TY - JOUR
T1 - Electron transport in soft-crystalline thin films of perylene diimide substituted with swallow-tail terminal alkyl chains
AU - Ślęczkowski, Piotr
AU - Xiao, Yiming
AU - Wu, Jeong Weon
AU - Adachi, Chihaya
AU - Sosa Vargas, Lydia
AU - Kreher, David
AU - Heinrich, Benoît
AU - Ribierre, Jean-Charles
AU - Mathevet, Fabrice
N1 - Funding: The work has been carried out in the framework of the French- Korean International Laboratory “CNRS-EWHA Research Center for Ultrafast Optics and Nanoelectronics of Functional Nanostructures”. P.S. would like to thank the National Science Centre, Poland (UMO-2021/43/D/ST5/02786). J.-C.R. thanks the Engineering and Physical Sciences Research Council of the UK for the financial support from grant EP/ Y021495/1. C.A. and F.M. thank the French National Centre for Scientific Research (CNRS, International Research Project LUX-ERIT) and the Japan Society for the Promotion of Science (JSPS, grant numbers: 23H05406 and 23K20039).
PY - 2024/12/12
Y1 - 2024/12/12
N2 - We have examined the structural and electron transport properties of a swallow-tailed N,N’-bis(1-heptyloctyl)-perylene-3,4:9,10-bis(dicarboximide) (PDI-C8,7) in thin films. A comprehensive analysis of material with the use of X-ray scattering methods evidenced the appearance of a new soft-crystalline mesophase that was induced by thermal processing of the swallow-tail PDI derivative. By combining electrical measurements with grazing-incidence wide-angle X-ray scattering (GIWAXS), we show that these morphological changes of thin films boost their charge transport in the organic field-effect transistor (OFET) configuration. The systematic device engineering of OFETs, including device architecture, thermal history, and preparation method of the active layer, resulted in a significant improvement in the electron field-effect mobility and the related performance parameters. In particular, the results demonstrate a strong improvement in the charge transport of PDI-C8,7 films in their soft-crystalline phase, which originates from the N-substitution by swallow-tails. In addition, our study demonstrates that the melt-processing route, a solvent-free and vacuum-free method for the fabrication of organic thin films, represents an efficient strategy for the fabrication of high-performance air-stable n-type OFETs.
AB - We have examined the structural and electron transport properties of a swallow-tailed N,N’-bis(1-heptyloctyl)-perylene-3,4:9,10-bis(dicarboximide) (PDI-C8,7) in thin films. A comprehensive analysis of material with the use of X-ray scattering methods evidenced the appearance of a new soft-crystalline mesophase that was induced by thermal processing of the swallow-tail PDI derivative. By combining electrical measurements with grazing-incidence wide-angle X-ray scattering (GIWAXS), we show that these morphological changes of thin films boost their charge transport in the organic field-effect transistor (OFET) configuration. The systematic device engineering of OFETs, including device architecture, thermal history, and preparation method of the active layer, resulted in a significant improvement in the electron field-effect mobility and the related performance parameters. In particular, the results demonstrate a strong improvement in the charge transport of PDI-C8,7 films in their soft-crystalline phase, which originates from the N-substitution by swallow-tails. In addition, our study demonstrates that the melt-processing route, a solvent-free and vacuum-free method for the fabrication of organic thin films, represents an efficient strategy for the fabrication of high-performance air-stable n-type OFETs.
U2 - 10.1021/acs.jpcc.4c06222
DO - 10.1021/acs.jpcc.4c06222
M3 - Article
SN - 1932-7447
VL - ASAP
JO - Journal of Physical Chemistry C
JF - Journal of Physical Chemistry C
ER -