Abstract
ITO (indium-tin-oxide) is used widely as the anode electrode in organic electroluminescence devices (OLEDs). Several studies have dealt with the effect of ITO chemical treatment but to the OLEDs performance have not been considered the effect of this treatment. We were present here results regarding these effect.We studies of the effect of surface treatments on the properties of ITO substrate. We were performed chemical treatment with RCA and Aqua regiaof the OELDs. Since we will understand the properties of OELDs, we were performed Fowler-Nordheim tunneling. The buffer layer and ITO surface treatment were performed to increase the efficiency of the OLEDs. As a result, we were obtained conform the surface properties of ITO can be significantly changed by chemical treatment. The oxygen decrease produced by chemical treatment lead to increase of oxygen vacancies. We conformed that the oxygen vacancies role on increasing carrier injection. A study on the cause of improving the performance of the device using the surface treatment and the usingthe buffer layer will be of great help in understanding the relationship between the properties of the ITO substrate and the organic electroluminescent device.
Highlights
The improvement in luminous efficiency can be due to the possibility of manufacturing an amorphous organic thin film having good characteristics and improving the injection of electrons or holes
In order to improve the efficiency of an organic electroluminescent device (OLED), 1) improvement of transporter injection, 2) a structure of a device that can efficiently recombine with a numerical balance of electrons and holes, and 3) development of materials with high luminous efficiency are required [9, 10]
Since the surface treatment of the ITO substrate is essential to improve the performance of the organic electroluminescent device, we tried to investigate the effect and cause of the surface characteristics of the ITO
Summary
The improvement in luminous efficiency can be due to the possibility of manufacturing an amorphous organic thin film having good characteristics and improving the injection of electrons or holes. As an understanding of the operatingprinciple of an organic electroluminescent device (OLED), a high-luminance light-emitting material using the same has been developed. Since the development of light-emitting materials is slow and requires a lot of initial investment, researchers first understand the driving principle of the device, and from this, focus on finding necessary elements for improving device efficiency, and these efforts are classified as follows [5,6,7,8]. In order to improve the efficiency of an OLED, 1) improvement of transporter injection, 2) a structure of a device that can efficiently recombine with a numerical balance of electrons and holes, and 3) development of materials with high luminous efficiency are required [9, 10]
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