| Organic Light-Emitting Diode(OLED)is a burgeoning electroluminescent device based on organic light-emitting material.Relying on its simple preparation,wide angle of view,short responding time,high luminous intensity,all-solidification,light weight,which can realize flexible devices,full color display and have a series of unique advantages,OLED is expected to become a new generation of the backbone of display and lighting which is highly competitive in the display device,and it is considered to be the mainstream of future flat panel display technology,more and more aroused people's concern.After decades of development,organic electroluminescent devices began to mature,but the organic electroluminescent devices in terms of stability,life is not so good.Therefore,researchers from all over the world are trying to optimize the performance of the device.This paper mainly studied how the different functional layers in organic electroluminescent devices will affect the performance of the device,including different structure of the device of the electroluminescent mechanism,preparation technology and device of the electrical characteristics,carrier mobility of calculation and analysis and comparison of the optical properties.This paper introduces the different organic electroluminescent material performance,the structure of organic electroluminescent devices and light-emitting theory model.This paper firstly has carried on the laboratory preparation of organic electroluminescent devices.Due to the function of each layer thickness of organic electroluminescent devices are in nanometer scale,the thinnest hole the thickness of the isolation layer can reach 1 nm,so in the process of preparation,less pollution,as far as possible control film-forming characteristics are becoming the key factor of the preparation of high quality components,the experiment adopts the vacuum thermal evaporation coating,the heat resistance of the organic matter deposition of inorganic metal electrodes and evaporation,complete the preparation of light-emitting devices.Using Alq3 and CBP as luminescent material in this article,from the most basic of single-layer devices(only contains anode and cathode,light-emitting layer),gradually add hole transport layer NPB(organic material),hole isolation layer(Li F)inorganic materials and hole-injection buffer layer(inorganic materials molybdenum oxide),measured each kind of relations of current,voltage,and then calculate the current density,the relationship between voltage,using the method of space charge limited current(SCLC)and construct the special function method to calculate components within the carrier mobility and compared with the size of the carrier mobility in literature,the judgment quality and measuring devices the emitting spectrum,luminous brightness-the relationship of voltage,determine the open voltage of the device,the best working voltage and breakdown voltage,etc.Especially with CBP as the blue glow of doping blue OLED device has not been widely reported in the previous experiments.Preparation of blue light device is the key of the development of OLED,whether to display or white OLED lighting development has very important significance.In this paper,the structure of the successful preparation for Glass/ITO/Mo O3/NPB/CBP/LiF/Al blue OLED before has not been thorough research,its peak at 450 nm and 450 nm,the non-doped blue OLED structure can provide reference for the future study of blue light OLED,finally,this article from the experiment data in the light rule of organic electroluminescent devices.Provide the theoretical support for researchers in the future. |
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