Substituted Diindenopyrazinediones with symmetrical Polyalkyl-carbazole for high-efficiency blueish green solution-processable OLED. (July 2017)

• Record Type: Journal Article
• Authors: Zhang, Lei; Bai, Yongqi; Liu, Zhiyang; Jiang, Weigang; Lei, Tao; Yang, Rongjuan; Islam, Amjad; Zhang, Yumei; Ouyang, Xinhua; Ge, Ziyi
• Is Part Of: Dyes and pigments. Volume 142(2017)
• Page Start: 544
• Page End: 551
• Publication Date: 2017-07
• Subjects: Peripheral substituted -- Solution-processable OLEDs -- Deep blue emitting -- Low turn-on voltage -- Low efficiency roll-off; Dyes and dyeing -- Periodicals; Pigments -- Periodicals; 667.2
• DOI: 10.1016/j.dyepig.2017.04.003
• Languages: English
• ISSNs: 0143-7208

Abstract

Abstract: Much effort has been devoted to design and synthesize this solution-processable OLEDs, Some significant advances have been achieved with the power efficiencies. However, most of them still lag behind those of evaporated non-doping OLEDs. Two novel peripheral Polyalkyl-carbazole substituted Diindeno-pyrazinediones have been developed for highly-efficient and solution-processable OLEDs. Provide high efficient materials for the solution-processed to reduce costs of OLEDs. By fine-tuning their carriers transfer and injection barriers, solution-processed device based on DTPADIPY-TCz shows highly efficient bluish green emission with a maximum power efficiency (PE) of 6.88 lm W −1, which is among the highest reported to date for solution-processable fluorescent OLEDs with a relatively low efficiency roll-off. Graphical abstract: Highlights: We have designed and synthesized two kinds of solution-processable Substituted Diindenopyrazinediones with improved carrier transport. Solution-processed device shows PEmax and CEmax of 2.20 l m W −1 and 2.49 cd A −1 . By fine-tuning their carries transfer and injection barriers, DTPADIPY-TCz shows a relatively low efficiency roll-off.