UV-converting blue-emitting polyfluorene-based organic-inorganic hybrids for solid state lighting

Photophysical and Theoretical Interpretation of the Insensitive Emission to Temperature of a Metallopolymer Containing Europium Ions

“…Metallopolymers are considered to be in the forefront of luminescent applications in the fields of electroeletronic devices, nanobiomedical, microelectronics, microfluidics, and luminescent sensors. , The hybrid characteristics of metallopolymers allow the combination between the metallic and the organic parts, giving rise to new properties in optics and electronics applications. − To explore the properties of metallopolymers, lanthanide coordination polymers can assume three main configurations: type I in which the lanthanide is linked to a lateral chain of the polymer, without electronic interaction with the main chain; type II in which the metal is inserted into the polymer as ramification, interacting with its π system; and type III in which the metallic center is directly linked to the polymer backbone. Each type has its own advantages and disadvantages, depending on the envisaged application. − Recently, metallopolymers as ratiometric luminescent probes have attracted great attention because apart from the interest in soluble molecular luminophores showing temperature-dependent luminescence, they can afford more robust signals and can eliminate most of the ambiguities. , …”

Synthesis, Optical and Electrical Characterization of Amino-alcohol Based Sol-gel Hybrid Materials

“…Amino-alcohol silicate samples and their photoluminescence response after an excitation with a light with a wavelength of 365 nm.The blue color of the A(148), A(270), A(403), and A(170) xerogels after excitation with UV radiation arises from the photoluminescence emission in the 450-470 nm region[29]. It is generally accepted that silicon-based materials can emit light within a wide energy region that ranges from ultraviolet to infrared[2,64,65]. The backbone silicon-based structures are responsible for the emission energy, i.e., an increase in the siliceous network may result in a decrease in the…”

2,2′-Bipyrimidine as a Building Block for the Design of Emissive Conjugated Polymers for Hybrid LED Lighting

“…Incorporating the sol-gel matrix into the phosphor thus resulted in a 3-fold enhancement of the photostability of the phosphor. Among conjugated polymers comprising different units in their backbone, polyfluorene derivatives have been reported to be relatively highly sensitive to UV light degradation in the presence of oxygen, 22 while carbazole was described to be somewhat more stable. A stability study similar to that described for P1 was conducted for P2.…”

“…[10][11][12][13][14][15][16][17][18][19] Comparatively, conjugated polymers have only very rarely been investigated as phosphors for LED lighting. [20][21][22][23][24][25][26][27] Especially, the literature dealing with investigations on the photostability of such phosphors is almost virgin.…”

“…Especially, polyfluorene derivatives have attracted a great deal of attention thanks to both their high emission efficiency in the visible, in particular in the blue, and their semiconducting properties. Thus, they have been widely investigated as blue emitters or matrices in electroluminescent devices. − Comparatively, conjugated polymers have only very rarely been investigated as phosphors for LED lighting. − Especially, the literature dealing with investigations on the photostability of such phosphors is almost virgin.…”