A Solution‐Processed Resonance Host for Highly Efficient Electrophosphorescent Devices with Extremely Low Efficiency Roll‐off. (30th September 2015)

• Record Type: Journal Article
• Authors: Tao, Ye; Guo, Xin; Hao, Lin; Chen, Runfeng; Li, Huanhuan; Chen, Yuehua; Zhang, Xinwen; Lai, Wenyong; Huang, Wei
• Is Part Of: Advanced materials. Volume 27:Number 43(2015)
• Page Start: 6939
• Page End: 6944
• Publication Date: 2015-09-30
• Subjects: dynamic adaptation -- efficiency roll‐off -- phosphorescent light‐emitting diodes (PHOLEDs) -- resonance hosts -- solution processing; Materials -- Periodicals; Chemical vapor deposition -- Periodicals; 620.11
• DOI: 10.1002/adma.201503108
• Languages: English
• ISSNs: 0935-9648

Abstract

Abstract : Solution‐processible N–P=O resonance‐host molecules are applied successfully in spin‐coated phosphorescent light‐emitting diodes (PHOLEDs) to selectively and self‐adaptively tune the electrical properties for balanced charge transportation. The resonance‐molecule‐hosted PHOLEDs exhibit a high maximum quantum efficiency of 16.5% and a low efficiency roll‐off down to 0.7%, highlighting the significant progress of these solution‐processed PHOLEDs with high efficiency and flat efficiency roll‐off achieved simultaneously.