期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 465, 期 -, 页码 106-111出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2015.11.067
关键词
Ink-jet printing; Small molecular; Solution process; Coffee ring; Surface tension
资金
- Ministry of Science and Technology (973 Program) [2015CB655000]
- National Nature Science Foundation of China [61079116, 51373057, U1301243]
- Project of Guangdong Province and the Ministry of Education [2012B091000114]
- Integration of Production and Research Projects of Guangdong Province [2013B090500015]
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. (C) 2015 Elsevier Inc. All rights reserved.
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