Single-crystalline hole-transporting layers for efficient and stable organic light-emitting devices
作者机构：State Key Laboratory of Integrated OptoelectronicsCollege of Electronic Science and EngineeringJilin University2699 Qianjin Street130012 ChangchunChina. State Key Laboratory of Supermolecular Structures and MaterialsThe Institute of Theoretical ChemistryJilin University2699 Qianjin Street130012 ChangchunChina. Wuhan National Laboratory for OptoelectronicsHuazhong University of Science and Technology430074 WuhanChina
出 版 物：《Light(Science & Applications)》 (光（科学与应用)（英文版）)
年 卷 期：2024年第13卷第7期
页 面：1341-1353页
核心收录：
基 金：the National Key Research and Development Program of China(Grant Nos.2022YFB3607500 and 2020YFA0715000) Natural Science Foundation of China(Grant Nos.62274076 and 61825402)
主 题：crystalline amorphous charge
摘 要：Efficient charge-carrier injection and transport in organic light-emitting devices(OLEDs)are essential to simultaneously achieving their high efficiency and long-term ***,the charge-transporting layers(CTLs)deposited by various vapor or solution processes are usually in amorphous forms,and their low charge-carrier mobilities,defectinduced high trap densities and inhomogeneous thickness with rough surface morphologies have been obstacles towards high-performance ***,organic single-crystalline(SC)films were employed as the hole-transporting layers(HTLs)instead of the conventional amorphous films to fabricate highly efficient and stable *** highmobility and ultrasmooth morphology of the SC-HTLs facilitate superior interfacial characteristics of both HTL/electrode and HTL/emissive layer interfaces,resulting in a high Haacke’s figure of merit(FoM)of the ultrathin top electrode and low series-resistance joule-heat loss ratio of the ***,the thick and compact SC-HTL can function as a barrier layer against moisture and oxygen *** a result,the SC-OLEDs show much improved efficiency and stability compared to the OLEDs based on amorphous or polycrystalline HTLs,suggesting a new strategy to developing advanced OLEDs with high efficiency and high stability.
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