Novel bipolar host for highly efficient green, yellow, orange, red and deep-red phosphorescent organic light-emitting devices

• 来源期刊: 中国科学:化学（英文版）
• 年，卷（期）: 2017,（4）
• 页码范围: 504-509
• 页数: 6页
• 语种: 英文
• DOI: 10.1007/s11426-017-9021-x

摘要

A novel bipolar host tris(4-(pyrimidin-5-yl)phenyl)amine (TPMTPA) constructed by incorporating triphenylamine as the electron-donating core and pyrimidine as the electron-accepting peripheries was designed and synthesized.TPMTPA achieves excellent bipolar charge transport properties and has high enough triplet energy level to sensitize green,yellow,orange,red and deep-red phosphors.By using TPMTPA as a host,high performance green,yellow,orange,red and deep-red phosphorescent organic light-emitting devices (PhOLEDs) were demonstrated with maximum external quantum efficiencies of 20.4％,17.6％,15.1％,15.3％ and 15.7％ respectively.These results suggested that TPMTPA is a versatile high performance host for PhOLEDs of different emission colors.