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.
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Yu et al. (2000) studied this question.
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