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首页> 外文期刊>Advanced Functional Materials >Cooling, Scattering, and Recombination-The Role of the Material Quality for the Physics of Tin Halide Perovskites
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Cooling, Scattering, and Recombination-The Role of the Material Quality for the Physics of Tin Halide Perovskites

机译：冷却，散射和复合-材料质量对卤化锡钙钛矿物理性质的作用

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摘要

Tin-based perovskites have long remained a side topic in current perovskite optoelectronic research. With the recent efficiency improvement in thin film solar cells and the observation of a long hot carrier cooling time in formamidinium tin iodide (FASnI(3)), a thorough understanding of the material's photophysics becomes a pressing matter. Since pronounced background doping can easily obscure the actual material properties, it is of paramount importance to understand how different processing conditions affect the observed behavior. Using photoluminescence spectroscopy, thin films of FASnI(3) fabricated through different protocols are therefore investigated. It is shown that hot carrier relaxation occurs much faster in highly p-doped films due to carrier-carrier scattering. From high quality thin films, the longitudinal optical phonon energy and the electron-phonon coupling constant are extracted, which are fundamental to understanding carrier cooling. Importantly, high quality films allow for the observation of a previously unreported state of microsecond lifetime at lower energy in FASnI(3), that has important consequences for the discussion of long lived emission in the field of metal halide perovskites.
机译：锡基钙钛矿长期以来一直是当前钙钛矿光电研究的一个副主题。随着近来薄膜太阳能电池效率的提高以及在甲tin碘化锡（FASnI（3））中观察到较长的热载流子冷却时间，对材料的光物理性质的透彻了解已成为当务之急。由于明显的背景掺杂很容易掩盖实际的材料特性，因此了解不同的加工条件如何影响观察到的行为至关重要。因此，使用光致发光光谱学，研究了通过不同协议制造的FASnI（3）薄膜。结果表明，由于载流子-载流子的散射，在高p掺杂的薄膜中热载流子的松弛发生得更快。从高质量的薄膜中提取了纵向光学声子能量和电子-声子耦合常数，这对于理解载流子冷却至关重要。重要的是，高质量的胶片允许在FASnI（3）中以较低的能量观察以前未报告的微秒寿命状态，这对于讨论金属卤化物钙钛矿领域的长寿命发光具有重要意义。

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  • 来源
    《Advanced Functional Materials》 |2019年第35期|1902963.1-1902963.8|共8页
  • 作者

    Kahmann Simon; Shao Shuyan; Loi Maria A.;

  • 作者单位

    Univ Groningen, Zernike Inst Adv Mat, Photophys & OptoElect, Nijenborgh 4, NL-9747 AG Groningen, Netherlands;

    Univ Groningen, Zernike Inst Adv Mat, Photophys & OptoElect, Nijenborgh 4, NL-9747 AG Groningen, Netherlands;

    Univ Groningen, Zernike Inst Adv Mat, Photophys & OptoElect, Nijenborgh 4, NL-9747 AG Groningen, Netherlands;

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  • 正文语种 eng
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  • 关键词

    hot carriers; metal halide perovskites; photophysics; spectroscopy;

    机译：热载体;金属卤化物蠕动;光药;光谱;

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