Morphology of inkjet printed 6,13 bis(tri-isopropylsilylethynyl) pentacene on surface-treated silica

作者：Wang, Xiang Hua^*; Xiong, Xian Feng; Qiu, Long Zhen; Lv, Guo Qiang

来源：JOURNAL OF VACUUM SCIENCE & TECHNOLOGY B, 2012, 30(2): 021206.

DOI：10.1116/1.3693415

• Concentration gradients
• Crystallization behavior
• Morphology control
• Ortho-dichlorobenzene
• Pinning interaction
• Small-molecule organic semiconductor
• Solute concentrations
• Thin film morphology

The soluble small molecule organic semiconductor, 6,13 bis(tri-isopropylsilylethynyl) pentacene, is inkjet printed on thermally grown silicon dioxide via an orthodichlorobenzene solvent. This paper studies the effect of surface treatment on the size and geometry of sessile drops, as well as the film growth and crystallization behavior on the substrate. The mechanism of morphology control of inkjet-printed arrayed isolating dots or thin film involves the interaction at the interface between the solute molecules and solid substrate. The size and geometry of microscale isolating dots depend on the substrate's surface uniformity, while the thin film morphology is less affected by this uniformity. Crystallization of the semiconductor requires a relatively high solute concentration at the contact line and is usually accompanied by solute diffusion driven under a concentration gradient. The polar contribution of the surface energy enhances pinning interaction between the substrate and solute molecules and favors the formation of a continuous film.

• 出版日期2012-3
• 单位合肥工业大学