Organic Molecular Tuning of Many-Body Interaction Energies in Air-Suspended Carbon Nanotubes
Organic Molecular Tuning of Many-Body Interaction Energies in Air-Suspended Carbon Nanotubes
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DOI：
10.1021/acs.jpcc.8b12496
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发表时间：
2018-12
期刊：
影响因子：
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通讯作者：
S. Tanaka;K. Otsuka;Kensuke Kimura;A. Ishii;H. Imada;Yousoo Kim;Y. Kato
中科院分区：
文献类型：
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作者：
S. Tanaka;K. Otsuka;Kensuke Kimura;A. Ishii;H. Imada;Yousoo Kim;Y. Kato
我们研究了酞菁铜分子对悬浮在空气中的碳纳米管中的激子和三重子的吸附效应。利用光致发光激发光谱，我们观察到激子能量随着分子沉积厚度的增加而逐渐红移。在较大的沉积量下也观察到了三重子发射，这表明酞菁分子和碳纳米管之间存在电荷转移。对单个碳纳米管光谱的分析揭示了激子 - 三重子能量间距和激子发射能量之间的相关性，表明多体相互作用能与分子介电屏蔽的变化规律相似。
We investigate adsorption effects of copper phthalocyanine molecules on excitons and trions in air-suspended carbon nanotubes. Using photoluminescence excitation spectroscopy, we observe that exciton energy red-shifts gradually with the molecular deposition thickness. The trion emission is also observed at large deposition amounts, which indicates charge transfer between the phthalocyanine molecules and carbon nanotubes. Analysis of the spectra for individual tubes reveals a correlation between the exciton–trion energy separation and the exciton emission energy, showing that the many-body interaction energies scale similarly with the molecular dielectric screening.