From Chlorinated Solvents to Branched Polyethylene: Solvent-Induced Phase Separation for the Greener Processing of Semiconducting Polymers,Advanced Electronic Materials

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From Chlorinated Solvents to Branched Polyethylene: Solvent-Induced Phase Separation for the Greener Processing of Semiconducting Polymers
Advanced Electronic Materials ( IF 5.3 ) Pub Date : 2021-10-15 , DOI: 10.1002/aelm.202100928
Yunyun Wu ₁ , Michael U. Ocheje ₁ , Sara S. Mechael ₁ , Yunfei Wang ₂ , Eric Landry ₃ , Xiaodan Gu ₂ , Peng Xiang ₃ , Tricia Breen Carmichael ₁ , Simon Rondeau‐Gagné ₁

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Despite having favorable optoelectronic and thermomechanical properties, the wide application of semiconducting polymers still suffers from limitations, particularly with regards to their processing in solution which necessitates toxic chlorinated solvents due to their intrinsic low solubility in common organic solvents. This work presents a novel greener approach to the fabrication of organic electronics without the use of toxic chlorinated solvents. Low-molecular-weight non-toxic branched polyethylene (BPE) is used as a solvent to process diketopyrrolopyrrole-based semiconducting polymers, then the solvent-induced phase separation (SIPS) technique is adopted to produce films of semiconducting polymers from solution for the fabrication of organic field-effect transistors (OFETs). The films of semiconducting polymers prepared from BPE using SIPS show a more porous granular morphology with preferential edge-on crystalline orientation compared to the semiconducting polymer film processed from chloroform. OFETs based on the semiconducting films processed from BPE show similar device characteristics to those prepared from chloroform without thermal annealing, confirming the efficiency and suitability of BPE to replace traditional chlorinated solvents for green organic electronics. This new greener processing approach for semiconducting polymers is potentially compatible with different printing techniques and is particularly promising for the preparation of porous semiconducting layers and the fabrication of OFET-based electronics.

中文翻译：

从氯化溶剂到支化聚乙烯：用于半导体聚合物更绿色加工的溶剂诱导相分离

尽管具有良好的光电和热机械性能，但半导体聚合物的广泛应用仍然受到限制，特别是在它们在溶液中的加工方面，由于它们在普通有机溶剂中的固有低溶解度，因此需要有毒的氯化溶剂。这项工作提出了一种在不使用有毒氯化溶剂的情况下制造有机电子产品的新型绿色方法。以低分子量无毒支化聚乙烯（BPE）为溶剂，加工二酮吡咯并吡咯基半导体聚合物，然后采用溶剂诱导相分离（SIPS）技术从溶液中制备半导体聚合物薄膜，用于制备有机场效应晶体管 (OFET)。与由氯仿加工的半导体聚合物薄膜相比，使用 SIPS 由 BPE 制备的半导体聚合物薄膜显示出更多的多孔颗粒形态，具有优先的边缘结晶取向。基于 BPE 加工的半导体薄膜的 OFET 显示出与未经热退火的氯仿制备的器件相似的器件特性，证实了 BPE 替代传统氯化溶剂用于绿色有机电子产品的效率和适用性。这种用于半导体聚合物的新绿色加工方法可能与不同的印刷技术兼容，并且对于制备多孔半导体层和制造基于 OFET 的电子器件特别有前景。

更新日期：2021-10-15

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