Dimensional Control of Highly Anisotropic and Transparent Conductive Coordination Polymers for Solution‐Processable Large‐Scale 2D Sheets. Issue 2 (20th November 2022)

• Record Type: Journal Article
• Authors: Suh, Bong Lim; Kang, Goun; Yoon, Sun Mi; Cho, Sanghyun; Moon, Myoung‐Woon; Sung, Yun‐Mo; Kim, Min‐Seok; Hur, Kahyun
• Is Part Of: Advanced materials. Volume 35:Issue 2(2023)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2022-11-20
• Subjects: 2D materials -- dimension control -- nanosheets -- polarons -- transparent electrodes; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adma.202206980
• Languages: English
• ISSNs: 0935-9648

Abstract

Abstract: Controlling the dimensional aspect of conductive coordination polymers is currently a key scientific interest. Herein, solution‐based dimension control strategies are proposed for copper chloride thiourea (CuCl‐TU) coordination polymers that enable centimeter‐scale, 2D nanosheet formation for use as transparent electrodes. Despite the wide bandgap of CuCl‐TU polymers (4.33 eV), through polaron‐mediated electron transfer, the electrical conductivity of the 2D sheet at room temperature is able to reach 4.45 S cm −1 without intentional doping. This leads to a highly anisotropic electronic conductivity of up to the order of ≈10 3 differences, depending on the material orientation. Furthermore, by substituting alternative thiourea candidates, it is demonstrated that it is possible to predesign CuCl‐TU structures with the desired functionality, stability, and porosity through dimensional control. These findings provide a blueprint to design next‐generation transparent conducting materials that can operate at room temperature, thereby expanding their applicability to different fields. Abstract : The material dimension of copper‐halide coordination polymers can be controlled for 1D, 2D, and 3D via solution‐based strategies. The coordination polymer exhibits a highly anisotropic electronic conductivity of up to ≈1000 differences through polaron‐mediated electron transfer. The dimensional control and intrinsic anisotropy add a new degree of freedom to the excitation, detection, and control of electrons and photons.