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Limits to Electrical Mobility in Lead-Halide Perovskite Semiconductors

Xia, Chelsea Q ; Peng, Jiali ; Poncé, Samuel ; Patel, Jay B ; Wright, Adam D ; Crothers, Timothy W ; Uller Rothmann, Mathias ; Borchert, Juliane ; Milot, Rebecca L ; Kraus, Hans ; Lin, Qianqian ; Giustino, Feliciano ; Herz, Laura M ; Johnston, Michael B

The journal of physical chemistry letters, 2021-04, Vol.12 (14), p.3607-3617 [Periódico revisado por pares]

United States: American Chemical Society

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  • Título:
    Limits to Electrical Mobility in Lead-Halide Perovskite Semiconductors
  • Autor: Xia, Chelsea Q ; Peng, Jiali ; Poncé, Samuel ; Patel, Jay B ; Wright, Adam D ; Crothers, Timothy W ; Uller Rothmann, Mathias ; Borchert, Juliane ; Milot, Rebecca L ; Kraus, Hans ; Lin, Qianqian ; Giustino, Feliciano ; Herz, Laura M ; Johnston, Michael B
  • Assuntos: crystal structure ; electrical properties ; INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY ; Letter ; Physical Insights into Energy Science ; recombination ; scattering ; thin films
  • É parte de: The journal of physical chemistry letters, 2021-04, Vol.12 (14), p.3607-3617
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
    SC0020129; 839217
    Marie Sklodowska-Curie Grant
    USDOE Office of Science (SC), Basic Energy Sciences (BES). Chemical Sciences, Geosciences & Biosciences Division
  • Descrição: Semiconducting polycrystalline thin films are cheap to produce and can be deposited on flexible substrates, yet high-performance electronic devices usually utilize single-crystal semiconductors, owing to their superior charge-carrier mobilities and longer diffusion lengths. Here we show that the electrical performance of polycrystalline films of metal-halide perovskites (MHPs) approaches that of single crystals at room temperature. Combining temperature-dependent terahertz conductivity measurements and ab initio calculations we uncover a complete picture of the origins of charge-carrier scattering in single crystals and polycrystalline films of CH3NH3PbI3. We show that Fröhlich scattering of charge carriers with multiple phonon modes is the dominant mechanism limiting mobility, with grain-boundary scattering further reducing mobility in polycrystalline films. We reconcile the large discrepancy in charge-carrier diffusion lengths between single crystals and films by considering photon reabsorption. Thus, polycrystalline films of MHPs offer great promise for devices beyond solar cells, including light-emitting diodes and modulators.
  • Editor: United States: American Chemical Society
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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