基于模板剥离法制备有机晶体发光二极管器件及其特性  

Organic single crystal-based light-emitting devices by template stripping technique

作　　者：周威[1] 董奉喜 丁然[1,2] 冯晶[1] 

机构地区：[1]吉林大学电子科学与工程学院,集成光电子国家重点实验室,长春130012 [2]长春理工大学,国家纳米操纵与制造国际联合研究中心,长春130022

出　　处：《科学通报》2016年第10期1135-1140,共6页Chinese Science Bulletin

基　　金：国家自然科学基金(61322402,91233123,51373064,61177024);国家重点基础研究发展计划(2013CBA01700)资助

摘　　要：有机晶体材料由于具有低的杂质含量、高的载流子迁移率、以及高的荧光量子效率在光电器件领域受到人们广泛的关注.但是,由于有机晶体材料具有易碎、致柔且对有机溶剂敏感等特性,导致其难于制备发光二极管器件.本文设计了一种简单且无破坏性的工艺方法,即模板剥离法,制备有机晶体发光二极管器件.基于此方法通过改善晶体与电极之间的接触,可使载流子均匀注入晶体有源层,从而获得了均匀电致发光的二极管器件.Organic single crystals have attracted extensive interests in the field of optoelectronic and electronic devices for their high chemical purity, high charge-carrier mobility and high luminescent quantum efficiency. The motivation for research on organic single crystals is their highly arranged packing structure, which provides an ideal model to investigate the basic interactions between the molecules and stacking modes and optoelectronic performance. Because of advantages of these crystals, they have been employed in much functional optoelectronic devices such as organic field-effect transistors（OFETs）, light-emitting organic field-effect transistors（LE-OFETs）, optically pumped lasers, photovoltaic cells and so on. However, the reports on organic single crystal based organic light emitting devices（OLEDs） are scarce. There is a big difficulty in the fabrication of organic single crystal-based OLEDs because of their intrinsic properties like soft, fragile and sensitive to organic solvent. In this work, a simple and non-destructive method template stripping has been applied into the single crystal-based OLEDs to improve the contact problem and realize its bright emission. Based on this method, the physical vapour transport grown crystals are firstly transferred to the modified silicon substrate. Then an anode of 100 nm gold film is deposited on the top of the crystal surface by thermal evaporation with metal mask. After dropping a microliter of photoresist polymer on the device, a glass is pressed on top by its own weight. And the polymer will spread to the edge of the glass and totally cover the device. Then it will be cured after exposed to a UV-light source with a power of 500 W. The device will be transferred to the glass with the help of a knife for separation. Finally the cathode of Ca/Ag will be evaporated on the other side of crystal. The sandwiched structure devices can be achieved by this method. Both anodes and cathodes of the crystal-based OLEDs can be deposited onto the opposite surface of t

关 键 词：有机晶体 噻吩/苯齐聚物晶体 发光二极管 模板剥离法 边发射电致发光 

分 类 号：TN312.8[电子电信—物理电子学]