透明单壁碳纳米管薄膜晶体管的设计标准

Design criteria for transparent single-wall carbon nanotube thin-film transistors.

作者信息

Unalan Husnu Emrah, Fanchini Giovanni, Kanwal Alokik, Du Pasquier Aurelien, Chhowalla Manish

机构信息

Materials Science and Engineering, Rutgers University, Piscataway, New Jersey 08854, USA.

出版信息

Nano Lett. 2006 Apr;6(4):677-82. doi: 10.1021/nl052406l.

DOI:10.1021/nl052406l

PMID:16608263

Abstract

A study based on two-dimensional percolation theory yielding quantitative parameters for optimum connectivity of transparent single-wall carbon nanotube (SWNT) thin films is reported. Optimum SWNT concentration in the filtrated solution was found to be 0.1 mg/L with a volume of 30 mL. Such parameters lead to SWNT fractions in the films of approximately Phi = 1.8 x 10(-3), much below the metallic percolation threshold, which is found to be approximately PhiC = 5.5 x 10(-3). Therefore, the performance of transparent carbon nanotube thin-film transistors is limited by the metallic SWNTs, even below their percolation threshold. We show how this effect is related to hopping or tunneling between neighboring metallic tubes.

摘要

报道了一项基于二维渗流理论的研究，该研究得出了用于透明单壁碳纳米管（SWNT）薄膜最佳连通性的定量参数。发现过滤溶液中的最佳SWNT浓度为0.1 mg/L，体积为30 mL。这些参数导致薄膜中的SWNT分数约为Phi = 1.8×10^(-3)，远低于金属渗流阈值，该阈值约为PhiC = 5.5×10^(-3)。因此，透明碳纳米管薄膜晶体管的性能受到金属SWNTs的限制，即使低于它们的渗流阈值。我们展示了这种效应与相邻金属管之间的跳跃或隧穿是如何相关的。