Lattice dynamics of <math>
  <mrow>
    <mi>CH</mi>
    <msub>
      <mrow>
        <mo>(</mo>
        <msub>
          <mi>NH</mi>
          <mn>2</mn>
        </msub>
        <mo>)</mo>
      </mrow>
      <mn>2</mn>
    </msub>
    <msub>
      <mi>PbI</mi>
      <mn>3</mn>
    </msub>
  </mrow>
</math> and <math>
  <mrow>
    <mi>CH</mi>
    <msub>
      <mrow>
        <mo>(</mo>
        <msub>
          <mi>NH</mi>
          <mn>2</mn>
        </msub>
        <mo>)</mo>
      </mrow>
      <mn>2</mn>
    </msub>
    <msub>
      <mi>SnI</mi>
      <mn>3</mn>
    </msub>
  </mrow>
</math> investigated by inelastic x-ray scattering and comparison of their elastic properties

H. Tamatsukuri; Y. Murakami; N. Saito; N. Ohashi; S. Tsutsui

doi:10.1103/physrevb.110.024301

論文 Lattice dynamics of

CH {({NH}_{2})}_{2} {PbI}_{3}

and

CH {({NH}_{2})}_{2} {SnI}_{3}

investigated by inelastic x-ray scattering and comparison of their elastic properties

H. Tamatsukuri ; Y. Murakami ; N. Saito (National Institute for Materials Science) ; N. Ohashi (National Institute for Materials Science) ; S. Tsutsui

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コレクション

引用

H. Tamatsukuri, Y. Murakami, N. Saito, N. Ohashi, S. Tsutsui. Lattice dynamics of

CH {({NH}_{2})}_{2} {PbI}_{3}

and

CH {({NH}_{2})}_{2} {SnI}_{3}

investigated by inelastic x-ray scattering and comparison of their elastic properties. Physical Review B. 2024, 110 (2), 024301. https://doi.org/10.1103/physrevb.110.024301

(BibTeX)

説明:

(abstract)

Using the inelastic x-ray scattering (IXS) technique, we investigate the lattice dynamics of
inorganic–organic hybrid iodide perovskites FAPbI3 and FASnI3 (FA ≡ CH(NH2)2, formamidinium)
in their cubic α phase and tetragonal β phase. We find that the IXS spectra of FASnI3 are highly
broad at all momentum points, as has been widely observed in the Pb-based halide perovskites. The speeds of sound (phonon group velocities) and absolute values of elastic constants of FASnI3 are smaller than those of FAPbI3 in both phases. In addition, no significant difference in the phonon lifetimes of FAPbI3 and FASnI3 is observed. These results correlate better with the reported ten-dency that the lattice thermal conductivity of ASnX3 is lower than that of APbX3. We discuss that our results also favor the up-conversion mechanism by acoustic phonons in the phonon bottleneck effect for the long lifetime of hot carriers.

権利情報:

In Copyright
©2024 American Physical Society

キーワード: CH(NH2)2PbI3, CH(NH2)2SnI3, inelastic x-ray scattering, phonon

刊行年月日: 2024-07-01

出版者: American Physical Society (APS)

掲載誌:

Physical Review B (ISSN: 24699969) vol. 110 issue. 2 024301

研究助成金:

Ministry of Education, Culture, Sports, Science and Technology JPMXP0112101001
Japan Society for the Promotion of Science 21K04646

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.4650

公開URL: https://doi.org/10.1103/physrevb.110.024301

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更新時刻: 2024-08-10 08:30:26 +0900

MDRでの公開時刻: 2024-08-10 08:30:26 +0900

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