Control of QD film morphology by tuning evaporation dynamics in vacuum condition
발표자
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초록
내용
In the process of drying functional inks to form final films, for example in the manufacture of ink jet panels, control of the drying process is essential. However, drying of ink droplets under uncontrolled conditions can cause problems such as formation of films of poor quality, such as pinholes and coffee ring stain. In this study, vacuum evaporation is proposed as a method to control the film morphology without damaging the QD particles during the drying process. The results of investigating the effect of vacuum changes on the drying behavior and film formation of CdSe QD ink show that vacuum drying not only reduces the drying time but also changes the movement of the contact line of the ink droplets. The changes in the contact line and drying dynamics allow for the control of the final morphology of the QD film as a function of pressure. These results suggest that vacuum drying can be applied to various solutions for forming a final film through droplet drying.