有机单晶电致发光器件研究进展  

Recent developments on organic single crystal-based light-emitting devices

作　　者：朱钦程 安明慧 丁然[1,2] 冯晶 Qin-Cheng Zhu;Ming-Hui An;Ran Ding;Jing Feng(State Key Laboratory of Integrated Optoelectronics,College of Electronic Science and Engineering,Jilin University,Changchun 130012,China;Department of Applied Physics,The Hong Kong Polytechnic University,Hong Kong,China)

机构地区：[1]吉林大学电子科学与工程学院,集成光电子学国家重点实验室,长春130012 [2]香港理工大学应用物理系,中国香港

出　　处：《科学通报》2021年第22期2845-2860,共16页Chinese Science Bulletin

基　　金：国家自然科学基金(61825402)资助。

摘　　要：有机单晶半导体材料由于分子排列有序、高稳定性和高载流子迁移率等优点,成为一类具有应用潜力的光电子材料,在光电器件领域获得了广泛的应用.特别是其弥补了无定形态有机薄膜在热稳定性和载流子迁移率等方面的不足,有机单晶在有机电致发光器件(OLED)方面展现了潜在的应用前景.有机单晶OLED器件从最初的点发光到成功实现了面发光,器件性能不断提升.本文聚焦有机单晶OLED,系统总结了材料和器件制备工艺以及器件性能优化等方面的研究进展,同时讨论了有机单晶OLED性能进一步提升所面临的瓶颈难题和可行的解决方案.Organic single crystals with low impurity content and long-range periodic order usually present high carrier mobility,which have attracted increasing interest in the field of optoelectronic devices,such as organic light-emitting transistors,organic field-effect transistors(OFETS),optically pumped lasers,and organic light-emitting devices(OLEDs).They are recognized as ideal materials for OLEDs because of their better thermal stability and higher carrier mobility compared to their amorphous counterparts.This review focuses on the recent developments of organic single crystal-based OLEDs from four aspects,including a summary of widely used organic single crystals,crystal growth methods,fabrication strategies for organic single-crystal OLEDs,and structure optimizations of the devices.Before the device fabrication,it is very important to choose suitable crystal materials with prominent optoelectronic properties.The crystal materials can be classified into three different subjects according to their charge transporting properties,including P-type,N-type,and ambipolar.These crystal materials are summarized with three major properties of charge mobility,emission peak position,and energy level structure.The second is the growth methods for growing organic single crystals with low impurity and defects.Based on the traditional vapor-processing and solution-processing method,some novel crystal growth strategies have been developed for large-area organic single crystals with controllable thickness down to one molecular layer.In view of the fabrication of organic single crystal-based OLED devices,the template stripping method has been introduced to fabricate organic single crystal-based OLEDs with improved contact between metallic electrodes and crystals.Based on this method,organic single crystal-based OLEDs can be realized with bright surface emission and polarized EL behaviors.Molecular doping technique is also employed for the fabrication of crystal-based OLEDs with three primary colors.In addition,WOLEDs based on double-d

关 键 词：有机单晶半导体 光电性能 晶体生长 电致发光器件 

分 类 号：TN383.1[电子电信—物理电子学]