Intraexciton Transitions Observed in High Stability Doped Single-Wall Carbon Nanotube Films and Solutions

详细信息    查看全文

• 作者：Neale O. Haugen ; Adam B. Phillips ; Tieneke E. Dykstra ; Suneth Watthage ; Michael J. Heben ; Randy J. Ellingson
• 刊名：Journal of Physical Chemistry C
• 出版年：2014
• 出版时间：October 30, 2014
• 年：2014
• 卷：118
• 期：43
• 页码：25253-25260
• 全文大小：397K
• ISSN：1932-7455

文摘

Normally hidden excited state transitions were observed in large diameter single-walled carbon nanotubes for the first time by controlling the degree of doping. With increased doping, the normally observed photoinduced bleach (PB) signal associated with the creation of excitons switched to a photoinduced absorption (PA). A delay in the onset of the PA signal made it clear that the absorption was due to an intraexcitonic transition. The study was afforded by the development of novel methods that allowed samples to be reproducibly and stably prepared in specific states. Our results further the understanding of the photophysics of large diameter single-walled carbon nanotube materials, which are promising for a variety of optoelectronic applications.