Abstract:
:The manipulation of crystal orientation from the thermodynamic equilibrium states is desired in layered hybrid perovskite films to direct charge transport and enhance the perovskite devices performance. Here we report a templated growth mechanism of layered perovskites from 3D-like perovskites which can be a general design rule to align layered perovskites along the out-of-plane direction in films made by both spin-coating and scalable blading process. The method involves suppressing the nucleation of both layered and 3D perovskites inside the perovskite solution using additional ammonium halide salts, which forces the film formation starts from solution surface. The fast drying of solvent at liquid surface leaves 3D-like perovskites which surprisingly templates the growth of layered perovskites, enabled by the periodic corner-sharing octahedra networks on the surface of 3D-like perovskites. This discovery provides deep insights into the nucleation behavior of octahedra-array-based perovskite materials, representing a general strategy to manipulate the orientation of layered perovskites.
journal_name
Nat Communjournal_title
Nature communicationsauthors
Wang J,Luo S,Lin Y,Chen Y,Deng Y,Li Z,Meng K,Chen G,Huang T,Xiao S,Huang H,Zhou C,Ding L,He J,Huang J,Yuan Ydoi
10.1038/s41467-019-13856-1subject
Has Abstractpub_date
2020-01-29 00:00:00pages
582issue
1issn
2041-1723pii
10.1038/s41467-019-13856-1journal_volume
11pub_type
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