Effect of Processing Parameters on Performance of Spray-Deposited Organic Thin-Film Transistors
Effect of Processing Parameters on Performance of Spray-Deposited Organic Thin-Film Transistors
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DOI：
10.1155/2011/914510
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发表时间：
2011-05
影响因子：
4.2
通讯作者：
Jack W. Owen;N. Azarova;M. Loth;M. Paradinas;M. Coll;C. Ocal;J. Anthony;O. Jurchescu
中科院分区：
文献类型：
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作者：
Jack W. Owen;N. Azarova;M. Loth;M. Paradinas;M. Coll;C. Ocal;J. Anthony;O. Jurchescu
有机薄膜晶体管（OTFT）的性能通常强烈依赖于制造过程。在本研究中，我们利用喷雾沉积法制作可溶性小分子有机半导体薄膜电晶体，并探讨制程参数对薄膜形貌与元件移动性的影响。特别是，我们报告的溶剂的性质，在沉积中使用的载气的压力，和喷涂距离的影响。我们使用扫描力显微镜研究了表面形态，并显示分子沿沿着π堆叠方向堆积，这是优选的电荷传输方向。我们的研究结果表明，我们可以通过控制制造参数，将喷射沉积器件的场效应迁移率调整两个数量级，从10−3 cm 2/Vs到10−1 cm 2/Vs。
The performance of organic thin-film transistors (OTFTs) is often strongly dependent on the fabrication procedure. In this study, we fabricate OTFTs of soluble small-molecule organic semiconductors by spray-deposition and explore the effect of processing parameters on film morphology and device mobility. In particular, we report on the effect of the nature of solvent, the pressure of the carrier gas used in deposition, and the spraying distance. We investigate the surface morphology using scanning force microscopy and show that the molecules pack along the π-stacking direction, which is the preferred charge transport direction. Our results demonstrate that we can tune the field-effect mobility of spray-deposited devices two orders of magnitude, from 10−3 cm2/Vs to 10−1 cm2/Vs, by controlling fabrication parameters.