A promising way to obtain large, luminescent and transparent thick films suitable for optical devices

Abstract

International audienceThis work focuses on the formation of large, luminescent and transparent thick films of polyvinylpyrrolidone (PVP) embedding phosphors. Characterization of these films was made using UV-Visible absorption spectroscopy and cw-selective excitation induced photoluminescence. Results presented here demonstrate the preparation polymer films incorporating luminescent materials in order to obtain large, transparent and thick surfaces of well-dispersed phosphors suitable for use in optical devices. This technique allows the preparation of self-standing, flexible and handy films that could be easily cut or shaped and then used for various purposes

Investigation of sol-gel derived BaCl2:Eu2+ luminescent nanophosphor and the corresponding PVP@BaCl2:Eu2+ polymer nanocomposite

“…The synthesis of the fluorozirconate-based glass ceramics requires controlled atmosphere. Another option is the obtaining of hybrid inorganic-polymer composites, where luminescent particles are homogeneously dispersed into a polymer solution that is subsequently used to create luminescent composite thin films [12,13]. Nanophosphors and luminescent composite films have been considered for a broad range of applications, such as various optoelectronic devices, white light generation displays or photovoltaic applications [13][14][15][16][17][18][19].…”

Elaboration and optimization of Ce-doped Y3Al5O12 nanopowder dispersions

“…This method allows the formation of large, flexible, luminescent and transparent thick phosphor films. 10 As seen, a homogenous quality nanocomposite film, exhibiting a yellowish green luminescence under UV radiation, is obtained. For comparison, Fig.…”

“…Compared with luminescent powders used in conventional displays, phosphor films are known to exhibit superior thermal conductivity, higher degree of uniformity and better adhesion. [7][8][9][10][11] As a consequence, it is very important to prepare stable colloidal suspension of nanophosphors in order to realize homogeneous films.…”

Influence of functional nanoparticles on the photostability of polymer materials: Recent progress and further applications

“…Only a few papers address polymer encapsulation of either luminescent oxides or fluorides such as SrAl 2 O 4 :Eu 2þ , Dy 3þ , Y 3 Al 5 O 12 :Ce 3þ or CeF 3 :Yb 3þ , and Er 3þ . Formation of luminescent and transparent thick films of poly-N-vinylpyrrolidone (PVP) embedding Tb 3þ doped aluminate alkoxide can be achieved [26]. Recently, we reported PVP/phosphor nanocomposites based on a nanostructured Tb 3þ -doped Y 3 Ga 5 O 12 (YGG) powder that has been incorporated into poly-Nvinylpyrrolidone (PVP) through an alcoholic solution [49].…”

“…In the case of functional nanoparticles, such as ZnO [15], TiO 2 or phosphors [26], one has to face additional questions: i) what is the influence of the polymer degradation on the functional properties of the nanoparticles? ii) does the functionality of the nanoparticles impact the photostability of the polymer?…”