Li Wei, Wu Xiaoyan, Liu Guodong, Li Yanglong, Wu Lingyuan, Fu Bo, Wang Weiping, Zhang Dayong, Zhao Jianheng
Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang, 621900, China.
Key Laboratory of Science and Technology on High Energy Laser, China Academy of Engineering Physics, Mianyang, 621900, China.
Nanoscale Res Lett. 2019 Jul 30;14(1):261. doi: 10.1186/s11671-019-3090-z.
In order to achieve a wider organic light-emitting diode (OLED) commercial popularity, solution processing inverted polymer light-emitting diode (iPLED) is a trend for further development, but there is still a gap for solution processing devices to achieve commercialization. The improvement of the performance iPLEDs is a research topic of intense current interest. The modification of the cathode interface layer of poly[(9,9-bis(3'-(N,N-dimethylamino)propyl)-2,7-fluorene)-alt-2,7-(9,9-dioctylfluorene)] (PF-NR) can greatly improve the performance of the devices. However, the electron transportation of the cathode interface layer of PF-NR films is currently poor, and there is substantial interest in improving its electron transportation to further enhance the performance of organic optoelectronic devices. In this paper, gold nanoparticles (Au NPs) with a particle size of 20 nm were prepared and doped into the interface layer PF-NR at a specified ratio. The electron transportation of the interface layer of PF-NR was greatly improved, as judged by conductive atomic force microscopy measurements, which is due to the excellent conductivity of Au NPs. Herein, we demonstrate improved electron transportation of the interface layer by doping Au NPs in PF-NR film, which provides important and practical theoretical guidance and technical support for the preparation of high performance organic optoelectronic devices.
为了实现更广泛的有机发光二极管（OLED）商业普及，溶液处理倒置聚合物发光二极管（iPLED）是进一步发展的趋势，但溶液处理器件实现商业化仍存在差距。提高iPLED的性能是当前备受关注的研究课题。聚[（9,9-双（3'-（N，N-二甲基氨基）丙基）-2,7-芴）-alt-2,7-（9,9-二辛基芴）]（PF-NR）阴极界面层的改性可大大提高器件性能。然而，目前PF-NR薄膜阴极界面层的电子传输较差，人们对改善其电子传输以进一步提高有机光电器件的性能有着浓厚兴趣。本文制备了粒径为20nm的金纳米颗粒（Au NPs），并以特定比例掺杂到界面层PF-NR中。通过导电原子力显微镜测量判断，PF-NR界面层的电子传输得到了极大改善，这是由于Au NPs具有优异的导电性。在此，我们证明了通过在PF-NR薄膜中掺杂Au NPs来改善界面层的电子传输，这为制备高性能有机光电器件提供了重要且实用的理论指导和技术支持。
