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Tailoring the Crystallinity of Solution-Processed 6,13-bis(triisopropylsilylethynyl)pentacene via Controlled Solidification

Tailoring the Crystallinity of Solution-Processed 6,13-bis(triisopropylsilylethynyl)pentacene via Controlled Solidification

Hye Su Kim, Jun Hwa Park, Wi Hyoung Lee, Hyun Ho Kim, Yeong Don Park

Soft Matter. 2019 Sep 25;15(37):7369-7373.

PMID: 31468035

Abstract:

Solution processing is one of the most important techniques for producing large-area, uniform films for printed electronics via a low-cost process. Herein, we propose a time-controlled spin-coating method to improve the crystallinity of films of the solution-processable organic small-molecule semiconductor 6,13-bis(triisopropylsilylethynyl)pentacene (TIPS-pentacene). A key factor in this process was to halt spinning before drying had begun. We used microscopic and spectroscopic analyses to systematically investigate the effect of spinning time on the evaporation rate of solvent at different spinning rates. We found that the crystallinity of the TIPS-pentacene thin films was substantially enhanced when the spinning time was limited to a few seconds, without post-treatment. We fabricated field-effect transistors using thin films deposited by this method and found that the field-effect mobility was enhanced ∼100-fold compared with that of a device fabricated using a film deposited by the conventional spin-coating method.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
AP373596088	6,13-Bis(triisopropylsilylethynyl)pentacene		373596-08-8	Price

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