Layered Metal-Halide Perovskite Single-Crystalline Microwire Arrays for Anisotropic Nonlinear Optics,Advanced Functional Materials

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Layered Metal-Halide Perovskite Single-Crystalline Microwire Arrays for Anisotropic Nonlinear Optics
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2021-08-28 , DOI: 10.1002/adfm.202105855
Jinjin Zhao _{1,

2} , Yingjie Zhao _{1,

2} , Yangwu Guo ₃ , Xiuqin Zhan _{2,

4} , Jiangang Feng ₅ , Yue Geng _{1,

2} , Meng Yuan _{1,

2} , Xin Fan _{1,

2} , Hanfei Gao _{1,

3} , Lei Jiang ₁ , Yongli Yan ₄ , Yuchen Wu ₁

Affiliation

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 single-crystalline perovskites arrays is still challenging in regulating liquid dynamics and crystal growth simultaneously. Herein, a capillary-bridge-manipulated strategy is established to steer the dewetting process of microdroplets and provide spatial confinement for crystal growth. These 1D perovskite microwire arrays show regulated geometry, pure orientation, and single crystallinity. Chiral ammonium molecules are introduced into the metal-halide octahedral quantum wells to break the centrosymmetry of the perovskite, allowing the perovskite to exhibit excellent second-order NLO properties. The as-prepared microwire arrays also demonstrate linearly polarized second harmonic generation and two-photon fluorescence. Microwire arrays exhibit higher second harmonic conversion efficiency compared with their polycrystalline thin-film counterparts. It is believed that this strategy for the fabrication of chiral perovskite microstructure arrays holds great promise for NLO integrated applications and opens up an avenue to explore multifunctional chiral perovskites.

中文翻译：

用于各向异性非线性光学器件的层状金属卤化物钙钛矿单晶微线阵列

具有多种结构可调性的混合有机-无机金属卤化物钙钛矿有望用于非线性光学 (NLO) 应用，例如频率转换和电光调制。对于集成 NLO 器件，高质量和多功能的单晶钙钛矿微纳米结构的需求量很大。然而，单晶钙钛矿阵列的制造在同时调节液体动力学和晶体生长方面仍然具有挑战性。在此，建立了一种毛细管桥操纵策略来控制微滴的去湿过程并为晶体生长提供空间限制。这些一维钙钛矿微线阵列显示出规则的几何形状、纯取向和单结晶度。手性铵分子被引入金属卤化物八面体量子阱中，以打破钙钛矿的中心对称性，使钙钛矿表现出优异的二阶非线性光学特性。所制备的微线阵列还表现出线性偏振二次谐波生成和双光子荧光。与它们的多晶薄膜对应物相比，微线阵列表现出更高的二次谐波转换效率。据信，这种用于制造手性钙钛矿微结构阵列的策略对 NLO 集成应用具有广阔的前景，并开辟了探索多功能手性钙钛矿的途径。所制备的微线阵列还表现出线性偏振二次谐波生成和双光子荧光。与它们的多晶薄膜对应物相比，微线阵列表现出更高的二次谐波转换效率。据信，这种用于制造手性钙钛矿微结构阵列的策略对 NLO 集成应用具有广阔的前景，并开辟了探索多功能手性钙钛矿的途径。所制备的微线阵列还表现出线性偏振二次谐波生成和双光子荧光。与它们的多晶薄膜对应物相比，微线阵列表现出更高的二次谐波转换效率。据信，这种用于制造手性钙钛矿微结构阵列的策略对 NLO 集成应用具有广阔的前景，并开辟了探索多功能手性钙钛矿的途径。

更新日期：2021-08-28

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