Deep-blue emitting poly(2′,3′,6′,7′-tetraoctyl-2,7-spirosilabifluorene) simultaneously with good color purity and high external quantum efficiency

The introduced spiro-linkage into the silicon-containing polymer has been demonstrated to effectively prevent the unwanted aggregation, leading to deep-blue electroluminescence with CIE coordinates of (0.16, 0.06).168