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Mapping Morphological and Structural Properties of Lead Halide Perovskites by Scanning Nanofocus XRD

机译：扫描纳米聚焦XRD绘制卤化钙钛矿的形态和结构特性

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摘要

Scanning nanofocus X-ray diffraction (nXRD) performed at a synchrotron is used to simultaneously probe the morphology and the structural properties of spin-coated CH3NH3PbI3 (MAPI) perovskite films for photovoltaic devices. MAPI films are spin-coated on a Si/SiO2/poly(3,4-ethylenedioxythiophene): polystyrene sulfonate (PEDOT:PSS) substrate held at different temperatures during the deposition in order to tune the perovskite film coverage. The films are then investigated using nXRD and scanning electron microscopy (SEM). The advantages of nXRD over SEM and other techniques are discussed. A method to visualize, selectively isolate, and structurally characterize single perovskite grains buried within a complex, polycrystalline film is developed. The results of nXRD measurements are correlated with solar cell device measurements, and it is shown that spin-coating the perovskite precursor solution at elevated temperatures leads to improved surface coverage and enhanced solar cell performance.
机译：在同步加速器中进行的扫描纳米聚焦X射线衍射（nXRD）用于同时探测用于光电器件的旋涂CH3NH3PbI3（MAPI）钙钛矿薄膜的形态和结构特性。将MAPI膜旋涂在沉积期间保持在不同温度的Si / SiO2 /聚（3,4-乙撑二氧噻吩）：聚苯乙烯磺酸盐（PEDOT：PSS）基板上，以调节钙钛矿膜的覆盖率。然后使用nXRD和扫描电子显微镜（SEM）研究薄膜。讨论了nXRD相对于SEM和其他技术的优势。开发了一种可视化，选择性隔离和结构表征复杂多晶膜中埋藏的钙钛矿晶粒的方法。 nXRD测量的结果与太阳能电池设备的测量结果相关，结果表明，在高温下旋涂钙钛矿前体溶液可改善表面覆盖率并增强太阳能电池性能。

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  • 来源
    《Advanced Functional Materials》 |2016年第45期|8221-8230|共10页
  • 作者

    Lilliu Samuele; Dane Thomas G.; Alsari Mejd; Griffin Jonathan; Barrows Alexander T.; Dahlem Marcus S.; Friend Richard H.; Lidzey David G.; Macdonald J. E.;

  • 作者单位

    Univ Sheffield, Dept Phys & Astron, Hicks Bldg,Hounsfield Rd, Sheffield S3 7RH, S Yorkshire, England;

    European Synchrotron Radiat Facil, BP 220, F-38043 Grenoble, France;

    Univ Cambridge, Cavendish Lab, Madingley Rd, Cambridge CB3 0HE, England;

    Univ Sheffield, Dept Phys & Astron, Hicks Bldg,Hounsfield Rd, Sheffield S3 7RH, S Yorkshire, England;

    Univ Sheffield, Dept Phys & Astron, Hicks Bldg,Hounsfield Rd, Sheffield S3 7RH, S Yorkshire, England;

    Masdar Inst Sci & Technol, POB 54224, Abu Dhabi, U Arab Emirates;

    Univ Cambridge, Cavendish Lab, Madingley Rd, Cambridge CB3 0HE, England;

    Univ Sheffield, Dept Phys & Astron, Hicks Bldg,Hounsfield Rd, Sheffield S3 7RH, S Yorkshire, England;

    Cardiff Univ, Sch Phys & Astron, Queens Bldg, Cardiff CF24 3AA, S Glam, Wales;

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