高等学校化学学报 ›› 2021, Vol. 42 ›› Issue (Album-4): 1-8.doi: 10.7503/cjcu20200478

• 研究论文 •    

可控液体输运制备取向聚合物薄膜:面向性能增强的发光二极管

孟利利,陈琳琳,张小亮,解令海,刘欢   

  1. 1.北京航空航天大学化学学院, 仿生智能界面科学与技术教育部重点实验室, 北京 100191
    2.南京邮电大学先进材料研究所, 南京 210023
  • 收稿日期:2020-07-21 出版日期:2020-10-20 发布日期:2020-10-20
  • 基金资助:
    国家重点研发计划项目(2018YFA0704801);国家自然科学基金(21872002)

Controllable Liquid Transfer for Preparing Oriented Polymer Thin Films: Toward the Enhanced Performance of PLED

MENG Lili1, CHEN Linlin1, ZHANG Xiaoliang2, XIE Linghai2, LIU Huan1()   

  1. 1.Key Laboratory of Bio?Inspired Smart Interfacial Science and Technology of Ministry of Education,School of Chemistry,Beihang University,Beijing 100191,China
    2.Institute of Advanced Materials(IAM),Nanjing University of Posts & Telecommunications,Nanjing 210023,China
  • Received:2020-07-21 Online:2020-10-20 Published:2020-10-20
  • Contact: LIU Huan E-mail:liuh@buaa.edu.cn

摘要:

提出了一种由锥形纤维阵列引导的定向液体输运的简单策略, 实现了对聚二芳基芴(PODPF)的有序 排列. 通过热退火处理(~240 ℃), PODPF由无定形相转变为β相态, 制备的PODPF薄膜具有一定的取向性 并且结晶尺寸更大. 在去浸润过程中, 锥形纤维阵列能够精确控制三相接触线的后退, 从而使得共轭高分子在产生的定向应力作用下定向排列. 基于此制备了聚合物发光二极管(PLEDs)器件, 与由旋涂膜制备的器件相比具有更高的电流效率(1.53 cd/A)和更稳定的电致发光. 表明利用锥形纤维阵列可以制备高性能的有机发光 二极管.

关键词: 锥形纤维, 共轭高分子, 取向性有机薄膜, 聚合物发光二极管

Abstract:

We demonstrated a facile solution process guided by the conical fibers array(CFA), based on which bulky polydiarylfluorene(PODPF) were oriented on substrate. After thermal annealing at ca. 240 ℃, PODPF changed from the amorphous-phase to compact π-π stacking β-phase, leading to a PODPF film with higher orientations and larger crystallized sizes. It is proposed that the CFA enables finely controlling the wetting and dewetting processes under directional stress, guiding the disorganized polymer transform into orientation. Using the as-prepared PODPF films as the active layer, a polymer light-emitting diodes(PLEDs) device was developed, which exhibited higher current efficiency of 1.53 cd/A(5.6 V) and more stable electroluminescence compared with that of the spin-coating one. We envision that the as-developed approach offers new inspiration for fabricating high-performance polymer films.

Key words: Conical fiber, Conjugated polymer, Oriented organic thin film, Polymer light-emitting diode

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