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Two-Dimensional Conjugated Metal-Organic Framework/Graphene π–π Stacked Heterostructures for Ultrafast Photonics
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2023-12-07 , DOI: 10.1002/adfm.202313027 Jiahao Chen 1 , Yingtian Xu 1 , Yang Liu 1 , Heng Liu 2 , He Zhang 1 , Liang Jin 1 , Linlin Shi 1 , Yunping Lan 1 , Yonggang Zou 1 , Jie Fan 1
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2023-12-07 , DOI: 10.1002/adfm.202313027 Jiahao Chen 1 , Yingtian Xu 1 , Yang Liu 1 , Heng Liu 2 , He Zhang 1 , Liang Jin 1 , Linlin Shi 1 , Yunping Lan 1 , Yonggang Zou 1 , Jie Fan 1
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2D conjugated metal-organic frameworks (MOFs) with high in-plane-π-conjugation are attracting significant attention in various fields owing to their outstanding electrical transport property, substantial specific surface areas, and tunable structures. However, their potential in ultrafast photonics has not been extensively explored. Herein, 2D conjugated Ni3(HITP)2 metal-organic framework (MOF) and graphene (GR) π–π stacked vertical heterostructures (NG-VHS) are synthesized using an ultrasound-assisted method. Based on theoretical simulations and characterization analyses, the results suggest that the fast interface charge transfer and the extension of the π-conjugated electron cloud will significantly enhance the electrical conductivity and the nonlinear optical properties, which is attributed to the π–π stacking interactions between Ni3(HITP)2 and GR. The charge transfer rate of NG-VHS is given by 6.9 × 1011 s−1. Noticeably, NG-VHS can serve as an excellent saturable absorber (SA) that can achieve fundamental mode-locking with a pulse width of 451 fs, harmonic mode-locking with repetition frequencies up to 1.205 GHz, and tunable dual-wavelength mode-locking. These results indicate the potential of NG-VHS as a promising nonlinear optical material for ultrafast optical applications and a new platform for the design of advanced optoelectronic devices based on 2D conjugated MOFs.
中文翻译：
用于超快光子学的二维共轭金属有机框架/石墨烯π-π堆叠异质结构
具有高面内π共轭的二维共轭金属有机框架（MOF）由于其出色的电传输性能、巨大的比表面积和可调谐结构而在各个领域引起了广泛关注。然而，它们在超快光子学方面的潜力尚未得到广泛探索。在此，使用超声辅助方法合成了二维共轭Ni 3 (HITP) 2金属有机框架(MOF)和石墨烯(GR) π-π堆叠垂直异质结构(NG-VHS)。基于理论模拟和表征分析，结果表明，快速界面电荷转移和π共轭电子云的扩展将显着增强导电性和非线性光学性质，这归因于之间的π-π堆积相互作用Ni 3 (HITP) 2和GR。NG-VHS的电荷转移率由6.9×10 11 s -1给出。值得注意的是，NG-VHS可以作为一种优秀的可饱和吸收体（SA），可以实现脉冲宽度为451 fs的基本锁模、重复频率高达1.205 GHz的谐波锁模以及可调谐双波长锁模。这些结果表明 NG-VHS 作为超快光学应用的有前景的非线性光学材料以及基于 2D 共轭 MOF 的先进光电器件设计的新平台的潜力。
更新日期：2023-12-07
中文翻译：
用于超快光子学的二维共轭金属有机框架/石墨烯π-π堆叠异质结构
具有高面内π共轭的二维共轭金属有机框架（MOF）由于其出色的电传输性能、巨大的比表面积和可调谐结构而在各个领域引起了广泛关注。然而，它们在超快光子学方面的潜力尚未得到广泛探索。在此，使用超声辅助方法合成了二维共轭Ni 3 (HITP) 2金属有机框架(MOF)和石墨烯(GR) π-π堆叠垂直异质结构(NG-VHS)。基于理论模拟和表征分析，结果表明，快速界面电荷转移和π共轭电子云的扩展将显着增强导电性和非线性光学性质，这归因于之间的π-π堆积相互作用Ni 3 (HITP) 2和GR。NG-VHS的电荷转移率由6.9×10 11 s -1给出。值得注意的是，NG-VHS可以作为一种优秀的可饱和吸收体（SA），可以实现脉冲宽度为451 fs的基本锁模、重复频率高达1.205 GHz的谐波锁模以及可调谐双波长锁模。这些结果表明 NG-VHS 作为超快光学应用的有前景的非线性光学材料以及基于 2D 共轭 MOF 的先进光电器件设计的新平台的潜力。
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