基于量子点和纳米线复合体系的低维柔性光发射器件  

Low-dimensional flexible light-emitting device based on quantum dots&nanowire composite

作　　者：刘春阳 盛羽杰 佟金阳 卢星桥 于长明[1] 母一宁[1] 汪学文 Liu Chunyang;Sheng Yujie;Tong Jinyang;Lu Xingqiao;Yu Changming;Mu Yining;Wang Xuewen(School of Physics,Changchun University of Science and Technology,Changchun 130022,China;Jilin Provincial Institute of Culture and Technology,Changchun 130012,China)

机构地区：[1]长春理工大学物理学院,吉林长春130022 [2]吉林省文化科技研究所,吉林长春130012

出　　处：《红外与激光工程》2023年第10期139-148,共10页Infrared and Laser Engineering

基　　金：吉林省教育厅2021年度科学技术研究规划重点项目(JJKH20210800KJ);吉林省产业创新专项资金项目(2019C043-6)。

摘　　要：柔性自发光器件是当前照明和显示领域的前沿课题。相比有机发光二极管,无机半导体具有更稳定的物理化学性质,但晶态无机薄膜不具有良好柔韧性,因此,低维纳米线阵列结构成为柔性器件研究新的突破方向。铯铅卤化物钙钛矿量子点具有高发光量子产率,将钙钛矿量子点作为荧光层分散在纳米线阵列中,可以利用钙钛矿材料的高荧光效率,实现可见波段柔性器件。首先制备了氧化锌(ZnO)/氧化镁(MgO)纳米线阵列异质结构,在柔性锌箔基片上构建了金属/绝缘体/半导体异质结光发射器件,实现了源自ZnO纳米线的本征紫外发射和电泵浦紫外随机激光。进而采用纳米线异质结作为短波长激发源、钙钛矿量子点作为荧光层,实现了柔性荧光型暖白光原型器件。Objective Flexible self-luminescent devices are the frontier subject in the field of illumination and display.Compared to organic light-emitting diodes,inorganic semiconductors offer more stable physical and chemical properties.However,crystalline inorganic films do not have good flexibility and are easy to crack after bending.Low-dimensional nanowire array structures have become a new breakthrough in the research of flexible devices.Wide bandgap semiconductor zinc oxide(ZnO)is an ideal material for developing short wavelength luminescence and laser devices.ZnO is also one of the most researched nanomaterials currently.Recently,all inorganic cesium lead halide perovskite materials(CsPbX_(3)(X=I,Br,Cl))have sparked a new research boom due to their excellent optical properties.Cesium lead halide perovskite quantum dots have high luminescent quantum yields.By dispersing perovskite quantum dots as fluorescent layers in nanowire arrays,the high fluorescence efficiency of perovskite materials can be utilized to achieve visible band flexible devices.Methods ZnO nanowire array was prepared by hydrothermal synthesis method.Zinc foil was used as a flexible substrate.Due to the polycrystalline nature of the zinc foil substrate and the random orientation of surface Zn grains,nano ZnO layer was deposited on the pre-cleaned substrate surface by sputtering method as the seed layer for nanowire growth(Fig.1).In order to construct MIS heterojunction devices,MgO layer was deposited on the surface of ZnO nanowire arrays by magnetron sputtering.Au electrode with a diameter of 1 mm was deposited on the surface of MgO layer using thermal evaporation method and mask technology.The MIS junction light emitting device based on ZnO/MgO nanowire array heterostructure was constructed(Fig.9).Then,CsPbBr_(3)&CsPbI_(3) perovskite quantum dots were prepared by thermal injection method.Lastly,CsPbBr_(3)&CsPbI_(3)quantum dots/PMMA saturated solution were spin coated and dispersed into the ZnO nanowire array to form a packaging layer.Using MIS hete

关 键 词：柔性光发射器件 氧化锌纳米线 钙钛矿量子点 电泵浦激光 荧光型发光二极管 

分 类 号：O469[理学—凝聚态物理]