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. 2020 Mar 9;10:4344. doi: 10.1038/s41598-020-61282-x

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© The Author(s) 2020

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/.

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Polarized optical microscopic images of TIPS pentacene/P3HT blend films with different P3HT weight ratios: (a) at 2%, elongated TIPS pentacene crystals were formed along a uniform direction with enhanced long-range order; (b) at 10%, crystal gaps were enlarged with more misorientation; (c) at 25%, TIPS pentacene film exhibited a combination of both crystal needles and curved microwires; and (d) at 50%, grass-like, curved microwires dominated the film morphology. “S” and “D” in (a) indicates the “source” and “drain” gold contact electrodes. All optical microscopic images share the same scale bar of 100 μm as in (a).