White organic light-emitting diodes based on a combined electromer and monomer emission in doubly-doped polymers

• 来源期刊: 中国物理B（英文版）
• 关键词: white organic light-emitting diodes electromer emission monomer emission Commission Internationale de L'Eclairage (CIE)
• 年，卷（期）: 2012,（8）
• 页码范围: 580-583
• 页数: 4页
• 语种: 英文
• DOI: 10.1088/1674-1056/21/8/088504

摘要

We report on white organic light-emitting diodes (WOLEDs) based on polyvinylcarbazole (PVK) doped with 1,1-bis((di-4-tolylamino)phenyl)cyclohexane (TAPC) and perylene,and investigate the luminescence mechanism of the devices.The chromaticity of light emission can be tuned by adjusting the concentration of the dopants.White light with the Commission Internationale de L'Eclairage (CIE) coordinates of (0.33,0.34) is achieved by mixing the yellow electromer emission of TAPC and the blue monomer emission of perylene from the device ITO/PVK:TAPC:perylene (100∶9∶1 in wt.) (100 nm)/tris-(8-hydroxyquinoline aluminum (Alq3) (10 nm)/Al.The device exhibits a maximal luminance of 3727 cd/m2 and a current efficiency of 2 cd/A.