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首页> 外文会议>2017 15th International Conference on Quality in Research : International Symposium on Electrical and Computer Engineering >Effect of anode and cathode workfunction on the operating voltage and luminance of a single emissive layer organic light emitting diode
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Effect of anode and cathode workfunction on the operating voltage and luminance of a single emissive layer organic light emitting diode

机译：阳极和阴极功函数对单个发光层有机发光二极管的工作电压和亮度的影响

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Organic light emitting diodes (OLED) are considered to be a promising candidate for light sources as well as for flat panel display because of their numerous advantageous. Two important parameters of an OLED among many other parameters to measure OLED performance are operating voltage and luminance. Those two parameters are believed to be strongly influenced by an anode and cathode workfunction of materials used as electrodes. In this paper, we study the effect of anode and cathode workfunction on the operating voltage and luminance of a single emissive layer organic light emitting diode. Devices with five different cathodes: Aluminum (Al), Calcium (Ca), Magnesium (Mg), Argentum (Ar), and Cuprum (Cu) and three different anodes: Indium Thin Oxide (ITO), Poly-(3,4-Ethylenedioxidythiophene)-Poly (Styrene Sulfonate) (PEDOT:PSS), Zinc Oxide (ZnO) are compared and analyzed. A 2 nm thick of Polyfluorene (PFO) is used as an emissive layer. SimOLED is used to simulate and analyze both electrical and optical characteristics. Current voltage luminance (IVL) characteristics are simulated under forward biased from 0 to 10 V. We found that the use of anode with higher workfunction can reduce operating voltage as well as increases device luminance. On the other hand, the use of lower workfunction of cathode can reduce operating voltage however it is not always increasing device luminance. The decrease of the operating voltage by increasing anode workfunction and decreasing cathode workfunction are ascribed to the barrier lowering of the holes and the electrons respectively.
机译：有机发光二极管（OLED）由于其众多的优势而被认为是光源以及平板显示器的有前途的候选者。 OLED的两个重要参数（用于测量OLED性能的许多其他参数）是工作电压和亮度。相信这两个参数受用作电极的材料的阳极和阴极功函数的强烈影响。在本文中，我们研究了阳极和阴极功函数对单个发光层有机发光二极管的工作电压和亮度的影响。具有五个不同阴极的设备：铝（Al），钙（Ca），镁（Mg），Argentum（Ar）和铜（Cu）以及三个不同阳极：稀氧化铟（ITO），聚-（3,4-比较并分析了乙撑二氧噻吩）-聚（苯乙烯磺酸盐）（PEDOT：PSS），氧化锌（ZnO）。 2 nm厚的聚芴（PFO）用作发射层。 SimOLED用于模拟和分析电气和光学特性。在从0到10 V的正向偏置下模拟了当前的电压亮度（IVL）特性。我们发现，使用具有较高功函数的阳极可以降低工作电压并增加器件亮度。另一方面，使用较低的阴极功函数可以降低工作电压，但是并不总是增加器件的亮度。通过增加阳极功函数而降低阴极功函数而导致工作电压的降低分别归因于空穴和电子的势垒降低。

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