Building interconnects in carbon nanotube networks with metal halides for transparent electrodes. (June 2015)

• Record Type: Journal Article
• Authors: Zhou, Ying; Shimada, Satoru; Saito, Takeshi; Azumi, Reiko
• Is Part Of: Carbon. Volume 87(2015)
• Page Start: 61
• Page End: 69
• Publication Date: 2015-06
• Subjects: Carbon -- Periodicals; Carbone -- Périodiques; Koolstof; Toepassingen; Electronic journals; 546.681
• DOI: 10.1016/j.carbon.2015.01.031
• Languages: English
• ISSNs: 0008-6223

Abstract

Abstract: Achieving efficient and stable nanotube–nanotube interconnects is of great significance for translating the excellent electrical properties of individual carbon nanotubes (CNTs) to two-dimensional networks. In the present work, a modification technology to build interconnecting nodes in CNT networks with copper-halide crystallites is demonstrated. A pulse photonic curing system is utilized to realize a rapid heating and cooling process at a microsecond timescale. This process enables the manipulation of copper-halide crystallites, which not only results in the formation of nanotube–nanotube interconnecting nodes, but also improves halide p-type doping. As a result, the CNT–halide hybrid films exhibit sheet resistances of 55–65 and 90–110 Ω/sq at 85% and 90% optical transmittance ( λ = 550 nm), respectively. The best dc-to-optical conductivity ratios reach 40. The sheet resistances are extremely stable without any degradation after 1000-h air exposure or 24-h heating at 400 °C, demonstrating their prospective potential for transparent electrodes.