A photodegradable hexaaza-pentacene molecule for selective dispersion of large-diameter semiconducting carbon
Jie Han1, Qiyan Ji1, Hongbo Li1
1Key Laboratory of Nanodevices and Applications, Suzhou Institute of Nanotech and Nanobionics, Chinese Academy of Science, Suzhou 215123, P. R. China. sqiu2010@sinano.ac.cn qwli2007@sinano.ac.cn.
Abstract:
Harvesting high-purity semiconducting single-walled carbon nanotubes (s-SWCNTs) with removable dispersants remains a challenge. In this work, we demonstrate that small heteroacene derivatives may serve as promising selective dispersants for sorting s-SWCNTs. A rich N "doped" and thiophene-substituted hexaazapentacene molecule, denoted as 4HP, was found to be more favorable for high-purity s-SWCNTs with large diameters. Importantly, 4HP is photodegradable under 365 nm or blue light, which enables a simple deposition approach for the formation of clean s-SWCNT networks. The as-fabricated thin film transistors show excellent performance with a charge-mobility of 30-80 cm(2) V(-1) s(-1) and an on-off ratio of 10(4)-10(6).
