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Efficient spectrally dynamic blue‐to‐green emission of bipyridine‐based bridged silsesquioxanes for solid‐state lighting
Author(s) -
Nobre Sónia S.,
Cattoën Xavier,
Ferreira Rute A. S.,
Man Michel Wong Chi,
Carlos Luis D.
Publication year - 2010
Publication title -
physica status solidi (rrl) – rapid research letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.786
H-Index - 68
eISSN - 1862-6270
pISSN - 1862-6254
DOI - 10.1002/pssr.200903396
Subject(s) - phosphor , quantum yield , light emitting diode , excited state , silsesquioxane , materials science , optoelectronics , diode , metal , luminance , luminescence , photochemistry , chemistry , fluorescence , optics , polymer , physics , metallurgy , composite material , nuclear physics
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)