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Precise Facet Engineering of Perovskite Single Crystals by Ligand-Mediated Strategy

机译：通过配体介导的策略精确平面工程钙钛矿单晶

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摘要

Inorganic-organic hybrid perovskite single crystals are potential materials for the application of high performance optoelectronic devices. The exposed surface of single crystals can dramatically affect the measured properties. Facet-dependent behaviors are also speculated. However, impeded by the lack of facile facet engineering strategy for inorganic organic hybrid perovskites, the relationship between different facets and respective performance remains elusive. In this work, we present a simple approach of ligand-mediated crystal growth to control the shape and the exposed facets of methylammonium lead iodide single crystals. The addition of oleylamine ligand can trigger the continuous morphological transition from dodecahedral-shaped single crystal enclosed by (100)(T) and (112)(T) to cubic-shaped single crystal enclosed by (110)(T) and (002)(T) while maintaining the material composition and crystalline phase. We fabricated single crystal based photodetectors and carried out the first unambiguous study on the relationship between facet structure and device performance. This report opens a new paradigm to reveal the facet dependent properties and to enhance the device performance of single crystal.
机译：无机 - 有机杂交钙钛矿单晶是用于应用高性能光电器件的潜在材料。单晶的暴露表面可以显着影响测量的性质。还推测了围类依赖行为。然而，由于缺乏无机有机杂交钙锌矿的缺乏外分小型工程战略，不同方面与各个性能之间的关系仍然难以捉摸。在这项工作中，我们提出了一种简单的配体介导的晶体生长方法，以控制甲基铅碘化物单晶的形状和暴露的刻面。加入油胺配体可以从（100）（112）（t）包围的十二烷面形单晶的连续形态转变触发到由（110）（t）和（002）包围的立方形单晶（t）同时保持材料组成和结晶相。我们制造了基于单晶的光电探测器，并对各方结构和器件性能之间的关系进行了第一个明确的研究。此报告打开了一个新的范例来揭示方面依赖性属性，并提高单晶的设备性能。

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  • 来源
    《Crystal growth & design》 |2017年第11期|共8页
  • 作者

    Jao Meng-Huan; Lu Chun-Fu; Tai Pao-Yi; Su Wei-Fang;

  • 作者单位

    Natl Taiwan Univ Dept Mat Sci &

    Engn Taipei Taiwan;

    Natl Taiwan Univ Dept Mat Sci &

    Engn Taipei Taiwan;

    Natl Taiwan Univ Dept Mat Sci &

    Engn Taipei Taiwan;

    Natl Taiwan Univ Dept Mat Sci &

    Engn Taipei Taiwan;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 晶体学;
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