光子学报, 2019, 48 (6): 0616001, 网络出版: 2019-07-10   

喷墨打印量子点薄膜的形貌控制

Morphology Controlling of Quantum Dots Thin Films Prepared by Inkjet Printing
作者单位
福州大学 物理与信息工程学院, 福州 350100
摘要
基于微流体理论, 对采用聚合物量子点墨水打印薄膜的干燥过程进行了研究, 并通过优化溶剂配比、聚合物含量及干燥温度克服“咖啡环”现象, 改善薄膜形貌.研究结果表明: 墨水中添加高沸点溶剂有助于延缓外向流动; 调节聚合物含量可改变墨水的物理性质, 有利于在诱发内向流动的同时阻碍外向流动, 二者均可明显改善“咖啡环”形貌, 另外聚合物的流平作用可提高薄膜的平整度; 调节干燥温度可优化液滴与基板的接触线钉扎, 从而进一步改善“咖啡环”形貌.最终, 在量子点浓度为12 mg/mL, 墨水中氯苯/环己基苯体积比为8∶2, 聚丙烯酸酯质量百分比为11 wt%, 干燥温度为25 ℃时制备了直径约为169 μm, 高度约为65 nm的均匀量子点薄膜及量子点点阵, 为QLED器件的制备及Micro-LED面板的全彩化提供了技术支持.
Abstract
Based on the microfluidic theory, the drying process of film printed with polyacrylate-QD inks was studied. Besides, the coffee ring effect was overcome by optimizing solvent ratio, polymer content and drying temperature to improve the morphology of the array films. The results showed that the addition of high boiling point solvent is helpful to delay the outward flow of droplets on the substrate. Adjusting polymer content can change the physical properties of the inks, which is beneficial to induce inward flow and hinder outward flow. In addition, the polymer can ameliorate the smoothness of the films because of the leveling effect. Both of them can significantly improve the morphology of coffee ring. Moreover, adjusting drying temperature can optimize the pinning of contact line between droplet and substrate, thus further improving the morphology of coffee ring. Finally, the uniform quantum dot films and quantum dot arrays with diameters of 169 μm and heights of 65 nm were prepared at the quantum dot concentration of 12 mg/mL, the volume ratio of chlorobenzene/cyclohexyl benzene in ink is 8∶2, the mass percentage of polyacrylate is 11wt%, and the drying temperature is 25 ℃, which provides basic technical support for the fabrication of QLED devices and the full-color of Micro-LED panels.

雷霄霄, 叶芸, 林楠, 陈恩果, 郭太良. 喷墨打印量子点薄膜的形貌控制[J]. 光子学报, 2019, 48(6): 0616001. LEI Xiao-xiao, YE Yun, LIN Nan, CHEN En-guo, GUO Tai-liang. Morphology Controlling of Quantum Dots Thin Films Prepared by Inkjet Printing[J]. ACTA PHOTONICA SINICA, 2019, 48(6): 0616001.

本文已被 2 篇论文引用
被引统计数据来源于中国光学期刊网
引用该论文: TXT   |   EndNote

相关论文

加载中...

关于本站 Cookie 的使用提示

中国光学期刊网使用基于 cookie 的技术来更好地为您提供各项服务,点击此处了解我们的隐私策略。 如您需继续使用本网站,请您授权我们使用本地 cookie 来保存部分信息。
全站搜索
您最值得信赖的光电行业旗舰网络服务平台!