A diphenyl ether bridged, high triplet energy host material for blue phosphorescent organic light-emitting diodes

作者：Oh Chan Seok; Lee Chil Won; Lee Jun Yeob^*

来源：Dyes and Pigments, 2013, 98(3): 372-376.

DOI：10.1016/j.dyepig.2013.03.005

• Diphenylether linkage
• High triplet energy
• High glass transition temperature
• Blue device
• High quantum efficiency
• Carbazole triplet host

A carbazole type, thermally stable, high triplet energy host material having a diphenylether linkage, 9,9%26apos;-(oxybis([1,1%26apos;-biphenyl]-4%26apos;,3-diyl))bis(9H-carbazole), was synthesized and the device performances of blue phosphorescent organic light-emitting diodes were studied. The new host material exhibited a high glass transition temperature of 111 degrees C and a high triplet energy of 2.73 eV for energy transfer to blue triplet emitter. Blue devices were fabricated using the new host material and a high quantum efficiency of 23.5% was achieved.

• 出版日期2013-9