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Preparation of 8-hydroxyquinoline aluminum nanomaterials to enhance properties for green organic light-emitting diode devices
Journal of the Society for Information Display ( IF 1.7 ) Pub Date : 2021-01-20 , DOI: 10.1002/jsid.986 Liangfei Duan 1 , Huiqin Yang 2 , Guanghua Wang 3 , Yu Duan 3
Journal of the Society for Information Display ( IF 1.7 ) Pub Date : 2021-01-20 , DOI: 10.1002/jsid.986 Liangfei Duan 1 , Huiqin Yang 2 , Guanghua Wang 3 , Yu Duan 3
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Tris(8-hydroquinoline) aluminum (Alq3) plays an important role in the applications of green organic light-emitting diodes (OLEDs). In this paper, Alq3 nanofilms were prepared on glass substrates by physical vapor deposition system with different surface states. The structures and morphologies of Alq3 nanofilms were characterized by X-ray diffractometer and scanning electron microscope. Alq3 nanomaterials were used as the main luminescent material for green OLED devices. The structure of the green OLED is Mo/2-TNATA (20 nm)/NPB (10 nm)/Alq3 (25 nm):Ir(ppy)3 (5%)/Bphen (10 nm)/LiF (5 nm)/Mg:Ag (10%) (10 nm). The photoelectric properties of green OLED devices were characterized by the system of Photo Research PR655 spectrometer. The results show that the weak interactions among Alq3 molecules such as π–π bond interactions and van der Waals forces caused molecules self-assembling into nanospheres, nanospherical chains, nanowires, or nanotubes in physical vapor deposition system. Precise surface state control of Alq3 nanomaterials can be realized by controlling the deposition temperature, thus, to enhance properties for green OLED displays. It is found that among different morphologies, Alq3 nanotubes have been proved to be the best green OLED devices with the brightness of 11,490 cd/m2, CIE (3358, 0.6302) at 5 V, and the current efficiency is 20.24 cd/A.
中文翻译：
8-羟基喹啉铝纳米材料的制备提高绿色有机发光二极管器件的性能
三（8-氢喹啉）铝（Alq3）在绿色有机发光二极管（OLED）的应用中发挥着重要作用。本文采用物理气相沉积系统在玻璃基板上制备了不同表面态的Alq3纳米薄膜。通过X射线衍射仪和扫描电子显微镜对Alq3纳米薄膜的结构和形貌进行了表征。Alq3纳米材料被用作绿色OLED器件的主要发光材料。绿色OLED的结构为Mo/2-TNATA (20 nm)/NPB (10 nm)/Alq3 (25 nm):Ir(ppy) 3(5%)/Bphen (10 nm)/LiF (5 nm)/Mg:Ag (10%) (10 nm)。绿色OLED器件的光电特性通过Photo Research PR655光谱仪系统进行表征。结果表明，Alq3分子之间的π-π键相互作用和范德华力等弱相互作用导致分子在物理气相沉积系统中自组装成纳米球、纳米球链、纳米线或纳米管。通过控制沉积温度可以实现对 Alq3 纳米材料的精确表面状态控制，从而提高绿色 OLED 显示器的性能。结果发现，在不同形态中，Alq3纳米管已被证明是最好的绿色OLED器件，其亮度为11,490 cd/m 2，CIE (3358, 0.6302) at 5 V，电流效率为20.24 cd/A。
更新日期：2021-01-20
中文翻译：
8-羟基喹啉铝纳米材料的制备提高绿色有机发光二极管器件的性能
三（8-氢喹啉）铝（Alq3）在绿色有机发光二极管（OLED）的应用中发挥着重要作用。本文采用物理气相沉积系统在玻璃基板上制备了不同表面态的Alq3纳米薄膜。通过X射线衍射仪和扫描电子显微镜对Alq3纳米薄膜的结构和形貌进行了表征。Alq3纳米材料被用作绿色OLED器件的主要发光材料。绿色OLED的结构为Mo/2-TNATA (20 nm)/NPB (10 nm)/Alq3 (25 nm):Ir(ppy) 3(5%)/Bphen (10 nm)/LiF (5 nm)/Mg:Ag (10%) (10 nm)。绿色OLED器件的光电特性通过Photo Research PR655光谱仪系统进行表征。结果表明，Alq3分子之间的π-π键相互作用和范德华力等弱相互作用导致分子在物理气相沉积系统中自组装成纳米球、纳米球链、纳米线或纳米管。通过控制沉积温度可以实现对 Alq3 纳米材料的精确表面状态控制，从而提高绿色 OLED 显示器的性能。结果发现，在不同形态中，Alq3纳米管已被证明是最好的绿色OLED器件，其亮度为11,490 cd/m 2，CIE (3358, 0.6302) at 5 V，电流效率为20.24 cd/A。
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