顶发射绿光OLED器件制备及其光电性能研究  

Preparation and Performance of Top-Emitting Organic Green Light Emitting Devices

作　　者：王光华 周芳[1] 陈雪梅 高思博 张杰[1] 段瑜 段良飞 钱福丽 杨启鸣[1] 武艳鸣 赵孟玲 季华夏 WANG Guanghua;ZHOU Fang;CHEN Xuemei;GAO Sibo;ZHANG Jie;DUAN Yu;DUAN Liangfei;QIAN Fuli;YANG Qiming;WU Yanming;ZHAO Mengling;JI Huaxia(Yunnan Olightek Opto-electronic Technology Co.,Ltd.,Kunming 650223,China;Kunming Institute of Physics,Kunming 650223,China)

机构地区：[1]云南北方奥雷德光电科技股份有限公司,云南昆明650223 [2]昆明物理研究所,云南昆明650223

出　　处：《红外技术》2020年第9期817-822,共6页Infrared Technology

基　　金：云南省“新型硅基OLED微型显示技术开发”创新团队项目;云南省应用基础研究面上项目(2016FB112);国家自然科学基金(6160408641)7项目;云南省技术创新人才培养项目(2017HB111);云南省“万人计划”产业技术领军人才培养项目等资助。

摘　　要：实验制备了结构为多层阳极/EHI608/NPB/Alq3:ELL/ETL1/LiF/Mg:Ag/CPL的硅基绿光有机电致发光OLED器件,研究了不同掺杂浓度对器件驱动电压、亮度、发光效率和EL光谱影响。在此基础上,通过在阴极上制备了一定厚度的阴极耦合层CPL,并研究了阴极耦合层对OLED器件微腔效应影响。结果表明,随着发光层掺杂浓度的增大,器件驱动电压、发光亮度和效率逐渐增加,并出现EL光谱发光峰位红移。同时,随着CPL厚度增加,多层膜系ETL/EIL/Mg:Ag/CPL透过率逐渐增加,当阴极耦合层CPL厚度在30 nm时候,多层膜系结构的透过率和透过频带较高,多层膜系透过率光谱坐标接近白光(0.33,0.33)等能点。此时,顶发射绿光OLED器件在不同视角下EL光谱的蓝移现象最大限度得到了抑制,且EL光谱半峰宽明显增加。Green light devices with a top multilayer anode/EHI608/NPB/Alq3:ELL/ETL02/LiF/Mg:Ag/out-capping layer configuration were experimentally prepared on silicon substrate.The doping concentrations of emitting layer have strict effects on the driving voltages,luminances,efficiencies and electroluminescent(EL)spectra of OLED devices.Further,the microcavity characteristics of top-emitting green OLED devices were examined.Based on the transfer matrix theory and optical constants of materials,the transmission of multilayer thin films(ETL/EIL/Mg︰Ag/CPL)are numerically calculated with matlab program.The experimental results demonstrated that based on an increase in the dopant concentration of the guest materials,the electroluminescent(EL)efficiency,driving voltage and luminance of the organic light-emitting device increased.And the doped concentration of the guest is controlled at 3.5%,the efficiency of the device remained stable,the transmission of multilayer thin films(ETL/EIL/Mg︰Ag/CPL)gradually increased,according to the increase in the CPL thickness of the cathode refractive index matching layers.When the CPL thickness is controlled at approximately 30 nm,the transmission in the entire visible range is maximized,and the transmission spectrum(CIEx,CIEy)value of multilayer thin films(ETL/EIL/Mg︰Ag/CPL)are extremely near to the white equal energy(0.33,0.33).

关 键 词：有机发光二极管 转移矩阵 阴极耦合层 硅基 

分 类 号：TN383.1[电子电信—物理电子学] TN873.3