metrology” and a research project of the Korea Research Foundation (Grant No. 2009-0070876 ).

Keywords

Al
Alq
Ion scattering
LiF
MEIS
Metal diffusion
Metal-organic interface
OLED

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10.1016/j.orgel.2009.09.022

Cite this

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title = "The initial interface formation between Al and tris-(8-hydroquinoline) aluminum (Alq3) with LiF interlayer",

abstract = "The interface between Al and tris-(8-hydroquinoline) aluminum (Alq3) was studied using in situ medium energy ion scattering spectroscopy. We compared two interfaces of Al/LiF/Alq3 and Al/Alq3 with the elemental depth profile of each interface. The thin LiF changes the interfacial structures significantly; the excess Li in the LiF layer diffuses into Alq3 while F does not. In addition, the Al diffusion into the Alq3 layer during the initial stages of Al deposition is reduced significantly compared to the interface without the LiF interlayer. The LiF interlayer makes a more abrupt metal-organic interface, which would contribute to the efficiency and stability of the organic light-emitting device.",

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author = "Lee, {Jung Han} and Moon, {Dae Won} and Yeonjin Yi",

note = "Funding Information: This work was supported by Korea Research Council of Fundamental Science and Technology (KRCF) through the KRISS project of “Development of Advanced Industrial Metrology” and a research project of the Korea Research Foundation (Grant No. 2009-0070876 ).",

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AU - Moon, Dae Won

AU - Yi, Yeonjin

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AB - The interface between Al and tris-(8-hydroquinoline) aluminum (Alq3) was studied using in situ medium energy ion scattering spectroscopy. We compared two interfaces of Al/LiF/Alq3 and Al/Alq3 with the elemental depth profile of each interface. The thin LiF changes the interfacial structures significantly; the excess Li in the LiF layer diffuses into Alq3 while F does not. In addition, the Al diffusion into the Alq3 layer during the initial stages of Al deposition is reduced significantly compared to the interface without the LiF interlayer. The LiF interlayer makes a more abrupt metal-organic interface, which would contribute to the efficiency and stability of the organic light-emitting device.

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