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[Prof. Kimoon Kim] Solution-Processable, Crystalline π-Conjugated Two-Dimensional Polymers with High Charge Carrier Mobility

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작성자 최고관리자 댓글 조회 작성일 20-09-11 16:45

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Solution-Processable, Crystalline π-Conjugated Two-Dimensional Polymers with High Charge Carrier Mobility

Samik Jhulki, Jeehong Kim, In-Chul Hwang, Golam Haider, Jiyong Park, Ji Young Park, Yeonsang Lee, Wooseup Hwang, Ajaz Ahmed Dar, Barun Dhara, Sang Hoon Lee, Juho Kim, Jin Young Koo, Moon Ho Jo, Chan-Cuk Hwang, Young Hwa Jung, Youngsin Park, Monika Kataria, Yang-Fang Chen, Seung-Hoon Jhi,* Mu-Hyun Baik,* Kangkyun Baek* & Kimoon Kim*

  Poor solubility of π-conjugated two-dimensional polymers (C2Ps) has been a significant roadblock in incorporating these emergent materials into electronic devices by simple solution processing. Here, we report a rational design of triphenylene-based building blocks that condense via a series of reversible reactions for self-error-correction and a final irreversible fixation to form a pyrazine motif, which leads to the formation of crystalline C2Ps in solution without any aid of template or preorganization. Unlike typical covalent organic frameworks, remarkably, these materials remain dispersed as single- to few layer films in solution, presumably due to protonation of pyrazine motifs by the strong acid employed in the synthesis. The C2Ps can be easily drop-cast onto solid surfaces for characterization and fabrication of electronic devices. The thin polymer films display a long-range internal order and exhibit high hole mobility up to 4 cm2V-1s-1, the highest among C2Ps, which paves the way to design high performance optoelectronic devices.   https://www.cell.com/chem/fulltext/S2451-9294(20)30249-7

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