Strain Mediated Second Harmonic Generation Enhancement of Bimetallic Metal-Organic Frameworks
发布时间：2024-10-26
点击次数：
DOI码：10.1021/acs.jpclett.4c02915
发表刊物：J. Phys. Chem. Lett. 2024
摘要：Triggered by the demand of developing practical metal–organic framework (MOF) based nonlinear optical (NLO) devices, there is a surge of research interest in the regulation of NLO properties of MOFs. Strain engineering provides a new opportunity to regulate the optoelectronic properties of materials and device performance at the interface. Here we introduce the induction of the strain field in structures by constructing bimetallic Zn/Cu-MOFs. The NLO response of MOF1–9 with different metal element ratios was characterized in the near-infrared window. Surprisingly, MOF3 exhibited a giant second harmonic generation (SHG) enhancement compared with that of pristine Zn- and Cu-MOF. The determined second-order nonlinear susceptibility of MOF3 (∼19.86 pmV–1) is one order of magnitude larger than that of pristine Zn-MOF (1.65 pmV–1) and Cu-MOF (3.88 pmV–1) and much higher than the commonly used NLO crystals. Moreover, the anisotropy ratios of MOF1–9 can be harnessed in a wide range (∼4.7–118.8). The anisotropy ratio of MOF4 (∼118.8) is much higher than that of the most excellent 2D material to date, to our best knowledge. A first-order perturbation of second-order polarization based on point group description was introduced to explore the regulation mechanism of the NLO response under the strain field of MOFs.
合写作者：Defeng Xu, Yihang Ouyang, Hua Zhang, Lijuan Liu, Jianqiao Meng, Si Xiao
第一作者：Menglong Zhu
论文类型：期刊论文
通讯作者：Zhihui Chen*, Jun He*
卷号：15
页面范围：12120–12128
是否译文：否
发表时间：2024-11-27
收录刊物：SCI