Low temperature photoluminescence imaging and time-resolved spectroscopy of single CdS nanowires

Details Low temperature photoluminescence imaging and time-resolved spectroscopy of single CdS nanowires Low temperature photoluminescence imaging and time-resolved spectroscopy of single CdS nanowires

2006-06-15

arxiv.org/abs/cond-mat/0606427v1

Physics

Condensed Matter

Materials Science

9 pages, 3 figures, to be published in Applied Physics Letters

Scientific paper

10.1063/1.2266414

Time-resolved photoluminescence (PL) and micro-PL imaging were used to study single CdS nanowires at 10 K. The low-temperature PL of all CdS nanowires exhibit spectral features near energies associated with free and bound exciton transitions, with the transition energies and emission intensities varying along the length of the nanowire. In addition, several nanowires show spatially localized PL at lower energies which are associated with morphological irregularities in the nanowires. Time-resolved PL measurements indicate that exciton recombination in all CdS nanowires is dominated by non-radiative recombination at the surface of the nanowires.

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