Highly Conductive and Solution-Processable n-Doped Transparent Organic Conductor

Abstract

Transparent conductors (TCs) play a vital role in displays, solar cells, and emerging printed electronics. Here, we report a solution-processable n-doped organic conductor from copper-catalyzed cascade reactions in the air, which involves oxidative polymerization and reductive doping in one pot. The formed polymer ink is shelf-stable over 20 days and can endure storage temperatures from −20 to 65 °C. The optimized n-doped thin-film TC exhibits a low sheet resistance of 45 Ω/sq and a high transmittance (T 550 > 80%), which can rival indium tin oxide. The transparent organic conductor exhibits excellent durability under accelerated weathering tests (85 °C/85% RH). Furthermore, the n-doped polymer film can also function as an electrode material with a high volumetric capacity. When it is paired with p-doped PEDOT:PSS, a record-high coloration efficiency is obtained in a dual-polymer electrochromic device.

Polymer Semiconductors: Synthesis, Processing, and Applications

“…Similar synthetic ideas are embodied in two small molecules, IID and BDOPV. , Based on their molecular structure, a novel synthetic method of polymerization via aldol condensation reaction was developed (Figure b). , The rotational barrier of the double-bond in these polymers is calculated far more than 30 kcal mol –1 and the torsion angle is calculated as less than 5°. Recently, it was reported that similar structures could be synthesized by an oxidation reaction, , and the rigid coplanar conformation endows the resulting polymer with excellent n-type conductivity over 2000 S cm –1 .…”

Efficient and air-stable n-type doping in organic semiconductors

“…The solution-processable in situ n-type doped conducting polymer, PBFDO, was developed very recently. 66,112 As shown in Fig. 17, the polymerizations started from duroquinone (TMQ) that promoted dimerization by the generation of radicals, and then followed by oxidation dehydrogenation.…”

Electronic and Magnetic Properties of Oligomers and Chains of Poly(benzodifurandione) (PBDF), A Highly Conducting n-Type Polymer

“…[21][22][23] These high carrier density and conductivity values have been confirmed in an independent work based on a different synthetic route with copper-catalyzed cascade reactions also involving oxidative polymerization and reductive doping. 24 In both studies, the conducting polymers have been found to be kinetically and thermodynamically stable. The distinct characteristics of n-type PBDF make it well-suited for potential applications as an organic electrochemical transistor, a thermo-electric device, or a transparent conducting electrode.…”