ma0c01559_si_001.pdf (1.58 MB)
Establishment of the Interconnectivity among P(NDI2OD-T2)s in Organic Field-Effect Transistors by Non-Conjugated Crystalline Polymers
journal contribution
posted on 2020-10-23, 03:16 authored by Hau-Ren Yang, Chun-Wei Pai, Han-Sheng Sun, Cuo Wu, Yu-Ying Lai, Shu-Chih Haw, Jey-Jau Lee, Jin-Ming ChenIn
this work, P(NDI2OD-T2) was blended with various amounts of
PEO, aPP, or iPP to furnish numerous
thin films. The morphology of pristine P(NDI2OD-T2) and the blends
was investigated by X-ray photoelectron spectroscopy, grazing-incidence
X-ray scattering (GIXS), near-edge X-ray absorption fine structure
spectroscopy, UV–vis spectroscopy, and atomic force microscopy,
revealing that the aggregation of P(NDI2OD-T2) is adjustable, and
the interconnected P(NDI2OD-T2) domain can be readily achieved. Furthermore,
the transformation of P(NDI2OD-T2) from face-on to edge-on crystallites
was observed at a specific blend. A rationale by adopting the geometric
shape of crystallite is proposed to account for this transformation.
P(NDI2OD-T2) and the blends were submitted to organic field-effect
transistor fabrication in the bottom-gate/top-contact geometry. The
relationship between the electron mobility and the GIXS morphological
characteristics is established. According to the fitting equation,
the π stacking and polymer backbone of P(NDI2OD-T2) play significant
roles in determining the electron mobility.