Intrachain Charge Transport through Conjugated Donor-Acceptor Oligomers

Bo Li; Hao Yu; Elena C. Montoto; Yun Liu; Songsong Li; Kenneth Schwieter; Joaquín Rodriguez-Lopez; Jeffrey S. Moore; Charles M. Schroeder

doi:10.1021/acsaelm.8b00050

Intrachain Charge Transport through Conjugated Donor-Acceptor Oligomers

Bo Li, Hao Yu, Elena C. Montoto, Yun Liu, Songsong Li, Kenneth Schwieter, Joaquín Rodriguez-Lopez, Jeffrey S. Moore, Charles M. Schroeder^*

^*Corresponding author for this work

Department of Physics

Research output: Contribution to journal › Journal article › peer-review

23 Citations (Scopus)

Abstract

Donor-acceptor (D-A) polymers are promising materials for organic electronics because of high charge carrier mobilities and narrow band gaps. Despite recent progress, there is incomplete understanding of the mechanisms underlying charge transport in these materials. In this work, we use single molecule techniques to study intrachain charge transport in D-A oligomers containing alternating diketopyrrolopyrrole (DPP) acceptor and bithiophene donor units. Interestingly, at high applied bias, longer DPPTT oligomers exhibit substantially higher conductance compared to shorter oligomers, which is interpreted using density functional theory (DFT) simulations. Overall, this work provides an increased understanding of intrachain charge transport along D-A oligomers.

Original language	English
Pages (from-to)	7-12
Number of pages	6
Journal	ACS Applied Electronic Materials
Volume	1
Issue number	1
Early online date	24 Dec 2018
DOIs	https://doi.org/10.1021/acsaelm.8b00050
Publication status	Published - 22 Jan 2019

User-Defined Keywords

donor-acceptor oligomers
intrachain charge transport
organic semiconductors
scanning tunneling microscope break-junction (STM-BJ)
single molecule

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10.1021/acsaelm.8b00050

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title = "Intrachain Charge Transport through Conjugated Donor-Acceptor Oligomers",

abstract = "Donor-acceptor (D-A) polymers are promising materials for organic electronics because of high charge carrier mobilities and narrow band gaps. Despite recent progress, there is incomplete understanding of the mechanisms underlying charge transport in these materials. In this work, we use single molecule techniques to study intrachain charge transport in D-A oligomers containing alternating diketopyrrolopyrrole (DPP) acceptor and bithiophene donor units. Interestingly, at high applied bias, longer DPPTT oligomers exhibit substantially higher conductance compared to shorter oligomers, which is interpreted using density functional theory (DFT) simulations. Overall, this work provides an increased understanding of intrachain charge transport along D-A oligomers.",

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AU - Li, Bo

AU - Yu, Hao

AU - Montoto, Elena C.

AU - Liu, Yun

AU - Li, Songsong

AU - Schwieter, Kenneth

AU - Rodriguez-Lopez, Joaquín

AU - Moore, Jeffrey S.

AU - Schroeder, Charles M.

PY - 2019/1/22

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N2 - Donor-acceptor (D-A) polymers are promising materials for organic electronics because of high charge carrier mobilities and narrow band gaps. Despite recent progress, there is incomplete understanding of the mechanisms underlying charge transport in these materials. In this work, we use single molecule techniques to study intrachain charge transport in D-A oligomers containing alternating diketopyrrolopyrrole (DPP) acceptor and bithiophene donor units. Interestingly, at high applied bias, longer DPPTT oligomers exhibit substantially higher conductance compared to shorter oligomers, which is interpreted using density functional theory (DFT) simulations. Overall, this work provides an increased understanding of intrachain charge transport along D-A oligomers.

AB - Donor-acceptor (D-A) polymers are promising materials for organic electronics because of high charge carrier mobilities and narrow band gaps. Despite recent progress, there is incomplete understanding of the mechanisms underlying charge transport in these materials. In this work, we use single molecule techniques to study intrachain charge transport in D-A oligomers containing alternating diketopyrrolopyrrole (DPP) acceptor and bithiophene donor units. Interestingly, at high applied bias, longer DPPTT oligomers exhibit substantially higher conductance compared to shorter oligomers, which is interpreted using density functional theory (DFT) simulations. Overall, this work provides an increased understanding of intrachain charge transport along D-A oligomers.

KW - donor-acceptor oligomers

KW - intrachain charge transport

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KW - scanning tunneling microscope break-junction (STM-BJ)

KW - single molecule

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Intrachain Charge Transport through Conjugated Donor-Acceptor Oligomers

Abstract

User-Defined Keywords

UN SDGs

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