Luminescence enhancement by surface plasmon assisted Forster resonance energy transfer in quantum dots and light emitting polymer hybrids with Au nanoparticles
- Authors
- Lee, Yong-baek; Lee, Seok Ho; Park, Sung-yeoun; Park, Cheol-joon; Lee, Kwang-Sup; Kim, Jeongyong; Joo, Jinsoo
- Issue Date
- 1월-2014
- Publisher
- ELSEVIER SCIENCE SA
- Keywords
- Poly(3-hexylthiophene); Nanowire; Au nanoparticle; CdSe/ZnS quantum dot; Surface plasmon; Forster resonance energy transfer
- Citation
- SYNTHETIC METALS, v.187, pp.130 - 135
- Indexed
- SCIE
SCOPUS
- Journal Title
- SYNTHETIC METALS
- Volume
- 187
- Start Page
- 130
- End Page
- 135
- URI
- https://scholar.korea.ac.kr/handle/2021.sw.korea/99739
- DOI
- 10.1016/j.synthmet.2013.11.005
- ISSN
- 0379-6779
- Abstract
- Hybrid nanowires (NWs) of light-emitting poly(3-hexylthiophene) (P3HT) blended with gold nanoparticles (Au-NPs) were fabricated by a wetting method. The functionalized CdSe/ZnS quantum dots (QDs) were attached to the surfaces of P3HT/Au-NP5 NWs. The nanoscale photoluminescence (PL) characteristics of the P3HT, P3HT/Au-NPs, and QDs/P3HT/Au-NPs single NWs were investigated using a high resolution laser confocal microscope (LCM). For a P3HT/Au-NP5 single NW, the LCM PL intensity of the P3HT NW decreased due to the luminescence quenching effect by the blending with Au-NPs. However, the LCM PL intensity of the P3HT/Au-NPs NW drastically increased when the QDs were attached to the surface of the NW. The PL enhancement of the P3HT NW part in the hybrid QDs/P3HT/Au-NPs single NW originated from the Forster resonance energy transfer (FRET) effect between the QDs and the P3HT NW, which was assisted by the surface plasmon (SP) coupling of Au-NPs with the QDs. Based on the analysis of time-resolved PL spectra, the exciton lifetimes of the QDs for the QDs/P3HT/Au-NPs NW were found to decrease considerably in comparison with those of the QDs/P3HT NWs without Au-NPs. We also found that the energy transfer rate of the QDs/P3HT NW increased from 0.76 to 0.93 with the Au-NPs. These observations support the notion of SP assisted FRET effect in hybrid nanosystems. (C) 2013 Elsevier B.V. All rights reserved.
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