Luminescence enhancement by surface plasmon assisted Forster resonance energy transfer in quantum dots and light emitting polymer hybrids with Au nanoparticles

被引：19

作者：

Lee, Yong-baek ^{[1
]}

Lee, Seok Ho ^{[1
]}

Park, Sung-yeoun ^{[2
]}

Park, Cheol-joon ^{[1
]}

Lee, Kwang-Sup ^{[2
]}

Kim, Jeongyong ^{[3
,4
]}

Joo, Jinsoo ^{[1
]}

机构：

[1] Korea Univ, Dept Phys, Seoul 136713, South Korea

[2] Hannam Univ, Dept Adv Mat, Taejon 305811, South Korea

[3] Sungkyunkwan Univ, Dept Energy Sci, Suwon 440746, South Korea

[4] Inst for Basic Sci Korea, Ctr Integrated Nanostruct Phys, Taejon 305701, South Korea

来源：

SYNTHETIC METALS | 2014年 / 187卷

基金：

新加坡国家研究基金会;

关键词：

Poly(3-hexylthiophene); Nanowire; Au nanoparticle; CdSe/ZnS quantum dot; Surface plasmon; Forster resonance energy transfer; SIZE; POLY(3-HEXYLTHIOPHENE); ELECTROLUMINESCENCE; NANOCRYSTALS; DEPENDENCE; SEPARATION; DIODES;

D O I：

10.1016/j.synthmet.2013.11.005

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

引用

页码：130 / 135

页数：6

共 39 条

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