发光学报, 2012, 33 (1): 88, 网络出版: 2012-02-13  

水溶性酞菁化合物对有机电致发光器件亮度和效率的影响

Effect of CuTcPc Water Solution Surface Treatment on The Brightness and Current Efficiency of Organic Light Emitting Devices
孔超 1,2徐征 1,2赵谡玲 1,2张福俊 1,2闫光 1,2张天慧 1,2高利岩 1,2龚伟 1,2
作者单位
1 北京交通大学 光电子技术研究所, 北京100044
2 北京交通大学 发光与光信息技术教育部重点实验室, 北京100044
摘要
以水溶性酞菁铜(CuTcPc)为空穴注入层制备多层有机电致发光器件。ITO表面经过CuTcPc溶液修饰,能够提高空穴的注入能力,增加器件的电流密度和亮度。在有机电致发光器件中,空穴传输材料的空穴迁移率一般大于电子传输材料的电子迁移率,空穴是多数载流子;但是,CuTcPc修饰处理不仅提高了器件的电流密度和亮度,也提高了器件的电流效率。研究结果表明, CuTcPc层不仅提高了器件的空穴注入能力,也影响了电场的分布,能在一定程度上增加电子的注入。
Abstract
OLEDs with configurations of ITO/CuTcPc/NPB/Alq3∶C545T/Alq3/LiF/Al,ITO/CuTcPc/NPB/Alq3∶C545T/Alq3/Al were fabricated using CuTcPc as electron injection layer, NPB as hole transport, layer Alq3∶C545T as emission layer, and Alq3 as hole transport layer. In our experiments, the CuTcPc treated devices have greater luminances than that of the conventional devices. As holes are the majority carriers in these multilayer OLEDs, the increased hole injection should lead an imbalance of carrier and a lower efficiency. But through our experiment, it is found that both the hole injection and the electron injection are increased after CuTcPc surface treatment. CuTcPc surface treatment can not only improve the luminances and the current density, but also can improve the current efficiency of the devices comparing with the conventional devices.

孔超, 徐征, 赵谡玲, 张福俊, 闫光, 张天慧, 高利岩, 龚伟. 水溶性酞菁化合物对有机电致发光器件亮度和效率的影响[J]. 发光学报, 2012, 33(1): 88. KONG Chao, XU Zheng, ZHAO Su-ling, ZHANG Fu-jun, YAN Guang, ZHANG Tian-hui, GAO Li-yan, GONG Wei. Effect of CuTcPc Water Solution Surface Treatment on The Brightness and Current Efficiency of Organic Light Emitting Devices[J]. Chinese Journal of Luminescence, 2012, 33(1): 88.

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