| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1440748 | Synthetic Metals | 2014 | 8 Pages |
•Fabrication of organic rubrene nanorods (NRs) hybridized with blue and green emitting quantum dots (QDs).•Enhanced PL intensity of the rubrene NR portion after attaching the QDs due to FRET effect.•More efficient optical waveguiding characteristics from the hybrid rubrene NR/blue-QDs than from the pristine NR.
Organic rubrene (5,6,11,12-tetraphenyltetracene) nanorods (NRs) were fabricated through the physical vapor transport method for the study of active fluorescence optical waveguiding and its modulation. The functionalized CdSe/ZnS quantum dots (QDs) with blue and green emissions were partially attached to the surface of the rubrene NR. Using a high resolution laser confocal microscope (LCM), the nanoscale photoluminescence (PL) intensity of the pristine rubrene portion of the hybrid NR/QDs was observed to be considerably enhanced after it was attached with blue (or green) QDs. The nanoscale optical waveguiding characteristics of the hybrid NR/QDs were investigated in terms of the output LCM PL spectra as a function of propagation distance. We observed more efficient optical waveguiding characteristics from the hybrid rubrene NR/blue-QDs than from the pristine NR and the hybrid rubrene NR/green-QDs. These results can be analyzed in terms of the higher Förster resonance energy transfer efficiency for hybrid rubrene NR/blue-QDs system. The results and analysis were supported by a drastic decrease of exciton lifetime of QDs in the hybrid region as measured by time-resolved PL decay curves.
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