Coating composisiotn having polysilazane and wavelength converting agent and wavelength converting sheet prepared using the same

Abstract

There are provided a coating composition having excellent visible light transmittance and photoluminescence properties, and a wavelength converting thin film prepared by using the same. The coating composition according to the present invention includes a solvent, polysilazane, and a wavelength converting agent, and has visible light transmittance of 50% or more with respect to an aqueous solution. According to the present invention, a wavelength converting thin film having excellent visible light transmittance and photoluminescence properties can be prepared.

Description

[0001] This application claims priority and benefit from Korean Patent Application No. 2014-0019723 filed on February 20, 2014, the disclosure of which is hereby incorporated by reference in its entirety. technical field [0002] The invention relates to a coating composition with excellent visible light transmittance and photoluminescence performance and a wavelength conversion sheet prepared using the composition. Background technique [0003] Polysilazane is a general term for polymers with an ordered arrangement of silicon and nitrogen, and has [-R 1 R 2 Si-NR 3 -] n Structure. Functional group R 1 , R 2 and R 3 Can be hydrogen or organic matter. When all the functional groups are hydrogen, it is called perhydropolysilazane; when the functional group is hydrocarbon, it is called organopolysilazane. Polysilazanes have the ability to be converted to silica-based materials by reacting with moisture at or below 200°C [-R 1 R 2 Si-O-] n nature. The volume of the p...

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Problems solved by technology

On the other hand, this inorganic material requires sintering at a high temperature of 700°C or higher, and there are also problems that during sintering, the substrate may be deformed, the wavelength converting agent may be denatured, or the wavelength converting film may be damaged. crack

However, in this case, i.e., during the process of gelling the sol precursor, cracks and localized defects appear due to significant volume shrinkage (50% or more)

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