New long-range sub-structure found in the tetragonal phase of CH3NH3PbI3 single crystals - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Journal of Physics D: Applied Physics Année : 2019

New long-range sub-structure found in the tetragonal phase of CH3NH3PbI3 single crystals

Résumé

Hybrid organic-inorganic perovskites have become one of the most promising low-cost alternatives to traditional semiconductors in the field of photovoltaics and light emitting devices. It combines both attractive features of organic and inorganic materials within a single composite, for instance with excellent electronic properties. We used x-ray diffraction to reveal a sub-structure within CH 3 NH 3 PbI 3 single crystals. We could observe the presence of additional peaks with a square symmetry in several monocrystalline samples. We discuss these results in terms of two different models: a superstructure modulated in two in-plane orthogonal directions, and a model with tilted domains with a shallow angle of ~0.6°. In both cases, the modulated or tilted domains appear in regions with small lattice expansion. We show that this last model appears to be the most likely to explain our observations.
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Dates et versions

hal-02384710 , version 1 (04-12-2019)

Identifiants

Citer

V.L.R. Jacques, A Gallo-Frantz, Antonio Tejeda, D Le Bolloc’h, Ferdinand Lédée, et al.. New long-range sub-structure found in the tetragonal phase of CH3NH3PbI3 single crystals. Journal of Physics D: Applied Physics, 2019, 52, pp.314001. ⟨10.1088/1361-6463/ab202e⟩. ⟨hal-02384710⟩
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