Eu3+-Based Bridged Silsesquioxanes for Transparent Luminescent Solar Concentrators
authors Freitas, VT; Fu, LS; Cojocariu, AM; Cattoen, X; Bartlett, JR; Le Parc, R; Bantignies, JL; Man, MWC; Andre, PS; Ferreira, RAS; Carlos, LD
nationality International
journal ACS APPLIED MATERIALS & INTERFACES
author keywords organic-inorganic hybrids; lanthanide complex; sol-gel; thin films; luminescent solar concentrator
keywords ORGANIC-INORGANIC MATERIALS; HYBRID MATERIALS; STRUCTURAL EVOLUTION; LANTHANIDE COMPLEXES; RECENT PROGRESS; THIN-FILMS; POLYSILSESQUIOXANES; EUROPIUM(III); UV; POLYCONDENSATION
abstract The sol-gel preparation of a bridged silsesquioxane containing europium(III) salts and 2-thenoyltrifluoroacetone has been achieved from a new ethane tetracarboxamide-based organosilane. Free-standing films with thicknesses up to 440 mu m and maximum absolute quantum yield (q) of 0.34 +/- 0.03 (excitation at 320 nm) were prepared by the drop cast method, while thin films (similar to 200-400 nm) spin-coated on glass substrates led to highly luminescent coatings with q = 0.60 +/- 0.02 (excitation at 345 nm). The thin films were tested as planar luminescent solar concentrators and the optimized device displays an optical conversion efficiency of 12.3% in the absorbing spectral region of the active layer (300-380 nm).
publisher AMER CHEMICAL SOC
issn 1944-8244
year published 2015
volume 7
issue 16
beginning page 8770
ending page 8778
digital object identifier (doi) 10.1021/acsami.5b01281
web of science category Nanoscience & Nanotechnology; Materials Science, Multidisciplinary
subject category Science & Technology - Other Topics; Materials Science
unique article identifier WOS:000353931300048
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