Engineering of metal-free bipyridine-based bridged silsesquioxanes for sustainable solid-state lighting

abstract

We demonstrate an improvement of the emission quantum yield and the luminance figures of merit of metal-free bridged silsesquioxanes-by a factor of 2, 0.43 +/- 0.04, and by two orders of magnitude, (1.4 +/- 0.1) x 10 4 cd m(-2), respectively-by changing the regioisomer of the silylated precursor. The organic-inorganic hybrids are easily excited by commercial blue InGaN-based light emitting diodes (LEDs) displaying an intriguing potential to applications in green photonics as metal-free phosphors for solid state lighting.

keywords

EMITTING-DIODES; HYBRIDS; EFFICIENT; PHOSPHORS; BLINKING; EMISSION

subject category

Chemistry; Materials Science

authors

Graffion, J; Cattoen, X; Freitas, VT; Ferreira, RAS; Man, MWC; Carlos, LD

our authors

acknowledgements

We acknowledge the financial support of Fundacao para a Ciencia e a Tecnologia (FCT, Portugal), COMPETE and FEDER programs (PTDC/CTM/101324/2008). JG gratefully acknowledges the

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