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首页> 外文期刊>Advanced Functional Materials >Novel Direct Nanopatterning Approach to Fabricate Periodically Nanostructured Perovskite for Optoelectronic Applications
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Novel Direct Nanopatterning Approach to Fabricate Periodically Nanostructured Perovskite for Optoelectronic Applications

机译：用于光电应用的周期性纳米结构钙钛矿的新型直接纳米图案化方法

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摘要

While indirectly patterned organic-inorganic hybrid perovskite nanostructures have been extensively studied for use in perovskite optoelectronic devices, it is still challenging to directly pattern perovskite thin films because perovskite is very sensitive to polar solvents and high-temperature environments. Here, a simple and low-cost approach is proposed to directly pattern perovskite solid-state films into periodic nanostructures. The approach is basically perovskite recrystallization through phase transformation with the presence of a periodic mold on an as-prepared solid-state perovskite film. Interestingly, this study simultaneously achieves not only periodically patterned perovskite nanostructures but also better crystallized perovskites and improved optical properties, as compared to its thin film counterpart. The improved optical properties can be attributed to the light extraction and increased spontaneous emission rate of perovskite gratings. By fabricating light-emitting diodes using the periodic perovskite nanostructure as the emission layers, approximately twofold higher radiance and lower threshold than the reference planar devices are achieved. This work opens up a new and simple way to fabricate highly crystalline and large-area perovskite periodic nanostructures for low-cost production of high-performance optoelectronic devices.
机译：虽然已经对用于钙钛矿光电器件的间接图案化的有机-无机杂化钙钛矿纳米结构进行了广泛的研究，但是直接图案化钙钛矿薄膜仍然具有挑战性，因为钙钛矿对极性溶剂和高温环境非常敏感。在这里，提出了一种简单且低成本的方法来将钙钛矿固态膜直接图案化为周期性纳米结构。该方法基本上是通过在存在的固态钙钛矿薄膜上存在周期性模具的情况下，通过相变使钙钛矿重结晶。有趣的是，与薄膜研究相比，这项研究不仅可以实现周期性地图案化钙钛矿纳米结构，而且可以实现更好的结晶钙钛矿和改善的光学性能。改善的光学性能可归因于钙钛矿光栅的光提取和自发发射速率的提高。通过使用周期性钙钛矿纳米结构作为发光层来制造发光二极管，可以实现比参考平面器件高大约两倍的辐射度和更低的阈值。这项工作为制造低成本低成本生产高性能光电器件的高结晶度和大面积钙钛矿周期性纳米结构开辟了一种新的简单方法。

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  • 来源
    《Advanced Functional Materials》 |2017年第10期|1606525.1-1606525.10|共10页
  • 作者

    Mao Jian; Sha Wei E. I.; Zhang Hong; Ren Xingang; Zhuang Jiaqing; Roy Vellaisamy A. L.; Wong Kam Sing; Choy Wallace C. H.;

  • 作者单位

    Univ Hong Kong, Dept Elect & Elect Engn, Pokfulam Rd, Hong Kong, Hong Kong, Peoples R China;

    Univ Hong Kong, Dept Elect & Elect Engn, Pokfulam Rd, Hong Kong, Hong Kong, Peoples R China;

    Univ Hong Kong, Dept Elect & Elect Engn, Pokfulam Rd, Hong Kong, Hong Kong, Peoples R China;

    Univ Hong Kong, Dept Elect & Elect Engn, Pokfulam Rd, Hong Kong, Hong Kong, Peoples R China;

    City Univ Hong Kong, Dept Phys & Mat Sci, Hong Kong, Hong Kong, Peoples R China;

    City Univ Hong Kong, Dept Phys & Mat Sci, Hong Kong, Hong Kong, Peoples R China;

    Hong Kong Univ Sci & Technol, Dept Phys, Hong Kong, Hong Kong, Peoples R China;

    Univ Hong Kong, Dept Elect & Elect Engn, Pokfulam Rd, Hong Kong, Hong Kong, Peoples R China;

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  • 正文语种 eng
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  • 关键词

    direct nanopatterning; light-emitting diodes; periodic nanostructures; perovskites;

    机译：直接纳米图案;发光二极管;周期性纳米结构;钙钛矿;

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