Electronic Structure and Chemical Nature of Oxygen Dopant States in Carbon Nanotubes
Electronic Structure and Chemical Nature of Oxygen Dopant States in Carbon Nanotubes
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DOI：
10.1021/nn504553y
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发表时间：
2014-10-01
期刊：
影响因子：
17.1
通讯作者：
Htoon, Han
中科院分区：
文献类型：
--
作者：
Ma, Xuedan;Adamska, Lyudmyla;Htoon, Han
我们进行了低温光致发光（PL）的研究个别氧掺杂的单壁碳纳米管（SWCNT）和相关的电子结构模拟我们的观察。我们的实验揭示了多个尖锐的非对称发射峰在能量50-300 meV红移的E-11明亮的激子峰。我们的模拟表明，这些峰值与深陷阱状态绑定到不同的特定化学加合物的协会。此外，还观察到氧掺杂使E-11激子分裂成两个或更多个具有能量分裂的态
We performed low temperature photoluminescence (PL) studies on individual oxygen-doped single-walled carbon nanotubes (SWCNTs) and correlated our observations to electronic structure simulations. Our experiment reveals multiple sharp asymmetric emission peaks at energies 50-300 meV red-shifted from that of the E-11 bright exciton peak. Our simulation suggests an association of these peaks with deep trap states tied to different specific chemical adducts. In addition, oxygen doping is also observed to split the E-11 exciton into two or more states with an energy splitting