摘要
可溶液化处理的有机-无机金属卤化物钙钛矿由于其高光致发光量子效率和带隙可调性已成为发光二极管的理想材料。然而,钙钛矿薄膜中的缺陷是影响器件发光效率和稳定性的主要因素之一,通过下层衬底氧等离子调控可以钝化钙钛矿薄膜中的表面缺陷。本研究使用氧等离子处理法增强聚3,4-乙撑二氧噻吩:聚苯乙烯磺酸(PEDOT:PSS)薄膜衬底的润湿性及光学性能,形成纳米岛,提供更多的成核位点,进而改善钙钛矿发光层的成膜均匀性和发光二极管性能。结果表明,对PEDOT:PSS薄膜衬底进行4min氧等离子处理可以有效改善钙钛矿发光层的成膜质量。在空气中采用全溶液法制备发光器件,其测试启亮电压为3V,最高亮度为237.4cd·m^(-2),最大电流效率为0.1309cd·A^(-1)。
Solution-processable organic-inorganic metal halide perovskite has become an ideal material for lightemitting devices(LEDs)because of its high photoluminescence quantum efficiency and band gap tunability.However,surface defects in perovskite film can be passivated by underlayer oxygen plasma treatment,so as to improve defect recombination which is one of the main factors affecting the luminous efficiency and stability of devices.In this study,Poly(3,4-ethylenedioxythiophene):Polystyrene sulfonate(PEDOT:PSS)films were treated with oxygen plasma to improve its wettability and optical properties,which form small nano-islands to provide more nucleation sites,thereby enhancing the uniformity of perovskite light-emitting layers and the performance of all-solution-processed devices.The results showed that 4min oxygen plasma treatment on PEDOT:PSS film can effectively improve the film-forming quality of perovskite light-emitting layers.The light-emitting device fabricated by all-solution-processed in ambient air has a turn-on voltage of 3V,the maximum luminance of 237.4cd·m^(-2)and the maximum current efficiency of 0.1309cd·A^(-1).
作者
李靖
刘国栋
宋忠铭
王银凤
LI Jing;LIU Guo-dong;SONG Zhong-ming;WANG Yin-feng(College of Bioresources Chemical and Materials Engineering,Shaanxi University of Science&Technology,Xi’an 710021,China;National Demonstration Center for Experimental Light Chemistry Engineering Education,Shaanxi University of Science&Technology,Xi’an 710021,China;Key Lab of Functional Printing and Transport Packaging of China National Light Industry,Shaanxi University of Science&Technology,Xi’an 710021,China;Shaanxi Provincial Key Lab of Papermaking Technology and Specialty Paper Development,Shaanxi University of Science&Technology,Xi’an 710021,China;Key Lab of Paper Based Functional Materials of China National Light Industry,Shaanxi University of Science&Technology,Xi’an 710021,China)
出处
《印刷与数字媒体技术研究》
CAS
北大核心
2023年第3期68-75,91,共9页
Printing and Digital Media Technology Study
基金
国家自然科学基金资助项目(No.22078186)
