Controlling aggregation and crystallization of solution processed diketopyrrolopyrrole based polymer for high performance thin film transistors by pre-metered slot die coating process

Chang, Jingjing, Sonar, Prashant, Lin, Zhenhua, Zhang, Chunfu, Zhang, Jie, Hao, Yue, & Wu, Jishan (2016) Controlling aggregation and crystallization of solution processed diketopyrrolopyrrole based polymer for high performance thin film transistors by pre-metered slot die coating process. Organic Electronics, 36, pp. 113-119.

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Abstract

The organic semiconductors have attracted much attention for plastic electronics due to their good solution processability, low temperature deposition, and compatible with large-area printing technology. The charge transport properties of polymer based field effect transistors are limited by their amorphous domains and weakly interaction between polymer chains. In this study, antisolvent like methanol is introduced to promote polymer chain aggregation, and slot die coating is used to finely tune the film morphology. The effects of anti-solvent introduction and slot die coating process on the device performance, e.g. charge transport, surface morphology, and solid state packing, were investigated in details. By optimizing the antisolvent ratio and polymer chain aggregation, the charge transport properties of the polymer devices were observed to be significantly improved. An average charge carrier mobility of 3.76 cm2 V−1 s−1 and a maximum mobility of 4.10 cm2 V−1 s−1 were achieved under optimized conditions. The controlling the aggregation degree by combining the mixed solvent system and slot die coating technique provides a convenient and practical approach to achieve high performance polymer field effect transistor.

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ID Code: 99791
Item Type: Journal Article
Refereed: Yes
Keywords: Thin film transistors; PDPPF-DTT; Slot die coating; Aggregation; Antisolvent
DOI: 10.1016/j.orgel.2016.06.003
ISSN: 1566-1199
Divisions: Current > Schools > School of Chemistry, Physics & Mechanical Engineering
Current > QUT Faculties and Divisions > Science & Engineering Faculty
Copyright Owner: Copyright 2016 Elsevier B.V.
Deposited On: 10 Oct 2016 22:58
Last Modified: 25 Oct 2016 04:49

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