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A two-dimensional π–d conjugated coordination polymer with extremely high electrical conductivity and ambipolar transport behaviour

2015; Nature Portfolio; Volume: 6; Issue: 1 Linguagem: Inglês

10.1038/ncomms8408

2041-1723

Xing Huang, Ping Sheng, Zeyi Tu, Fengjiao Zhang, Junhua Wang, Hua Geng, Ye Zou, Chong‐an Di, Yuanping Yi, Yimeng Sun, Wei Xu, Daoben Zhu,

Covalent Organic Framework Applications

Abstract Currently, studies on organic two-dimensional (2D) materials with special optic-electronic properties are attracting great research interest. However, 2D organic systems possessing promising electrical transport properties are still rare. Here a highly crystalline thin film of a copper coordination polymer, Cu-BHT (BHT=benzenehexathiol), is prepared via a liquid–liquid interface reaction between BHT/dichloromethane and copper(II) nitrate/H 2 O. The morphology and structure characterization reveal that this film is piled up by nanosheets of 2D lattice of [Cu 3 (C 6 S 6 )] n , which is further verified by quantum simulation. Four-probe measurements show that the room temperature conductivity of this material can reach up to 1,580 S cm −1 , which is the highest value ever reported for coordination polymers. Meanwhile, it displays ambipolar charge transport behaviour and extremely high electron and hole mobilities (99 cm 2 V −1 s −1 for holes and 116 cm 2 V −1 s −1 for electrons) under field-effect modulation.