金属纳米颗粒的导入对顶发射OLED光取出影响的FDTD模拟与研究  

FDTD Simulation and Study on Effect of Metal Nanoparticle Introduction on Light Extraction of Top-Emitting OLED

作　　者：潘赛虎[1] 于航 赵云平 胡苏豪 兰伟霞 魏斌 Pan Saihu;Yu hang;Zhao Yunping;Hu Suhao;Lan Weixia;Wei Bin(School of Microelectronics and Control Engineering,Changzhou University,Changzhou 213164,Jiangsu,China;Key Laboratory of Advanced Display and System Applications Ministry of Education,School of Mechatronic Engineering and Automation,Shanghai University,Shanghai 200072,China)

机构地区：[1]常州大学微电子与控制工程学院,江苏常州213164 [2]上海大学机电工程与自动化学院新型显示技术及应用集成教育部重点实验室,上海200072

出　　处：《光学学报》2022年第9期198-204,共7页Acta Optica Sinica

基　　金：国家自然科学基金(11974236,62005152);江苏省研究生科研与实践创新计划(KYCX20_2549)。

摘　　要：由于有机发光二极管(OLED)中存在金属阴极和有机层界面,故部分光子会转化为表面等离子激元沿金属表面传播耗散掉。同时,金属阴极自身也会吸收部分光能量。这两种情况均会导致器件出光率降低。分析了在结构为Ag(100 nm)/MoO_(3)(5 nm)/NPB(35 nm)/EML(20 nm)/Alq_(3)(40 nm)/Al(20 nm)/MoO_(3)(50 nm)的器件内部引入银纳米颗粒(Ag NPs)或者金纳米颗粒(Au NPs)后器件出光效率的变化。同时,改变金属纳米颗粒的位置以观察其对出光效率的影响。利用有限差分时域法对无金属纳米颗粒的器件和金属纳米颗粒位于器件不同位置时的出光效率进行了模拟计算。结果显示,Ag NPs或者Au NPs都可以提高器件出光效率且Ag NPs优于Au NPs。在468 nm波长下,Ag NPs位于Al阴极表面、电子传输层(ETL)中间和Ag表面时器件的透光率分别是51.1%,50.5%和45.5%,而未掺杂Ag NPs的参考器件的透光率仅为43.3%。Some photons will be transformed into surface plasmon polaritons and dissipated along the metal surface due to the existence of the interface between metal cathode and organic layer in organic light-emitting diode(OLED).At the same time,the metal cathode absorbs part of the light energy.Both of these cases will result in a very low power efficiency of the device.The changes of luminous efficiency of the device with the structure of Ag(100 nm)/MoO_(3)(5 nm)/NPB(35 nm)/EML(20 nm)/Alq_(3)(40 nm)/Al(20 nm)/MoO_(3)(50 nm)are analyzed after the introduction of silver nanoparticles(Ag NPs)or gold nanoparticles(Au NPs).Furthermore,the positions of the metal nanoparticles are changed to observe the effect of different positions of the nanoparticles on the luminous efficiency of the device.The finite-difference time-domain method is used to simulate the luminous efficiencies of devices without metal nanoparticles and metal nanoparticles at different positions of the device.The results show that both Ag NPs and Au NPs can improve the luminous efficiency,and Ag NPs are better than Au NPs.At the wavelength of 468 nm,when Ag NPs are located on the surface of Al cathode,the middle of electron transport layer(ETL)and the Ag surface,the transmittance of the device is 51.1%,50.5%and 45.5%,respectively.However,the transmittance of the reference device without Ag NPs is only 43.3%.

关 键 词：材料 金属纳米颗粒 顶发射有机发光二极管 有限差分时域法 表面等离子激元 

分 类 号：O482.31[理学—固体物理]