Spiro-Functionalized Polyfluorene Derivatives as Blue Light-Emitting Materials

Novel spiro-functionalized polyfluorene derivatives (see Figure) are synthesized here. The absorbance and photoluminescence properties of these compounds are investigated and pure blue electroluminescence is demonstrated in single-layered and double-layered devices. Spiro-functionalization is concluded to be a promising approach to addressing the issues of color impurity and poor spectral stability of polyfluorenes.