表面等離子體有機紅光發(fā)光器件
發(fā)布時間：2018-08-12 10:01
【摘要】：有機電致發(fā)光器件(OLED)因具有亮度高、響應快、高效節(jié)能、柔性、成本低等優(yōu)點,在平板顯示和固態(tài)照明等領域具有潛在而廣泛的應用前景。為了推進OLED產(chǎn)業(yè)化,其效率和壽命有待進一步提升。近幾年,因表面等離子體(SP)可以提高OLED發(fā)光性能,故而在OLED的研究中備受人們關注。基于金屬納米粒子產(chǎn)生的局部表面等離子體(LSP)因制備工藝簡單、易操控、成本低,因而被廣泛研究。在局部表面等離子體OLED中,金屬納米粒子可位于發(fā)光層(EML)之前的空穴傳輸層(HTL)或是EML之后的電子傳輸層(ETL)。也有部分研究工作直接將其沉積在金屬反射電極之下。根據(jù)前人報道,金屬納米粒子位于HTL中有可能提升OLED性能,也有可能降低OLED性能。針對上述爭議,本文中使用溶液方法合成的納米粒子開展了相關的研究工作。本論文將合成的Au納米棒旋涂于空穴注入層(HIL)與HTL之間,通過(1)改變HTL厚度以調整Au納米棒和EML間的距離、(2)變磷光材料為熒光材料以改變發(fā)光客體的壽命、(3)換Au納米棒為Au納米立方體以獲得與客體發(fā)光光譜交疊更好的共振光譜等手段,深入研究了Au納米粒子對OLED電學性能與發(fā)光性能的影響,探索了表面等離子體的主要工作機理。研究結果表明,(1)Au納米棒與紅色磷光體Ir(MDQ)2(acac)間未發(fā)生耦合,Au納米棒、納米立方體與紅色熒光體DCJTB激子發(fā)生了耦合作用;(2)雖然表面等離子體可以與紅色熒光體DCJTB激子發(fā)生耦合,提高DCJTB的輻射復合速率,但是Au納米棒或Au納米立方體的引入都無法提升OLED性能。我們的研究結果暗示著表面等離子體對于OLED性能提升的因素很多,不僅限于文獻中報道的輻射復合速率增加這一點,進一步的研究工作仍在進行中。
[Abstract]:Organic electroluminescent devices (OLED) have potential and wide application prospects in flat panel display and solid state lighting due to their advantages of high brightness, fast response, high efficiency and energy saving, flexibility and low cost. In order to promote the industrialization of OLED, its efficiency and service life need to be further improved. In recent years, surface plasma (SP) has attracted much attention in the research of OLED because it can improve the luminescence performance of OLED. Local surface plasma (LSP) based on metal nanoparticles has been widely studied because of its simple preparation process, easy manipulation and low cost. In local surface plasma OLED, metal nanoparticles can be located in the hole transport layer (HTL) in front of the luminescent layer (EML) or in the electron transport layer (ETL).) after EML. Part of the work directly deposited it under the metal reflecting electrode. According to previous reports, metal nanoparticles located in HTL may improve the performance of OLED and decrease the performance of OLED. In this paper, the nanoparticles synthesized by solution method have been studied. In this thesis, au nanorods were spin-coated between (HIL) and HTL. By changing the thickness of HTL to adjust the distance between au nanorods and EML, (2) changing phosphorescent materials into fluorescent materials to change the lifetime of luminescent objects, (3) replacing au nanorods as au nanometers to obtain better overlaps with guest luminescent spectra. Resonance spectroscopy, etc. The effects of au nanoparticles on the electrical and luminescent properties of OLED were investigated, and the main working mechanism of surface plasmas was explored. The results show that (1) there is no coupling between au nanorods and red phosphorescent Ir (MDQ) _ 2 (acac), while the nanocrystalline nanorods are coupled with red fluorescent DCJTB excitons. (2) although the surface plasma can be coupled with the red fluorescent DCJTB excitons, there is no coupling between the au nanorods and the red phosphorescent Ir (MDQ) _ 2 nanorods. The radiation recombination rate of DCJTB is increased, but neither au nanorods nor au nanometers can improve the OLED performance. Our results suggest that there are many factors contributing to the enhancement of OLED performance by surface plasmas, not only the increase in the radiation recombination rate reported in the literature, but also that further studies are still under way.
【學位授予單位】：南京郵電大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TN214
[Abstract]:Organic electroluminescent devices (OLED) have potential and wide application prospects in flat panel display and solid state lighting due to their advantages of high brightness, fast response, high efficiency and energy saving, flexibility and low cost. In order to promote the industrialization of OLED, its efficiency and service life need to be further improved. In recent years, surface plasma (SP) has attracted much attention in the research of OLED because it can improve the luminescence performance of OLED. Local surface plasma (LSP) based on metal nanoparticles has been widely studied because of its simple preparation process, easy manipulation and low cost. In local surface plasma OLED, metal nanoparticles can be located in the hole transport layer (HTL) in front of the luminescent layer (EML) or in the electron transport layer (ETL).) after EML. Part of the work directly deposited it under the metal reflecting electrode. According to previous reports, metal nanoparticles located in HTL may improve the performance of OLED and decrease the performance of OLED. In this paper, the nanoparticles synthesized by solution method have been studied. In this thesis, au nanorods were spin-coated between (HIL) and HTL. By changing the thickness of HTL to adjust the distance between au nanorods and EML, (2) changing phosphorescent materials into fluorescent materials to change the lifetime of luminescent objects, (3) replacing au nanorods as au nanometers to obtain better overlaps with guest luminescent spectra. Resonance spectroscopy, etc. The effects of au nanoparticles on the electrical and luminescent properties of OLED were investigated, and the main working mechanism of surface plasmas was explored. The results show that (1) there is no coupling between au nanorods and red phosphorescent Ir (MDQ) _ 2 (acac), while the nanocrystalline nanorods are coupled with red fluorescent DCJTB excitons. (2) although the surface plasma can be coupled with the red fluorescent DCJTB excitons, there is no coupling between the au nanorods and the red phosphorescent Ir (MDQ) _ 2 nanorods. The radiation recombination rate of DCJTB is increased, but neither au nanorods nor au nanometers can improve the OLED performance. Our results suggest that there are many factors contributing to the enhancement of OLED performance by surface plasmas, not only the increase in the radiation recombination rate reported in the literature, but also that further studies are still under way.
【學位授予單位】：南京郵電大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TN214
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