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首页> 外文期刊>Advanced Functional Materials >Organometal Halide Perovskite Quantum Dot Light-Emitting Diodes
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Organometal Halide Perovskite Quantum Dot Light-Emitting Diodes

机译：有机金属卤化物钙钛矿量子点发光二极管

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摘要

Organometal halide perovskites quantum dots (OHP-QDs) with bright, color-tunable, and narrow-band photoluminescence have significant advantages in display, lighting, and laser applications. Due to sparse concentrations and difficulties in the enrichment of OHP-QDs, production of large-area uniform films of OHP-QDs is a challenging task, which largely impedes their use in electroluminescence devices. Here, a simple dip-coating method has been reported to effectively fabricate large-area uniform films of OHP-QDs. Using this technique, multicolor OHP-QDs light-emitting diodes (OQ-LEDs) emitting in blue, blue-green, green, orange, and red color have been successfully produced by simply tuning the halide composition or size of QDs. The blue, green, and red OQ-LEDs exhibited, respectively, a maximum luminance of 2673, 2398, and 986 cd m(-2) at a current efficiency of 4.01, 3.72, and 1.52 cd A(-1), and an external quantum efficiency of 1.38%, 1.06%, and 0.53%, which are much better than most LEDs based on OHP films. The packaged OQ-LEDs show long-term stability in air (humidity approximate to 50%) for at least 7 d. The results demonstrate the great potential of the dip-coating method to fabricate large-area uniform films for various QDs. The high-efficiency OQ-LEDs also demonstrate the promising potential of OHP-QDs for low-cost display, lighting, and optical communication applications.
机译：具有明亮，颜色可调和窄带光致发光的有机金属卤化物钙钛矿量子点（OHP-QDs）在显示，照明和激光应用中具有显着优势。由于稀疏的浓度和OHP-QD富集的困难，生产大面积的OHP-QD均匀薄膜是一项艰巨的任务，这极大地阻碍了它们在电致发光器件中的使用。在这里，已经报道了一种简单的浸涂方法可以有效地制造OHP-QDs的大面积均匀膜。使用此技术，只需调节QD的卤化物成分或大小，就可以成功生产出发出蓝色，蓝绿色，绿色，橙色和红色的OHP-QDs多色发光二极管（OQ-LED）。蓝色，绿色和红色OQ-LED在电流效率分别为4.01、3.72和1.52 cd A（-1）时显示的最大亮度分别为2673、2398和986 cd m（-2）。外部量子效率分别为1.38％，1.06％和0.53％，远高于大多数基于OHP薄膜的LED。包装好的OQ-LED在空气中至少7 d可以显示长期稳定性（湿度约50％）。结果表明，浸涂法具有制造各种QD的大面积均匀膜的巨大潜力。高效的OQ-LED还展示了OHP-QD在低成本显示，照明和光通信应用中的巨大潜力。

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  • 来源
    《Advanced Functional Materials》 |2016年第26期|4797-4802|共6页
  • 作者

    Deng Wei; Xu Xiuzhen; Zhang Xiujuan; Zhang Yedong; Jin Xiangcheng; Wang Liang; Lee Shuit-Tong; Jie Jiansheng;

  • 作者单位

    Soochow Univ, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Inst Funct Nano & Soft Mat FUNSOM, Suzhou 215123, Jiangsu, Peoples R China;

    Soochow Univ, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Inst Funct Nano & Soft Mat FUNSOM, Suzhou 215123, Jiangsu, Peoples R China;

    Soochow Univ, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Inst Funct Nano & Soft Mat FUNSOM, Suzhou 215123, Jiangsu, Peoples R China;

    Soochow Univ, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Inst Funct Nano & Soft Mat FUNSOM, Suzhou 215123, Jiangsu, Peoples R China;

    Soochow Univ, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Inst Funct Nano & Soft Mat FUNSOM, Suzhou 215123, Jiangsu, Peoples R China;

    Soochow Univ, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Inst Funct Nano & Soft Mat FUNSOM, Suzhou 215123, Jiangsu, Peoples R China;

    Soochow Univ, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Inst Funct Nano & Soft Mat FUNSOM, Suzhou 215123, Jiangsu, Peoples R China;

    Soochow Univ, Jiangsu Key Lab Carbon Based Funct Mat & Devices, Inst Funct Nano & Soft Mat FUNSOM, Suzhou 215123, Jiangsu, Peoples R China;

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