Hydration Intermediate Phase Regulated In‐Plane and Out‐Plane Epitaxy Growth of Oriented Nano‐Array Structures on Perovskite Single Crystals

Fabrication of organic–metal‐halide perovskite micro‐nano array structures draws attention to the potential application in polarized light, high‐resolution X‑ray imaging, light‐emitting diodes, and lasers. However, it is still challenging to achieve the growth of controllable long‐range ordered nano...

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Published in:Small (Weinheim an der Bergstrasse, Germany) Germany), 2022-04, Vol.18 (16), p.e2107915-n/a
Main Authors: Li, Xiaohui, Li, Hanming, Bi, Weihui, Song, Yilong, Ge, Chengda, Wang, Anran, Wang, Zisheng, Hao, Mingwei, Kang, Yifei, Yang, Yang, Dong, Qingfeng
Format: Article
Language:English
Subjects:
2D perovskite single crystals
Arrays
Calcium Compounds - chemistry
Crystal structure
Crystals
Epitaxial growth
epitaxy growth
Hydration
Light emitting diodes
Nanorods
Nanostructures - chemistry
Nanotechnology
Oxides - chemistry
perovskite nanowire arrays
perovskite single crystals
Perovskites
polarization emission
Polarized light
Single crystals
Spontaneous emission
Titanium - chemistry
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Summary:Fabrication of organic–metal‐halide perovskite micro‐nano array structures draws attention to the potential application in polarized light, high‐resolution X‑ray imaging, light‐emitting diodes, and lasers. However, it is still challenging to achieve the growth of controllable long‐range ordered nanostructure arrays by chemical solution‐based techniques. Herein, controllable epitaxial growth of long‐range ordered micro‐nano arrays on MAPbI3 single crystal (SC) surface is reported. A hydrated intermediate phase is found that can effectively regulate in‐plane and out‐plane orientated growth, respectively. This is attributed to the regulation of growth thermodynamics by hydration 0D perovskite intermediate phase enabling free recombination of PbI42– octahedral cages. Further, it is found that the degree of hydration is the key to the realization of in‐plane and out‐plane growth. Meanwhile, polarization emission and amplified spontaneous emission property are observed in highly oriented nanorod arrays with potential applications in anti‐counterfeiting polarized emission. A solution‐process synthesis strategy is developed for controllable epitaxial growth of long‐range ordered micro‐nano arrays on MAPbI3 single crystal (SC) surface. In‐plane and out‐plane orientated growth can be regulated by introducing a 0D perovskite hydrated intermediate phase, which attributes potential applications in functional imaging and polarized emission.
ISSN:1613-6810
1613-6829
DOI:10.1002/smll.202107915