TY - JOUR
T1 - Intrachain Charge Transport through Conjugated Donor-Acceptor Oligomers
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.
N1 - Publisher Copyright:
Copyright © 2018 American Chemical Society.
PY - 2019/1/22
Y1 - 2019/1/22
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
KW - organic semiconductors
KW - scanning tunneling microscope break-junction (STM-BJ)
KW - single molecule
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U2 - 10.1021/acsaelm.8b00050
DO - 10.1021/acsaelm.8b00050
M3 - Article
AN - SCOPUS:85100504922
SN - 2637-6113
VL - 1
SP - 7
EP - 12
JO - ACS Applied Electronic Materials
JF - ACS Applied Electronic Materials
IS - 1
ER -