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http://dx.doi.org/10.5370/KIEE.2013.62.11.1566

Electrical Properties of Organic light-emitting Diode with Oxygen Plasma Treatment  

Kim, Seung-Tae (Dept. of Electrical and Electronic Engineering, Kwangwoon University)
Hong, Jin-Woong (Dept. of Electrical and Electronic Engineering, Kwangwoon University)
Publication Information
The Transactions of The Korean Institute of Electrical Engineers / v.62, no.11, 2013 , pp. 1566-1570 More about this Journal
Abstract
In this paper, we analyzed the electric characteristics of the OLEDs device of which anode ITO has been treated with the oxygen plasma. We fabricated the basic three-layer structure (ITO / AF / $Alq_3$ / $Cs_2CO_3$ / Al) device, analyzed how the oxygen plasma treatments of the ITO surface affects to the electrical characteristics of OLEDs. We also produced a four-layer structure device (ITO / AF / TPD / $Alq_3$ / $Cs_2CO_3$ / Al) with the oxygen plasma treatment. From the comparative analysis to the devices, we confirmed following results. The three-layer structure OLEDs device with oxygen plasma treatment has better characteristics than the device without the treatments; maximum luminance, luminous efficiency, and external quantum efficiency are improved approximately 151 [%], 126 [%], and 175[%], respectively. Also, the electric characteristics of the four-layer structure device with oxygen plasma treatment are improved comparing to the characteristics of the three-layer structure device with oxygen plasma treatment; maximum luminance, luminous efficiency, and external quantum efficiency are improved approximately 144 [%], 115 [%], and 124[%], respectively.
Keywords
Oxygen plasma treatment; Organic light-emitting diode; Basic three layer device; $Cs_2CO_3$;
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