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High contrast ratio organic light-emitting devices based on CuPC as electron transport material
- Source :
-
Synthetic Metals . Aug2004, Vol. 144 Issue 3, p279-283. 5p. - Publication Year :
- 2004
-
Abstract
- In this paper, a high-contrast-ratio organic light-emitting device (OLED) of high brightness is demonstrated. In this device, reflection from the cathode is reduced by inserting a copper-phthalocyanine (CuPC) layer between the emitting layer (EML) and the cathode called the Black Cathodeā¢ technique. The absorption and the destructive interference effect caused by this layer lead to the decrease of the ambient light. With the same injection current density at 6 mA/cm2, the contrast ratio of this device increases from 1.9 to 2.5 under 1000 lx illumination, when compared with a conventional device. Although the thickness of this device increases by 54.5%, its driving voltage is nearly the same as that of a conventional device. This result implies the high electron mobility in the inserted CuPC layer. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 03796779
- Volume :
- 144
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- Synthetic Metals
- Publication Type :
- Academic Journal
- Accession number :
- 13470414
- Full Text :
- https://doi.org/10.1016/j.synthmet.2004.04.007