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Suppression of phase transitions and glass phase signatures in mixed cation halide perovskites

Author

Listed:
  • Mantas Simenas

    (Vilnius University)

  • Sergejus Balciunas

    (Vilnius University)

  • Jacob N. Wilson

    (Imperial College London)

  • Sarunas Svirskas

    (Vilnius University)

  • Martynas Kinka

    (Vilnius University)

  • Andrius Garbaras

    (Center for Physical Sciences and Technology
    Vilnius University)

  • Vidmantas Kalendra

    (Vilnius University)

  • Anna Gagor

    (Polish Academy of Sciences)

  • Daria Szewczyk

    (Polish Academy of Sciences)

  • Adam Sieradzki

    (Wroclaw University of Science and Technology)

  • Miroslaw Maczka

    (Polish Academy of Sciences)

  • Vytautas Samulionis

    (Vilnius University)

  • Aron Walsh

    (Imperial College London
    Yonsei University)

  • Robertas Grigalaitis

    (Vilnius University)

  • Juras Banys

    (Vilnius University)

Abstract

Cation engineering provides a route to control the structure and properties of hybrid halide perovskites, which has resulted in the highest performance solar cells based on mixtures of Cs, methylammonium, and formamidinium. Here, we present a multi-technique experimental and theoretical study of structural phase transitions, structural phases and dipolar dynamics in the mixed methylammonium/dimethylammonium MA1-xDMAxPbBr3 hybrid perovskites (0 ≤ x ≤ 1). Our results demonstrate a significant suppression of the structural phase transitions, enhanced disorder and stabilization of the cubic phase even for a small amount of dimethylammonium cations. As the dimethylammonium concentration approaches the solubility limit in MAPbBr3, we observe the disappearance of the structural phase transitions and indications of a glassy dipolar phase. We also reveal a significant tunability of the dielectric permittivity upon mixing of the molecular cations that arises from frustrated electric dipoles.

Suggested Citation

  • Mantas Simenas & Sergejus Balciunas & Jacob N. Wilson & Sarunas Svirskas & Martynas Kinka & Andrius Garbaras & Vidmantas Kalendra & Anna Gagor & Daria Szewczyk & Adam Sieradzki & Miroslaw Maczka & Vyt, 2020. "Suppression of phase transitions and glass phase signatures in mixed cation halide perovskites," Nature Communications, Nature, vol. 11(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-18938-z
    DOI: 10.1038/s41467-020-18938-z
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