Fabrication of haze controlled glass-fabric reinforced quantum dot hybrimer phosphor film

Abstract

Quantum dot displays have become very popular in the display market in recent years. Quantum dot, a semiconductor nanocrystal, can selectively emit light of a desired wavelength across visible light by controlling the radius of the nanocrystal. Because of these characteristics, Quantum dot is attracting attention as a color conversion material for next generation display materials and lighting. There are three ways in which quantum dot can be applied to a light emitting diode: on-chip type, edge type, and film type. Currently, film type is being studied most actively. In the case of a film type, a thin film or sheet can be produced by dispersing a quantum dot in a transparent polymer resin and curing it. As the method used at this time, there is a coating method such as spin coating and drop casting. In a recent study, a method of adding inorganic oxide particles such as alumina or silica or polymer particles such as polymethylmethacrylate as a scattering agent into a film has been reported to increase the light extraction efficiency of the quantum dot film. However, the complexity of the process due to the additional process and lowering of the uniformity of the luminous efficiency due to the coagulation phenomenon have been raised. In this study, quantum dots were prepared by impregnating dispersed siloxane resin into glass-fabric and curing it together to produce a film having excellent optical, thermal and mechanical properties. In the original study, inorganic oxide particles or polymer particles were added to increase the light extraction efficiency. However, there was a problem that not only the aggregation phenomenon but also the quantum dot could not be uniformly dispersed in the matrix. However, the glass fiber reinforced organic-inorganic composite hybrid film impregnated with glass-fabric can exhibit an even luminous distribution through the glass-fabric and can easily scatter light within the film due to the haze due to the difference in refractive index between the glass-fabric and the siloxane matrix. So that the luminous efficiency can be increased. The quantum dot glass-fabric reinforced hybrid film thus produced is expected to be used as a color conversion material for next-generation displays and lighting due to its excellent mechanical, thermal and optical properties.