In this section
@article{Stewart:2024:10.1002/adma.202211184,
author = {Stewart, K and Pagano, K and Tan, E and Daboczi, M and Rimmele, M and Luke, J and Eslava, S and Kim, J-S},
doi = {10.1002/adma.202211184},
journal = {Advanced Materials},
title = {Understanding effects of alkyl side-chain density on polaron formation via electrochemical doping in thiophene polymers},
url = {http://dx.doi.org/10.1002/adma.202211184},
volume = {36},
year = {2024}
}
TY - JOUR
AB - Polarons exist when charges are injected into organic semiconductors due to their strong coupling with the lattice phonons, significantly affecting electronic charge-transport properties. Understanding the formation and (de)localization of polarons is therefore critical for further developing organic semiconductors as a future electronics platform. However, there are very few studies reported in this area. In particular, there is no direct in situ monitoring of polaron formation and identification of its dependence on molecular structure and impact on electrical properties, limiting further advancement in organic electronics. Herein, how a minor modification of side-chain density in thiophene-based conjugated polymers affects the polaron formation via electrochemical doping, changing the polymers’ electrical response to the surrounding dielectric environment for gas sensing, is demonstrated. It is found that the reduction in side-chain density results in a multistep polaron formation, leading to an initial formation of localized polarons in thiophene units without side chains. Reduced side-chain density also allows the formation of a high density of polarons with fewer polymer structural changes. More numerous but more localized polarons generate a stronger analyte response but without the selectivity between polar and non-polar solvents, which is different from the more delocalized polarons that show clear selectivity. The results provide important molecular understanding and design rules for the polaron formation and its impact on electrical properties.
AU - Stewart,K
AU - Pagano,K
AU - Tan,E
AU - Daboczi,M
AU - Rimmele,M
AU - Luke,J
AU - Eslava,S
AU - Kim,J-S
DO - 10.1002/adma.202211184
PY - 2024///
SN - 0935-9648
TI - Understanding effects of alkyl side-chain density on polaron formation via electrochemical doping in thiophene polymers
T2 - Advanced Materials
UR - http://dx.doi.org/10.1002/adma.202211184
UR - https://www.webofscience.com/api/gateway?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:001067837600001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=a2bf6146997ec60c407a63945d4e92bb
UR - https://onlinelibrary.wiley.com/doi/10.1002/adma.202211184
UR - http://hdl.handle.net/10044/1/112632
VL - 36
ER -