
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.
Item Type: | Journal article |
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Form of publication: | Publisher's Version |
Keywords: | single-walled carbon nanotubes; photoluminescence; excitons; localization; near-field microscopy |
Faculties: | Chemistry and Pharmacy |
Subjects: | 500 Science > 540 Chemistry |
URN: | urn:nbn:de:bvb:19-epub-14504-4 |
ISSN: | 1936-0851 |
Language: | English |
Item ID: | 14504 |
Date Deposited: | 31. Jan 2013, 13:12 |
Last Modified: | 04. Nov 2020, 12:54 |