Key Laboratory for Organic Electronics and Information Displays (KLOEID) & Institute of Advanced Materials (IAM), Jiangsu National Synergetic Innovation Center for Advanced Materials (SICAM), Nanjing University of Posts & Telecommunications , 9 Wenyuan Road, Nanjing 210023, China.
Shaanxi Institute of Flexible Electronics (SIFE), Northwestern Polytechnical University (NPU) , 127 West Youyi Road, Xi'an, Shaanxi 710072, China.
ACS Appl Mater Interfaces. 2017 Nov 22;9(46):40533-40540. doi: 10.1021/acsami.7b13355. Epub 2017 Nov 8.
Manufacturing small-molecule organic light-emitting diodes (OLEDs) via inkjet printing is rather attractive for realizing high-efficiency and long-life-span devices, yet it is challenging. In this paper, we present our efforts on systematical investigation and optimization of the ink properties and the printing process to enable facile inkjet printing of conjugated light-emitting small molecules. Various factors on influencing the inkjet-printed film quality during the droplet generation, the ink spreading on the substrates, and its solidification processes have been systematically investigated and optimized. Consequently, halogen-free inks have been developed and large-area patterning inkjet printing on flexible substrates with efficient blue emission has been successfully demonstrated. Moreover, OLEDs manufactured by inkjet printing the light-emitting small molecules manifested superior performance as compared with their corresponding spin-cast counterparts.
通过喷墨打印制造小分子有机发光二极管（OLED）对于实现高效率和长寿命器件非常有吸引力，但这具有挑战性。在本文中，我们致力于系统地研究和优化墨水特性和打印工艺，以实现共轭发光小分子的简便喷墨打印。在液滴生成、墨水在基底上的扩展及其固化过程中，各种影响喷墨打印薄膜质量的因素已被系统地研究和优化。因此，已经开发出无卤墨水，并成功地在柔性基底上进行了大面积的图案化喷墨打印，实现了高效的蓝色发射。此外，通过喷墨打印发光小分子制造的 OLED 表现出优于其相应旋涂对应物的性能。
