Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1516957 | Journal of Physics and Chemistry of Solids | 2011 | 4 Pages |
White polymer light-emitting diodes (WPLEDs) were fabricated with blue phosphorescent iridium bis(2-(4,6-difluorophenyl)-pyridinato-N,C2′) picolinate (FIrpic) and red fluorescent silole and carbazole copolymer PCz-MPTST within a poly(N-vinylcarbazole) (PVK): 1,3-bis[(4-tert-butylphenyl)-1,3,4- oxadiazolyl] phenylene (OXD-7) host matrix. Efficient white emission consisting two emission peaks was achieved with luminous efficiency of 9.2 cd/A and CIE coordinates of (0.37, 0.40). By means of transient photoluminescence response, energy transfer among the blending components was investigated and discussed.
► WPLEDs were fabricated with blue phosphorescent FIrpic and a novel red fluorescent copolymer. ► Efficient white emission with luminous efficiency of 9.2 cd/A and CIE coordinates of (0.37, 0.40). ► Addition of PCz-MPTST induces additional charge trapping effect and energy transfer.