Efficient spectrally dynamic blue‐to‐green emission of bipyridine‐based bridged silsesquioxanes for solid‐state lighting

We report a metal‐free bpy‐bridged silsesquioxane displaying an efficient and tuneable blue‐to‐green emission (maximum quantum yield and luminance values of 0.22 ± 0.02 cd m–2 and 63 ± 3 cd m–2, respectively) when excited by commercial InGaN light emitting diodes (LEDs) (385–405 nm). This is the highest quantum yield value reported so far for metal‐free phosphors easily excited by commercial InGaN long‐UV/blue LEDs bringing organic/inorganic hybrids on the way to applications as metal‐free phosphors for smart LED‐based lighting and LED‐addressed displays. (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

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