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나노 구조 물리 연구단
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Effect of Hot-Electron Injection on the Excited-State Dynamics of a Hybrid Plasmonic System Containing Poly(3-hexylthiophene)-Coated Gold Nanoparticles

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Title
Effect of Hot-Electron Injection on the Excited-State Dynamics of a Hybrid Plasmonic System Containing Poly(3-hexylthiophene)-Coated Gold Nanoparticles
Author(s)
Dongki Lee; Sung Hyuk Kim; Se Kyo Han; Jungho Mun; Junsuk Rho; Kilwon Cho; Hanju Rhee; Mun Seok Jeong; Dongyeop X. Oh
Publication Date
2019-10
Journal
JOURNAL OF PHYSICAL CHEMISTRY C, v.123, no.43, pp.26564 - 26570
Publisher
AMER CHEMICAL SOC
Abstract
Copyright © 2019 American Chemical Society.We investigated the photophysical interaction between a conjugated polymer (CP) and a plasmonic gold nanoparticle (Au NP) using transient absorption spectroscopy. We prepared a hybrid system containing CP-stabilized Au NPs by reducing a Au precursor directly with a thiol-terminated poly(3-hexylthiophene) surfactant (P3HT-SH), with the unreacted P3HT-SH chains used as an organic matrix. The P3HT attached to the Au NPs plays two critical roles in our hybrid system: it suppresses exciton quenching from the P3HT matrix to Au NPs (the spacer role) and relays hot electrons induced by surface plasmon resonance of Au NPs to P3HT (the bridge role). Thus, singlet excitons are more slowly relaxed in our hybrid system than those in a neat P3HT film. Our findings may provide important information for development of the high-efficiency hybrid optoelectronic devices
URI
https://pr.ibs.re.kr/handle/8788114/6575
ISSN
1932-7447
Appears in Collections:
Center for Integrated Nanostructure Physics(나노구조물리 연구단) > Journal Papers (저널논문)
Files in This Item:
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