View : 763 Download: 0
Donor-Acceptor Distance-Dependent Charge Transfer Dynamics Controlled by Metamaterial Structures
- Title
- Donor-Acceptor Distance-Dependent Charge Transfer Dynamics Controlled by Metamaterial Structures
- Authors
- Lee, Kwang Jin; Xiao, Yiming; Kim, Eun Sun; Mathevet, Fabrice; Mager, Loic; Cregut, Olivier; Fages, Frederic; Ribierre, Jean-Charles; Wu, Jeong Weon; D'Aleo, Anthony
- Ewha Authors
- 우정원
- SCOPUS Author ID
- 우정원
- Issue Date
- 2019
- Journal Title
- ACS PHOTONICS
- ISSN
- 2330-4022
- Citation
- ACS PHOTONICS vol. 6, no. 11, pp. 2649 - 2654
- Keywords
- organic semiconductors; metamaterials; charge transfer dynamics; nonlocal effect; Marcus theory
- Publisher
- AMER CHEMICAL SOC
- Indexed
- SCIE; SCOPUS
- Document Type
- Article
- 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 beta increases from 0.084 to 0.137 angstrom(-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.
- DOI
- 10.1021/acsphotonics.9b01177
- Appears in Collections:
- 자연과학대학 > 물리학전공 > Journal papers
- Files in This Item:
There are no files associated with this item.
- Export
- RIS (EndNote)
- XLS (Excel)
- XML