Optimized coaxial focused electrohydrodynamic jet printing of highly ordered semiconductor sub-microwire arrays for high-performance organic field-effect transistors

Liangkun Lu; Dazhi Wang; Zhiyuan Zhao; Yikang Li; Changchang Pu; Pengfei Xu; Xiangji Chen; Chang Liu; Shiwen Liang; Liujia Suo; Junsheng Liang; Yan Cui; Yunlong Guo; Yunqi Liu

doi:10.1039/d2nr06469c

Optimized coaxial focused electrohydrodynamic jet printing of highly ordered semiconductor sub-microwire arrays for high-performance organic field-effect transistors

Nanoscale. 2023 Jan 27;15(4):1880-1889. doi: 10.1039/d2nr06469c.

Authors

Liangkun Lu¹, Dazhi Wang^{1

2

3}, Zhiyuan Zhao⁴, Yikang Li¹, Changchang Pu¹, Pengfei Xu¹, Xiangji Chen¹, Chang Liu¹, Shiwen Liang³, Liujia Suo¹, Junsheng Liang¹, Yan Cui¹, Yunlong Guo⁴, Yunqi Liu⁴

Affiliations

¹ Laboratory for Micro/Nano Technology and System of Liaoning Province, Dalian University of Technology, Dalian, 116024, China. d.wang@dlut.edu.cn.
² Key Laboratory for Precision and Non-traditional Machining Technology of Ministry of Education, Dalian University of Technology, Dalian, 116024, China.
³ Ningbo Institute of Dalian University of Technology, Ningbo, 315000, China.
⁴ Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China.

PMID: 36606492
DOI: 10.1039/d2nr06469c

Abstract

Patterning of semiconductor polymers is pertinent to preparing and applying organic field-effect transistors (OFETs). In this study, coaxial focused electrohydrodynamic jet printing (high resolution, high speed, and convenient) was used to pattern polymer semiconductors. The influence of the key printing parameters on the width of polymer sub-microwires was evaluated. The width decreased with increasing applied voltage, printing speed, and concentration of the polymer ink. However, the width increased gradually with increasing polymer ink flow rate. A regression analysis model of the relationship between the printing parameters and width was established. Based on a regression analysis/genetic algorithm, the optimal printing parameters were obtained and the correctness of the printing parameters was verified. The optimized printing parameters stabilized the width of the arrays to ca. 110 nm and imparted a smooth morphology. Additionally, the corresponding OFETs exhibited a high mobility of 2 cm² V^-1 s^-1, which is 5× higher than that of thin-film-based OFETs. One can conveniently obtain high-performance OFETs from ordered sub-microwire arrays fabricated by CFEJ printing.