以有机硅氧烷为支链的环保溶剂加工dpp基共轭聚合物:合成、性能和双极性场效应晶体管特性

IF 4.7 3区 材料科学 Q1 ENGINEERING, ELECTRICAL & ELECTRONIC
Shengzhen Liu, Zijin You, Ti Wu*, Yuguang Feng, Jin Cao, Lanlan Hou and Zhaohui Yu*, 
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引用次数: 0

摘要

侧链在聚合物半导体分子设计中的作用受到了广泛的关注,因为它对材料加工、薄膜质量和有机光电器件的性能有着深远的影响。随着现代有机光电技术的发展和工业生产的需求,材料和器件的绿色加工方法受到越来越多的关注。本文设计并合成了以二酮吡咯(DPP)和硒酚为基的三种共轭聚合物半导体,其侧链具有双聚硅氧烷端基的特征。相应的聚合物T1-PDPPSi-Se和T3-PDPPSi-Se分别在侧链的C2和C4处具有支链位点。双聚硅氧烷端侧链的合理设计使共聚物不仅具有较高的分子量,而且具有优异的溶解度,特别是在“绿色”溶剂中。采用低毒性非氯化溶剂(甲苯和己烷)制备了聚合物半导体薄膜,并制备了具有双极性输运行为的有机场效应晶体管(ofet)。未经处理的T1-PDPPSi-Se、T31-PDPPSi-Se(中分子量)和T32-PDPPSi-Se(高分子量)聚合物的器件空穴/电子迁移率分别为2.34 × 10-2/0.38 × 10-3、2.65 × 10-2/1.6 × 10-3和4.07 × 10-2/4.7 × 10-3cm2V-1s-1。此外,非氯化试剂铸造薄膜与氯仿铸造薄膜具有相同数量级的迁移率值,这对于更环保的器件加工非常重要。用GIWAXS探测三种材料的薄膜,发现它们的片层方向是随机的,而不是π -π方向。这就解释了其迁移率低于线性硅氧烷改性聚合物的原因。这些结果可为杂化侧链修饰半导体共轭聚合物的分子设计提供参考。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Toward Eco-Friendly Solvent-Processable DPP-Based Conjugated Polymers with Siloxane Branched Side Chains: Synthesis, Properties, and Ambipolar Field-Effect Transistor Characteristics

Toward Eco-Friendly Solvent-Processable DPP-Based Conjugated Polymers with Siloxane Branched Side Chains: Synthesis, Properties, and Ambipolar Field-Effect Transistor Characteristics

The role of side chains in molecular design for polymer semiconductors has received widespread attention, as it has a profound impact on material processing, film quality, and performance of organic optoelectronic devices. With the development of modern organic optoelectronic technology and the demand for industrial production, green processing methods for materials and devices have attracted more attention. Herein, three conjugated polymer semiconductors based on diketopyrrolopyrrole (DPP) and selenophen were designed and synthesized with side chains exhibiting characteristics of double polysiloxane-terminated groups. The corresponding polymers T1-PDPPSi-Se and T3-PDPPSi-Se have branched chain sites at C2 and C4 in the side chains, respectively. The proper design of the double polysiloxane-terminated side chain enabled the copolymers not only to have higher molecular weights but also to exhibit excellent solubility, especially in “green” solvents. Polymer semiconductor films were prepared using low-toxicity non-chlorinated solvents (toluene and hexane), and their organic field-effect transistors (OFETs) were fabricated, exhibiting ambipolar transport behavior. The devices based on polymers T1-PDPPSi-Se, T31-PDPPSi-Se (medium molecular weight), and T32-PDPPSi-Se (high molecular weight) without being processed had the maximum hole/electron mobilities of 2.34 × 10–2/0.38 × 10–3, 2.65 × 10–2/1.6 × 10–3, and 4.07 × 10–2/4.7 × 10–3cm2V–1s–1, respectively. Moreover, non-chlorinated reagent-cast films had the same orders of magnitude mobility values as chloroform-cast films, which were important for greener device processing. Thin films of three materials probed by GIWAXS reveal a random lamellar direction and not the π–π direction. This penetrates the reason why its mobility is lower than that of linear siloxane-modified polymers. These results may be used for reference in the molecular design of hybrid side chain-modified semiconducting conjugated polymers.

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来源期刊
CiteScore
7.20
自引率
4.30%
发文量
567
期刊介绍: ACS Applied Electronic Materials is an interdisciplinary journal publishing original research covering all aspects of electronic materials. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials science, engineering, optics, physics, and chemistry into important applications of electronic materials. Sample research topics that span the journal's scope are inorganic, organic, ionic and polymeric materials with properties that include conducting, semiconducting, superconducting, insulating, dielectric, magnetic, optoelectronic, piezoelectric, ferroelectric and thermoelectric. Indexed/​Abstracted: Web of Science SCIE Scopus CAS INSPEC Portico
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