Direct Writing and Aligning of Small-Molecule Organic Semiconductor Crystals via “Dragging Mode” Electrohydrodynamic Jet Printing for Flexible Organic Field-Effect Transistor Arrays,The Journal of Physical Chemistry Letters

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Direct Writing and Aligning of Small-Molecule Organic Semiconductor Crystals via “Dragging Mode” Electrohydrodynamic Jet Printing for Flexible Organic Field-Effect Transistor Arrays
The Journal of Physical Chemistry Letters ( IF 4.8 ) Pub Date : 2017-10-31 00:00:00 , DOI: 10.1021/acs.jpclett.7b02590
Kyunghun Kim ₁ , Jaehyun Bae ₂ , Sung Hoon Noh ₃ , Jaeyoung Jang ₃ , Se Hyun Kim ₂ , Chan Eon Park ₁

Affiliation

Patterning and aligning of organic small-molecule semiconductor crystals over large areas is an important issue for their commercialization and practical device applications. This Letter reports “dragging mode” electrohydrodynamic jet printing that can simultaneously achieve direct writing and aligning of 6,13-bis(triisopropylsilylethynyl) pentacene (TIPS-PEN) crystals. Dragging mode provides favorable conditions for crystal growth with efficient controls over supply voltages and nozzle-to-substrate distances. Optimal printing speed produces millimeter-long TIPS-PEN crystals with unidirectional alignment along the printing direction. These crystals are highly crystalline with a uniform packing structure that favors lateral charge transport. Organic field-effect transistors (OFETs) based on the optimally printed TIPS-PEN crystals exhibit high field-effect mobilities up to 1.65 cm²/(V·s). We also demonstrate the feasibility of controlling pattern shapes of the crystals as well as the fabrication of printed flexible OFET arrays.

中文翻译：

通过“拖动模式”电液动力喷射印刷技术对柔性有机场效应晶体管阵列进行小分子有机半导体晶体的直接写入和对准

有机小分子半导体晶体在大面积上的图案化和取向是其商业化和实际设备应用的重要问题。这封信报道了“拖动模式”电动流体动力喷射印刷，它可以同时实现6,13-双（三异丙基甲硅烷基乙炔基）并五苯（TIPS-PEN）晶体的直接书写和对准。拖曳模式通过有效控制电源电压和喷嘴到基板的距离，为晶体生长提供了有利条件。最佳的打印速度可以产生毫米毫米长的TIPS-PEN晶体，并沿打印方向单向排列。这些晶体是高度结晶的，具有均匀的堆积结构，有利于横向电荷传输。² /（V·s）。我们还证明了控制晶体图案形状以及印刷柔性OFET阵列的制造的可行性。

更新日期：2017-10-31

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