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A Cu3BHT-Graphene van der Waals Heterostructure with Strong Interlayer Coupling for Highly Efficient Photoinduced Charge Separation
Advanced Materials ( IF 27.4 ) Pub Date : 2024-02-21 , DOI: 10.1002/adma.202311454
Zhiyong Wang 1, 2 , Shuai Fu 2, 3 , Wenjie Zhang 1 , Baokun Liang 4 , Tsai-Jung Liu 2 , Mike Hambsch 5 , Jonas F Pöhls 6 , Yufeng Wu 1 , Jianjun Zhang 2 , Tianshu Lan 1 , Xiaodong Li 1, 2 , Haoyuan Qi 4 , Miroslav Polozij 2, 7 , Stefan C B Mannsfeld 5 , Ute Kaiser 4 , Mischa Bonn 3 , R Thomas Weitz 6 , Thomas Heine 2, 7, 8 , Stuart S P Parkin 1 , Hai I Wang 3, 9 , Renhao Dong 2, 10 , Xinliang Feng 1, 2
Advanced Materials ( IF 27.4 ) Pub Date : 2024-02-21 , DOI: 10.1002/adma.202311454
Zhiyong Wang 1, 2 , Shuai Fu 2, 3 , Wenjie Zhang 1 , Baokun Liang 4 , Tsai-Jung Liu 2 , Mike Hambsch 5 , Jonas F Pöhls 6 , Yufeng Wu 1 , Jianjun Zhang 2 , Tianshu Lan 1 , Xiaodong Li 1, 2 , Haoyuan Qi 4 , Miroslav Polozij 2, 7 , Stefan C B Mannsfeld 5 , Ute Kaiser 4 , Mischa Bonn 3 , R Thomas Weitz 6 , Thomas Heine 2, 7, 8 , Stuart S P Parkin 1 , Hai I Wang 3, 9 , Renhao Dong 2, 10 , Xinliang Feng 1, 2
Affiliation
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Two-dimensional van der Waals heterostructures (2D vdWhs) are of significant interest due to their intriguing physical properties critically defined by the constituent monolayers and their interlayer coupling. Synthetic access to 2D vdWhs based on chemically tunable monolayer organic 2D materials remains challenging. Herein, the fabrication of a novel organic–inorganic bilayer vdWh by combining π-conjugated 2D coordination polymer (2DCP, i.e., Cu3BHT, BHT = benzenehexathiol) with graphene is reported. Monolayer Cu3BHT with detectable µm2-scale uniformity and atomic flatness is synthesized using on-water surface chemistry. A combination of diffraction and imaging techniques enables the determination of the crystal structure of monolayer Cu3BHT with atomic precision. Leveraging the strong interlayer coupling, Cu3BHT-graphene vdWh exhibits highly efficient photoinduced interlayer charge separation with a net electron transfer efficiency of up to 34% from Cu3BHT to graphene, superior to those of reported bilayer 2D vdWhs and molecular-graphene vdWhs. This study unveils the potential for developing novel 2DCP-based vdWhs with intriguing physical properties.
中文翻译：
一种具有强层间耦合的 Cu3BHT-石墨烯范德华异质结构，可实现高效光生电荷分离
二维范德华异质结构（2D vdWhs）因其有趣的物理性质而受到人们的极大关注，这些物理性质由组成的单层及其层间耦合严格定义。基于化学可调谐单层有机二维材料合成二维 vdWh 仍然具有挑战性。在此，报道了通过将π-共轭二维配位聚合物（2DCP，即Cu 3 BHT，BHT = 苯六硫醇）与石墨烯相结合来制备新型有机-无机双层vdWh。使用水面化学合成具有可检测的 µm 2尺度均匀性和原子平坦度的单层 Cu 3 BHT。衍射和成像技术的结合能够以原子精度测定单层 Cu 3 BHT 的晶体结构。利用强层间耦合，Cu 3 BHT-石墨烯 vdWh 表现出高效的光致层间电荷分离，从 Cu 3 BHT 到石墨烯的净电子转移效率高达 34%，优于报道的双层 2D vdWh 和分子石墨烯 vdWh 。这项研究揭示了开发具有有趣物理特性的新型基于 2DCP 的 vdWh 的潜力。
更新日期：2024-02-21
中文翻译：
一种具有强层间耦合的 Cu3BHT-石墨烯范德华异质结构，可实现高效光生电荷分离
二维范德华异质结构（2D vdWhs）因其有趣的物理性质而受到人们的极大关注，这些物理性质由组成的单层及其层间耦合严格定义。基于化学可调谐单层有机二维材料合成二维 vdWh 仍然具有挑战性。在此，报道了通过将π-共轭二维配位聚合物（2DCP，即Cu 3 BHT，BHT = 苯六硫醇）与石墨烯相结合来制备新型有机-无机双层vdWh。使用水面化学合成具有可检测的 µm 2尺度均匀性和原子平坦度的单层 Cu 3 BHT。衍射和成像技术的结合能够以原子精度测定单层 Cu 3 BHT 的晶体结构。利用强层间耦合，Cu 3 BHT-石墨烯 vdWh 表现出高效的光致层间电荷分离，从 Cu 3 BHT 到石墨烯的净电子转移效率高达 34%，优于报道的双层 2D vdWh 和分子石墨烯 vdWh 。这项研究揭示了开发具有有趣物理特性的新型基于 2DCP 的 vdWh 的潜力。
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