Transparent Conductive Single-Walled Carbon Nanotube Networks with Precisely Tunable Ratios of Semiconducting and Metallic Nanotubes

详细信息    查看全文

• 作者：Jeffrey L. Blackburn ; Teresa M. Barnes ; Matthew C. Beard ; Yong-Hyun Kim ; Robert C. Tenent ; Timothy J. McDonald ; Bobby To ; Timothy J. Coutts ; Michael J. Heben
• 刊名：ACS Nano
• 出版年：2008
• 出版时间：June 2008
• 年：2008
• 卷：2
• 期：6
• 页码：1266-1274
• 全文大小：453K
• 年卷期：0
• ISSN：1936-086X

文摘

We present a comprehensive study of the optical and electrical properties of transparent conductive films made from precisely tuned ratios of metallic and semiconducting single-wall carbon nanotubes. The conductivity and transparency of the SWNT films are controlled by an interplay between localized and delocalized carriers, as determined by the SWNT electronic structure, tube−tube junctions, and intentional and unintentional redox dopants. The results suggest that the main resistance in the SWNT thin films is the resistance associated with tube−tube junctions. Redox dopants are found to increase the delocalized carrier density and transmission probability through intertube junctions more effectively for semiconductor-enriched films than for metal-enriched films. As a result, redox-doped semiconductor-enriched films are more conductive than either intrinsic or redox-doped metal-enriched films.