Energy transfer effect of hybrid organic rubrene nanorod with CdSe/ZnS quantum dots: Application to optical waveguiding modulators
- Authors
- Moon, Woo Sung; Cho, Eun Hei; Lee, Ju Bok; Jeon, Sumin; Kim, Jeongyong; Lee, Kwang-Sup; Joo, Jinsoo
- Issue Date
- 12월-2014
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Rubrene; Nanorod; Quantum dots; Energy transfer; Optical waveguiding
- Citation
- SYNTHETIC METALS, v.198, pp.285 - 292
- Indexed
- SCIE
SCOPUS
- Journal Title
- SYNTHETIC METALS
- Volume
- 198
- Start Page
- 285
- End Page
- 292
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/96679
- DOI
- 10.1016/j.synthmet.2014.10.030
- ISSN
- 0379-6779
- Abstract
- 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 Forster 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. (C) 2014 Elsevier B.V. All rights reserved.
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