Department of Chemical Engineering, University of Rochester , Rochester, New York 14627, United States.
ACS Appl Mater Interfaces. 2016 Jul 6;8(26):16809-15. doi: 10.1021/acsami.6b05286. Epub 2016 Jun 24.
In this study, we report a contact printing technique that uses polyurethane-acrylate (PUA) polymers as the printing stamps to pattern electroluminescent layers of organic light emitting diodes (OLEDs). We demonstrate that electroluminescent thin films can be printed with high uniformity and resolution. We also show that the performance of the printed devices can be improved via postprinting thermal annealing, and that the external quantum efficiency of the printed devices is comparable with the efficiency of the vacuum-deposited OLEDs. Our results suggest that the PUA-based contact printing can be used as an alternative to the traditional shadow mask deposition, permitting manufacturing of OLED displays with the resolution up to the diffraction limit of visible-light emission.
在这项研究中，我们报告了一种接触印刷技术，该技术使用聚氨酯丙烯酸酯（PUA）聚合物作为印刷模板来对有机发光二极管（OLED）的电致发光层进行图案化。我们证明了可以使用高均匀性和高分辨率对电致发光薄膜进行印刷。我们还表明，通过后印刷热退火可以改善印刷器件的性能，并且印刷器件的外量子效率可与真空沉积 OLED 的效率相媲美。我们的结果表明，基于 PUA 的接触印刷可以替代传统的掩模沉积，从而可以制造出分辨率高达可见光发射的衍射极限的 OLED 显示器。
