Abstract
We observe localization of excitons in semiconducting single-walled carbon nanotubes at room temperature using high-resolution near-field photoluminescence (PL) microscopy. Localization is the result of spatially confined exciton energy minima with depths of more than 15 meV connected to lateral energy gradients exceeding 2 meV/nm as evidenced by energy-resolved PL imaging. Simulations of exciton diffusion in the presence of energy variations support this interpretation predicting strongly enhanced PL at local energy minima.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 5914-5920 |
| Number of pages | 7 |
| Journal | ACS nano |
| Volume | 4 |
| Issue number | 10 |
| DOIs | |
| State | Published - Oct 26 2010 |
| Externally published | Yes |
Keywords
- excitons
- localization
- near-field microscopy
- photoluminescence
- single-walled carbon nanotubes
ASJC Scopus subject areas
- General Materials Science
- General Engineering
- General Physics and Astronomy
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