Inkjet printing technology is considered to be a next generation manufacturing method for organic light-emitting diodes (OLEDs) production because of its simplicity and low cost. However, the dissolution at interfaces in the printing process is still one of the great challenges that limits its progress. The present work utilized the dissolution phenomenon innovatively to generate blurred interface during inkjet printing of multi-layer OLEDs, where TAPC and TAPC:TPBi:Ir-complexes were employed as a hole transport layer (HTL) and emitting layer (EML) and both of them were dissolvable in butyl benzoate to form the HTL and EML inks. When they were printed sequentially, a blurred interface between HTL and EML was formed because of the dissolution phenomenon, which facilitated the exciton formation and charge balance in EML and improved the device performance. With this blurred interface, the maximum current efficiency of 9.8 cd A −1 , the maximum power efficiency of 5.0 lm W...

中文翻译：

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基于模糊界面的喷墨印刷多层OLED

喷墨打印技术由于其简单性和低成本而被认为是用于有机发光二极管（OLED）生产的下一代制造方法。然而，在印刷过程中界面处的溶解仍然是限制其进展的重大挑战之一。本工作创新地利用了溶解现象，在多层OLED的喷墨打印过程中产生了模糊的界面，其中TAPC和TAPC：TPBi：Ir复合物被用作空穴传输层（HTL）和发射层（EML），并且两者它们可溶于苯甲酸丁酯中，形成HTL和EML油墨。依次打印时，由于溶解现象，HTL和EML之间形成了模糊的界面，这有助于在EML中激子形成和电荷平衡，并改善了器件性能。有了这个模糊的接口，最大电流效率为9.8 cd A -1，最大功率效率为5.0 lm W ...