Abstract
This study examined the interfaces of Alq3 on a thin 8-hydroxyquinolatolithium (Liq) layer deposited on aluminum using X-ray and ultraviolet photoemission spectroscopy. A thin layer of Liq reacted with the underlying aluminum surface. As a result, the molecular orbital features of Alq3 shifted to a higher binding energy and a new gap state was created. This effect is believed to lower the barrier height for electron injection. An organic light emitting device with a structure of ITO/Al/Liq/Alq3/NPB/WO3/Al was fabricated.The device performance showed characteristics that were consistent with the results of the photoemission studies. It is proposed that Al/Liq can be used as an efficient electron injection layer for inverted organic light emitting devices.
Original language | English |
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Pages (from-to) | 407-412 |
Number of pages | 6 |
Journal | Organic Electronics |
Volume | 9 |
Issue number | 3 |
DOIs | |
Publication status | Published - 2008 Jun |
All Science Journal Classification (ASJC) codes
- Electronic, Optical and Magnetic Materials
- Chemistry(all)
- Biomaterials
- Condensed Matter Physics
- Electrical and Electronic Engineering
- Materials Chemistry