Exploring coherent transport through π-stacked systems for molecular electronic devices

Qian Li; Gemma Solomon

doi:10.1039/c4fd00083h

Exploring coherent transport through π-stacked systems for molecular electronic devices

Qian Li, Gemma Solomon

Kemisk Institut

6 Citationer (Scopus)

807 Downloads (Pure)

Abstract

Understanding electron transport across π-stacked systems can help to elucidate the role of intermolecular tunneling in molecular junctions and potentially with the design of high-efficiency molecular devices. Here we show how conjugation length and substituent groups influence the electron transport and thermoelectric response in the π-stacked structures by investigating five representative stacked molecular junctions. We found that a π-stacked system of two substituted anthracenes exhibits good thermopower and a high power factor, suggesting that increased conjugation can enhance the thermoelectric response. The fully eclipsed structure of quinhydrone exhibits a high power factor at the minimum energy structure and could thus be a better candidate in a thermoelectric device compared with the other π-stacked systems considered.

Originalsprog	Engelsk
Tidsskrift	Faraday Discussions
Vol/bind	174
Sider (fra-til)	21-35
Antal sider	15
ISSN	1359-6640
DOI	https://doi.org/10.1039/c4fd00083h
Status	Udgivet - 8 sep. 2014

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10.1039/c4fd00083h

Exploring coherent transport through pstacked systems for molecular electronic devicesForlagets udgivne version, 9,75 MB

Citationsformater

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N2 - Understanding electron transport across π-stacked systems can help to elucidate the role of intermolecular tunneling in molecular junctions and potentially with the design of high-efficiency molecular devices. Here we show how conjugation length and substituent groups influence the electron transport and thermoelectric response in the π-stacked structures by investigating five representative stacked molecular junctions. We found that a π-stacked system of two substituted anthracenes exhibits good thermopower and a high power factor, suggesting that increased conjugation can enhance the thermoelectric response. The fully eclipsed structure of quinhydrone exhibits a high power factor at the minimum energy structure and could thus be a better candidate in a thermoelectric device compared with the other π-stacked systems considered.

AB - Understanding electron transport across π-stacked systems can help to elucidate the role of intermolecular tunneling in molecular junctions and potentially with the design of high-efficiency molecular devices. Here we show how conjugation length and substituent groups influence the electron transport and thermoelectric response in the π-stacked structures by investigating five representative stacked molecular junctions. We found that a π-stacked system of two substituted anthracenes exhibits good thermopower and a high power factor, suggesting that increased conjugation can enhance the thermoelectric response. The fully eclipsed structure of quinhydrone exhibits a high power factor at the minimum energy structure and could thus be a better candidate in a thermoelectric device compared with the other π-stacked systems considered.

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ER -

Exploring coherent transport through π-stacked systems for molecular electronic devices

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