A bipolar host based high triplet energy electroplex for an over 10 000 h lifetime in pure blue phosphorescent organic light-emitting diodes. Issue 2 (30th October 2019)

• Record Type: Journal Article
• Authors: Jung, Mina; Lee, Kyung Hyung; Lee, Jun Yeob; Kim, Taekyung
• Is Part Of: Materials horizons. Volume 7:Issue 2(2020)
• Page Start: 559
• Page End: 565
• Publication Date: 2019-10-30
• Subjects: Materials -- Research -- Periodicals; 543.0284
• DOI: 10.1039/c9mh01268k
• Languages: English
• ISSNs: 2051-6347

Abstract

Abstract : Ultimate device performances of blue phosphorescent organic light-emitting diodes, an external quantum efficiency of 27.6%, a device lifetime over 10 000 h at 100 cd m −2, and CIE (0.12, 0.13), were achieved by employing an electroplex host. Abstract : Ultimate device performances of blue phosphorescent organic light-emitting diodes, an external quantum efficiency of 27.6%, a device lifetime over 10 000 h at 100 cd m −2, and pure blue color coordinates of (0.12, 0.13), were simultaneously achieved using a device architecture employing an electroplex host. A high triplet energy electron transport type host derived from a triazine core, a carbazole substituent, and a triphenylsilyl blocking unit was newly synthesized for the purpose of developing the high emission energy electroplex host. The electroplex host functioned as a carrier balancing host for high external quantum efficiency and a lifetime extending host of pure blue phosphorescent organic light-emitting diodes. This work demonstrates ultimate device performances, high external quantum efficiency and long lifetime, in pure blue phosphorescent organic light-emitting diodes. In particular, the lifetime limit of pure blue phosphorescent organic light-emitting diodes was overcome by demonstrating an over 10 000 h lifetime.