Journal
NANO LETTERS
Volume 7, Issue 10, Pages 2970-2975Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl0710295
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The optical-transport properties of 1D Se-doped CdS nanostructures with different doping contents and/or crystallization degrees are reported. The locally excited photoluminescence shows a significant redshift during the transport along the long axis of the 1D structures and can leave enough PL intensity for detection. The magnitude of the redshift is found to be highly dependent on the content of doping and the crystallization degree. The experimental results are compared with theoretical calculations based on the fundamental absorption rule of the semiconductor, which demonstrates that the redshift is related to the optical reabsorption effects induced by the local structural disorder in the semiconductors. Such optical properties of 1 D semiconductor structures might be of interest for potential applications in color-tunable nanosized light-emitting and/or frequency-converting devices.
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