基于TBPe材料的有机电致发光器件的研究

发布时间：2018-03-09 22:29

本文选题：TBPe　切入点：MEH-PPV　出处：《北京交通大学》2015年硕士论文　论文类型：学位论文

【摘要】：蓝色发光材料TBPe是一种高效的荧光小分子掺杂染料,发现其与MEH-PPV共掺杂可以提高器件的发光性能,制作出多层结构器件,能有效减小电极猝灭,并且能提高电致发光器件的性能。TBPe同其他红光、绿光材料合理搭配,设计实验,制备结构简单化的白色有机电致发光器件。本文采用掺入不同比例TBPe(2,5,8,11-tetratertbutylperylene)的MEH-PPV(po ly [2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene])作为发光层,制备ITO/PE DOT:PSS/MEH-PPV/TBPe/Al有机电致发光器件,发现TBPe的最优蒸镀厚度为0.5nm,相对于未蒸镀的标准器件发光强度提高了325%；制备ITO/PEDOT:PSS/MEH-PPV:TBPe/TBPe/Liq/Al有机电致发光器件,研究不同掺杂比例对器件性能的影响,发现最优掺杂比例为30%,相比未掺杂比例TBPe的器件,发光亮度提高44%,发光光谱波峰均位于580nm处。此外,采用Alq3提高电子注入,制作Liq和LiF修饰的ITO/PEDOT:PSS/MEH-PPV:TBPe/TBPe/Alq3/Liq/Al, ITO/PEDOT:PSS/MEH-P PViTBPe/TBPe/Alqs/LiF/Al多层器件,发光亮度达到4162.2cd/m2和4701cd/m2。本工作还制作了两种不同结构的器件,实现了OLED器件发白光。第一种方法采用TBPe与Rubrene共混蒸镀制作白光OLED器件,实现了OLED器件发白光的目的,根据能级理论,设计实验器件结构如下所示：ITO/NPB(50nm)/TBPe:Rubrene (40nm, Rwt=1%)/Alq3(40nm)/LiF(0.5nm)/Al(100nm)。器件在4V启亮,在9V时发光亮度达到最大值2234cd/m2,色坐标位于(0.3317,0.3401)处,发光光谱为三波段,色坐标在白色区域中心。第二种方法采用TBPe旋涂法制作白光OLED器件,也实现了白光OLED器件,器件结构如下所示：ITO/PVK:TBPe (wt%=95:5,10mg/ml)/Alq3:Rubrene (40nm, Rwt%=1%)/LiF(0.5nm)/Al(100nm)。此方法制作的器件,在4V启亮,在12.2V时发光亮度达到最大值5185cd/m2,色坐标位于(0.3411,0.3874),发光光谱为双波段,随着电压升高,亮度增强,发光在白色中心偏上的区域,器件发光发的是白光。
[Abstract]:Blue luminescent material (TBPe) is a kind of highly efficient fluorescent small molecule doped dye. It is found that co-doping with MEH-PPV can improve the luminescence performance of the device and fabricate the multilayer structure device, which can effectively reduce the quenching of the electrode. It can improve the performance of electroluminescent devices. TBPe can be reasonably matched with other red and green materials, and the white organic electroluminescent devices with simple structure can be fabricated by designing experiments. In this paper, ITO/PE DOT:PSS/MEH-PPV/TBPe/Al organic electroluminescent devices were fabricated by using MEH-PPV(po ly [2-methoxy-5-ethylhexyloxyne-1-ethylhexyloxyne-1-phenylenevinylene] doped with different ratios of TBPe-2Pe ~ (2 +) (11-tetratertbutylperyleneene) as a luminescent layer. It was found that the optimal thickness of TBPe was 0.5 nm, which increased the luminescence intensity of ITO/PEDOT:PSS/MEH-PPV:TBPe/TBPe/Liq/Al organic electroluminescent device by 325 nm compared with the standard device without evaporation plating, and the effect of doping ratio on the performance of the device was studied. It was found that the optimum doping ratio was 30, and the luminescence brightness of the device with no doping ratio TBPe was increased by 44%, and the peak of luminescence spectrum was at 580 nm. In addition, Alq3 was used to increase electron injection, and the Liq / LiF modified ITO / PEDOT: PSS / PPV / Alq3 / TBP / TB / TB / TB / Al / LiqP / Al, ITO/PEDOT:PSS/MEH-P PViTBPe/TBPe/Alqs/LiF/Al multilayer device was fabricated. Luminous brightness is 4162.2 cm / m ~ 2 and 4701 CD / m ~ 2. In this work, two kinds of devices with different structures have been fabricated, and the white light of OLED device has been realized. In the first method, the white light of OLED device has been realized by using TBPe and Rubrene mixed evaporation plating, and according to the energy level theory, the white light of OLED device has been realized. The structure of the experimental device is as follows: 1 ITO / NPB / 50 nm-1 / TBP: Rubrene 40nm, RW 1 / Alq340nmN / LiF0.5nmmnm1.The device is bright at 4V, with a maximum luminance of 2234cdpm2at 9V, the chromatic coordinate is 0.3317cdr 0.3401), and the luminescence spectrum is three bands. The device is light up at 4V, and its luminance reaches a maximum of 2234cdpm2at 9V, and the chromatic coordinate is at 0.3317NM 0.3401), and the luminescence spectrum is three bands. The color coordinates are in the center of the white area. The second method is to fabricate the white light OLED device by TBPe spin coating method, and also to realize the white light OLED device. The structure of the device is as follows: ITO / PVK: TBPe: TBPe. At 12.2V, the luminance reaches the maximum value of 5185cd / m2, and the color coordinate is located at 0.3411U 0.3874. The luminescence spectrum is two-band. With the increase of voltage, the luminance increases, and the luminescence is in the region above the white center, and the white light is emitted by the device.
【学位授予单位】：北京交通大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN383.1

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