Arylfluorene based universal hosts for solution-processed RGB and white phosphorescent organic light-emitting devices. Issue 114 (3rd November 2015)

• Record Type: Journal Article
• Authors: Zhang, Xinwen; Yang, Tao; Wei, Qi; Chen, Yuehua; Guo, Xin; Xie, Linghai; Lai, Wenyong; Fan, Quli; Qian, Yan; Huang, Wei
• Is Part Of: RSC advances. Volume 5:Issue 114(2015)
• Page Start: 94077
• Page End: 94083
• Publication Date: 2015-11-03
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c5ra19231e
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : A series of easily synthesized arylfluorenes (AFs)/carbazole universal host materials have been demonstrated for efficient solution-processable phosphorescent OLEDs. Abstract : A series of solution-processible arylfluorenes (AFs)/carbazole hybrid compounds (SmeFCz, DMeFCz, SMeOFCz, DMeOFCz, SFFCz andDFFCz ) have been designed and synthesized via a simple one-step reaction. These compounds exhibit good thermal stability, excellent solubility and high triplet energy levels, which can be used as universal hosts for solution-processed phosphorescent organic light-emitting devices (PhOLEDs). Employing the developed materials, highly efficient blue (DMeFCz : CEmax : 20.0 cd A −1, EQEmax : 10.0%), green (DMeFCz : CEmax : 26.0 cd A −1, EQEmax : 7.8%) and red (SMeFCz : CEmax : 13.7 cd A −1, EQEmax : 8.2%) PhOLEDs fabricated by spin-coating in different device configurations have been demonstrated. Furthermore, complementary-color, single-emitting layer white phosphorescent device were also obtained. TheSMeOFCz -based white device exhibited highly efficient white-light emission with a maximum efficiency of 27.1 cd A −1 (EQE of 12.0%). The state-of-art performance indicates that AFs/carbazole hybrid hosts have a favorable prospect for applications in solution-processed full-color displays and white PhOLEDs.