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양자나노과학 연구단
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Donor−Acceptor Distance-Dependent Charge Transfer Dynamics Controlled by Metamaterial Structures

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Title
Donor−Acceptor Distance-Dependent Charge Transfer Dynamics Controlled by Metamaterial Structures
Author(s)
Kwang Jin Lee; Yiming Xiao; Eun Sun Kim; Fabrice Mathevet; Loic Mager; Olivier Cregut; Frédéric Fages; Jean-Charles Ribierre; Jeong Weon Wu; Anthony D’Aléo
Publication Date
2019-11
Journal
ACS PHOTONICS, v.6, no.11, pp.2649 - 2654
Publisher
AMER CHEMICAL SOC
Abstract
The capability to control charge transfer dynamics in a donor−acceptor molecule is important for efficient optoelectronic devices. Charge transfer dynamics is governed by thermodynamics of donor−acceptor charges in a given dielectric environment. Metamaterial structure has been shown to be able to control charge separation and charge recombination processes via nonlocal effect on dielectric permittivity for a fixed donor− acceptor distance organic film. Here, we report the influence of the metamaterial structure on the donor−acceptor distance dependence of the electron transfer process occurring in liquid crystalline organic semiconductor thin films. By examining the charge recombination rate in three different donor−acceptor distances, it is found that the barrier height β increases from 0.084 to 0.137 Å−1 by 63% in the presence of metal-dielectric multilayered metamaterial structures. Based on the Marcus theory on the charge transfer process, we show that a further increase in the driving force for a larger donor−acceptor distance is mainly responsible for the barrier height increase in the presence of a multilayered metamaterial substrate when compared with a glass substrate. This study will provide a significant step forward in enabling more efficient hybrid organic-optoelectronic devices associated with the charge transfer process. © 2019 American Chemical Society
URI
https://pr.ibs.re.kr/handle/8788114/6782
ISSN
2330-4022
Appears in Collections:
Center for Quantum Nanoscience(양자나노과학 연구단) > Journal Papers (저널 논문)
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Anthonly D Aloe_Donor−Acceptor Distance-Dependent Charge Transfer Dynamics Controlled by Metamaterial Structures_acsphotonics.9b01177.pdfDownload

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