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ZnPc/PbPc共混蒸镀薄膜二极管的制备与工作特性

2019-07-31赵双朱敏

哈尔滨理工大学学报 2019年3期

赵双 朱敏

摘 要:有机薄膜二极管选取酞菁锌和酞菁铅(ZnPc和PbPc)进行混合作为器件的有源层,利用多种镀膜方式,制备了结构为Cu/ ZnPc+ PbPc/ Al的器件,其中,ZnPc∶PbPc混合的质量比分别为1∶1、4∶5和5∶4,对二极管进行了输出特性测试和混合薄膜的吸收光谱测试。结果表明,3种混合方式的二极管均具有整流特性。通过实验分析可以得出:ZnPc∶PbPc的混合质量比为1∶1的器件的载流子的传输最快。实验结果表明:适当的ZnPc∶PbPc的混合质量比可以降低肖特基势垒的高度,从而使载流子的迁移率加大。由实验结果计算得出,ZnPc∶PbPc的混合质量比为1∶1的器件的势垒高度为0.355eV,影响因子n为18.21。

关键词:共混薄膜二极管;酞菁锌;酞菁铅;工作特性

DOI:10.15938/j.jhust.2019.03.022

中图分类号: TN311+.5

文献标志码: A

文章编号: 1007-2683(2019)03-0134-04

Abstract:Organic thin film diode selected zinc phthalocyanine and plumbum phthalocyanine (ZnPc and PbPc) were mixed as the active layer of the device. The hybrid thin film diodes structure of Cu/ ZnPc+ PbPc/ Al was prepared using a variety of coating methods, among them, the mass ratio of ZnPc∶PbPc was 1∶1, 4∶5 and 5∶4, respectively. The electrical tests and optical tests were carried out. The results show that three types of the hybrid thin film diodes have a rectifying characteristic. Through the experimental analysis, it can be concluded that when the mass ratio of the two materials is 1∶1, the carrier transport of the device is the fastest, and the appropriate content of PbPc can reduce the height of the Schottky barrier, thus the carrier mobility increasing. It is calculated that when the mass ratio of the two materials is 1∶1, the barrier height of the device is 0.355eV, the influence factor is 18.21.

Keywords:the hybrid thin film diodes; zinc phthalocyanine; plumbum phthalocyanine; operating characteristics

0 引 言

有機光电二极管OLED自20世纪中期被发现以来,其技术得到了不断地得以创新和改进,被认为是第三代显示技术领域的主力军[1]。OLED技术具有低功耗、主动发光、全固态、发光亮度高、色彩丰富和易于实现柔性显示等优点,使有机薄膜光电器件成为未来科技的主流和趋势[2-8]。然而,有机材料存在一定的缺点,如载流子的迁移率小于无机材料和有机材料的不稳定性,因此,我们需要进一步的研究,提高有机器件的特性和提高器件的封装技术[9-12]。为了克服有机材料的一些缺点,人们进行了垂直型有机器件的制备和研究。垂直结构的器件,导电沟道长度缩短,可以有效地降低器件的驱动电压和提高工作电流,并且在显示方面具有高地稳定性和高地发光效率,已经成功地实现了有机显示器驱动元件的应用[13-18]。……

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