2021
DOI: 10.1002/adfm.202105855
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Layered Metal‐Halide Perovskite Single‐Crystalline Microwire Arrays for Anisotropic Nonlinear Optics

Abstract: Hybrid organic-inorganic metal-halide perovskites with diverse structure tunability are promising for nonlinear-optical (NLO) applications, such as frequency conversion and electro-optic modulation. For integrated NLO devices, single-crystalline perovskite micro-and nanostructures with high quality and multifunctionality are in high demand. However, the fabrication of singlecrystalline perovskites arrays is still challenging in regulating liquid dynamics and crystal growth simultaneously. Herein, a capillary-b… Show more

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Cited by 41 publications
(34 citation statements)
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“…6,7 Benefitting from their reversible, controllable, and in situ SHG switching features, these kind of materials are considered to have great potential applications in optical devices as a light-sensor, environmental monitor, data storage, and optical communication carrier. 8,9 As solid-state "SHG switches", it should have at least two states, namely a noncentrosymmetric (NCS) state, and a centrosymmetric (CS) state. A reversible structural phase transition accompanied by SHG response meets the nature of this switch and the phase transition point is the crucial point that regulates the SHG signals.…”
Section: Introductionmentioning
confidence: 99%
“…6,7 Benefitting from their reversible, controllable, and in situ SHG switching features, these kind of materials are considered to have great potential applications in optical devices as a light-sensor, environmental monitor, data storage, and optical communication carrier. 8,9 As solid-state "SHG switches", it should have at least two states, namely a noncentrosymmetric (NCS) state, and a centrosymmetric (CS) state. A reversible structural phase transition accompanied by SHG response meets the nature of this switch and the phase transition point is the crucial point that regulates the SHG signals.…”
Section: Introductionmentioning
confidence: 99%
“…25,26 Creatively, to overcome the unfavorable ion migration and poor stability, researchers introduced organic molecules into the perovskite structure to form a two-dimensional (2D) perovskite, in which lead halide octahedral sheets are separated by an organic spacer. [27][28][29][30][31][32][33] The organic spacer increases the activation energy of ion transport and therefore inhibits ion migration. 34,35 Furthermore, due to the steric hindrance produced by the organic spacer, it will increase the required for the phase transition to the non-perovskite phase, therefore improving the stability of the perovskite.…”
Section: Introductionmentioning
confidence: 99%
“…[21][22][23] The structural instability of HPs becomes pronounced as the pattern dimension decreases to the sub-100 nm scale as a result of the increased surface-to-volume ratio, making them significantly unstable in ambient conditions. Diverse unconventional patterning methods have been employed based on soft lithography, such as imprinting, [24,25] micromolding, [26,27] ink-jet printing, [28] capillary bridge method, [29] wettability surface control, [30,31] and micro/nanopumping, [32] giving rise to well-defined patterns of HPs on the micrometer and few-hundred-nanometer scales without harming their intrinsic photophysical properties. However, further scaling down of the pattern size to sub-100 nm is challenging because of the difficulty in not only controlling the crystallization of HPs in such small dimensions but also ensuring the environmental stability of the patterned crystals.…”
Section: Introductionmentioning
confidence: 99%