Line printing solution-processable small molecules with uniform surface profile via ink-jet printer
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- 作者：Huimin Liu ; Wei Xu ; Wanyi Tan ; Xuhui Zhu ; Jian Wang ; jianwang@scut.edu.cn" class="auth_mail" title="E-mail the corresponding author ; Junbiao Peng ; psjbpeng@scut.edu.cn" class="auth_mail" title="E-mail the corresponding author ; Yong Cao
- 关键词：Ink-jet printing ; Small molecular ; Solution process ; Coffee ring ; Surface tension
- 刊名：Journal of Colloid and Interface Science
- 出版年：2016
- 出版时间：1 March 2016
- 年：2016
- 卷：465
- 期：Complete
- 页码：106-111
- 全文大小：1065 K
文摘
Line printing offers a feasible approach to remove the pixel well structure which is widely used to confine the ink-jet printed solution. In the study, a uniform line is printed by an ink-jet printer. To achieve a uniform surface profile of the printed line, 10 vol% low-volatile solvent DMA (3,4-Dimethylanisole) is mixed with high-volatile solvent Pxy (p-xylene) as the solvent. After a solution-processable small molecule is dissolved, the surface tension of DMA solution becomes lower than that of Pxy solution, which creates an inward Marangoni flow during the solvent evaporation. The inward Marangoni flow balances out the outward capillary flow, thereby forming a flat film surface. The line width of the printed line depends on the contact angle of the solution on the hole injection layer.