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

By Xing Huang, P. Sheng, Zeyi Tu, Fengjiao Zhang, Junhua Wang, Hua Geng, Ye Zou, Chong‐an Di, Yuanping Yi, Yimeng Sun and 2 more. Nature Communications, 2015

693 citations recorded by the source corpus.

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/H2O. The morphology and structure characterization reveal that this film is piled up by nanosheets of 2D lattice of [Cu3(C6S6)]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 cm2V−1s−1 for holes and 116 cm2V−1s−1 for electrons) under field-effect modulation. Conjugated 2D materials are able to marry the properties of transparency and conductivity for implementation in a wide range of devices. Here, Huang and et al.adopt this design principal in synthesizing a copper bis(dithiolene) coordination polymer which exhibits remarkable electronic performances.

Subfields: Electronic, Optical and Magnetic Materials, Inorganic Chemistry, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/df5a7f948c63dddb55a5b2b62ce5d6250c95af7b