Zhang Jing, Xie Mingchen, Xin Ying, Han Chunmiao, Xie Linghai, Yi Mingdong, Xu Hui
Key Laboratory of Functional Inorganic Material Chemistry, Ministry of Education, School of Chemistry and Materials, Heilongjiang University, 74 Xuefu Road, Harbin, 150080, P. R. China.
Key Laboratory for Organic Electronics and Information Displays &, Institute of Advanced Materials (IAM), Nanjing University of Posts & Telecommunications, 9 Wenyuan Road, Nanjing, 210023, P. R. China.
Angew Chem Int Ed Engl. 2021 Nov 15;60(47):24894-24900. doi: 10.1002/anie.202111320. Epub 2021 Oct 18.
Herein, we report a feasible molecular design of the binuclear clusters featuring the n-p-n heterojunction of biligand-sandwiched inorganic units, which can be used as the effective charge trapper in ambipolar transistor memories with the large memory windows and the energy-saving operation. We found that the hole confinement on the p-type inorganic units is enhanced by spatial electronic anisotropy provided by the peripheral n-type organic phosphine ligands. The steric hindrance of the coordination sites, the insulating effect of the carbon-phosphorous single bonds and the parallel dual-ligand coordination mode jointly elongate the interunit distances to nanometer scale and restrain the intramolecular electronic communications, leading to the tunable and reliable charge trapping. Our results show that the spatial effect is crucial to further amplifying the electronic differences between organic and inorganic units for function enhancement.
在此，我们报道了一种双核簇合物的可行分子设计，其具有双配体夹心无机单元的n-p-n异质结，可作为具有大存储窗口和节能操作的双极晶体管存储器中的有效电荷俘获器。我们发现，外围n型有机膦配体提供的空间电子各向异性增强了p型无机单元上的空穴限制。配位点的空间位阻、碳-磷单键的绝缘作用和平行双配体配位模式共同将单元间距离延长至纳米尺度，并抑制分子内电子通信，从而实现可调谐且可靠的电荷俘获。我们的结果表明，空间效应对于进一步放大有机和无机单元之间的电子差异以增强功能至关重要。
