Efficient multilayer electrophosphorescence white polymer light-emitting diodes with aluminum cathodes

✍ Scribed by Tengling Ye; Minrong Zhu; Jiangshan Chen; Dongge Ma; Chuluo Yang; Wenfa Xie; Shiyong Liu

• Publisher: Elsevier Science
• Year: 2011
• Tongue: English
• Weight: 969 KB
• Volume: 12
• Category: Article
• ISSN: 1566-1199
• DOI: 10.1016/j.orgel.2010.10.025

✦ Synopsis

By simply doping Li 2 CO 3 in an alcohol soluble neutral conjugated polymer poly[9,9-bis(6 0diethoxylphosphorylhexyl)fluorene] (PF-EP), we demonstrate highly efficient multilayer electrophosphorescence white polymer light-emitting diodes with air-stable Al cathode. From the mechanism studies, we find that the phosphate groups can make Li ions movable in the PF-EP film, resulting in great improvement in the electron injection and transport ability of PF-EP. The hole-blocking ability is also strengthened.