Controlling the Molecular Orientation of a Novel Diketopyrrolopyrrole-Based Organic Conjugated Polymer for Enhancing the Performance of Organic Field-Effect Transistors

Desu, Moulika; Sharma, Shubham; Cheng, Kuang-Hao; Wang, Yuhan; Nagamatsu, Shuichi; Chen, Jyh‐Chien; Pandey, Shyam S.

doi:10.2139/ssrn.4214105

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“…Similarly, Tsuyoshi et al also optimized the performance of devices by adjusting the molecular weight of a DPP and thiophene based polymer [ 26 ]. Recently, large-area oriented films based on DPP-type polymers prepared via the ribbon-shaped floating film transfer (FTM) technique have also been reported, fully demonstrating the importance of DPP as a moiety [ 27 ]. The molecular structure of the donor–acceptor type is illustrated in Figure 1 .…”

Section: Introductionmentioning

confidence: 99%

Organic Transistors Based on Highly Crystalline Donor–Acceptor π-Conjugated Polymer of Pentathiophene and Diketopyrrolopyrrole

Ren,

Wang,

Chen

et al. 2024

Molecules

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Oligomers and polymers consisting of multiple thiophenes are widely used in organic electronics such as organic transistors and sensors because of their strong electron-donating ability. In this study, a solution to the problem of the poor solubility of polythiophene systems was developed. A novel π-conjugated polymer material, PDPP-5Th, was synthesized by adding the electron acceptor unit, DPP, to the polythiophene system with a long alkyl side chain, which facilitated the solution processing of the material for the preparation of devices. Meanwhile, the presence of the multicarbonyl groups within the DPP molecule facilitated donor–acceptor interactions in the internal chain, which further improved the hole-transport properties of the polythiophene-based material. The weak forces present within the molecules that promoted structural coplanarity were analyzed using theoretical simulations. Furthermore, the grazing incidence wide-angle X-ray scanning (GIWAXS) results indicated that PDPP-5Th features high crystallinity, which is favorable for efficient carrier migration within and between polymer chains. The material showed hole transport properties as high as 0.44 cm2 V−1 s−1 in conductivity testing. Our investigations demonstrate the great potential of this polymer material in the field of optoelectronics.

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Section: Introductionmentioning

confidence: 99%