Ternary complex [Sm(acac)3(5-Br-2,2′-bpy)] for the solution-processed white polymer light-emitting diode (WPLED)

In consideration of the Sm3+-centered characteristic orange-light as the ideal color-primary component toward a dichromatic white-light, herein, through the doping of the complex [Sm(acac)3(5-Br-2,2′-bpy)] (2; Hacac = acetylacetone; 5-Br-2,2′-bpy = 5-Br-2,2′-bipyridine) into the PVK (PVK = poly(N-vinyl-carbazole)) host, the obtained PVK@2 film (10:1, wt/wt) exhibits the straightforward solid-state white-light (ΦPL = 6.7%). Further using the PVK@2 film (10:1; wt/wt) as the emitting layer, its single-component solution-processed WPLED gives the electroluminescent performance (LMax of 360.9 cd/m2, ηcMax of 1.08 cd/A) satisfactory enough for portable full-color flat displays. Using the doping-typed PVK@2 film (10:1, wt/wt) with the straightforward solid-state white-light (ΦPL = 6.7%) as the emitting layer, its single-component solution-processed WPLED gives the electroluminescent performance (LMax of 360.9 cd/m2, ηcMax of 1.08 cd/A) satisfactory enough for portable full-color flat displays. [Display omitted] •Complex [Sm(acac)3(5-Br-2,2′-bpy)] (2) with efficient Sm3+-centered orange-light is obtained.•The doping-typed PVK@2 films show the color-tunable character.•The single-component WPLED based on the PVK@2 film is realized.