论文摘要
Polymer thin film with uniform thickness and flat surface profile is the key point for polymer light emitting diodes（PLEDs） by inkjet printing. However, the coffee ring effect is usually observed due to the mismatch between the evaporation of the solvent and the decrease of solution volume, which promotes the formation of radial flow from the interior of the drop to the edge. In this paper, coffee ring effects of inkjet printed poly（spirobifluorene） films were proposed to be restrained by decreasing capillary force by adding co-solvent with high boiling point and high viscosity to the main solvent. The low evaporation rate of the co-solvent can reduce the driving force of the radial flow; meanwhile the high viscosity of the co-solvent can increase the resistance of the radial flow. Thus, polymer films with improve uniformity can be obtained due to the suppression of the radial flow. The device performance was greatly improved under the condition of proper film thickness and film uniformity and the maximum luminous efficiency of devices with inkjet printed poly（spirobifluorene） can reach 80% of the spin-coated devices.
论文目录
文章来源
类型: 期刊论文
作者: Xinhong Yu,Rubo Xing,Zhongxiang Peng,Yangming Lin,Zhonghui Du,Junqiao Ding,Lixiang Wang,Yanchun Han
来源: Chinese Chemical Letters 2019年01期
年度: 2019
分类: 工程科技Ⅰ辑,工程科技Ⅱ辑
专业: 化学,材料科学,工业通用技术及设备
单位: State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences
基金: financially supported by the National Natural Science Foundation of China (Nos. 21574130,51473161,51873212),the Ministry of Science and Technology of China (No. 2015CB655001),National Key R&D Program of “Strategic Advanced Electronic Materials” (Nos. 2016YFB0401301,2016YFB04011001)
分类号: O631;TB383.2
页码: 135-138
总页数: 4
文件大小: 2898K
下载量: 15
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