An organic / inorganic hybrid high-refractive-index carbonized polymer dot film layer and its preparation method

By preparing a carbonized polymer dot film layer, the problem of easy agglomeration of inorganic nanoparticles in the polymer matrix is ​​solved, and a film layer with high refractive index and good processing performance is achieved, which is suitable for high-performance optoelectronic devices.

CN119119822BActive Publication Date: 2025-09-12JILIN UNIVERSITY
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Patent Information

Application Number
CN202411217278.4
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-09-02
Publication Date
2025-09-12
Estimated Expiration
2044-09-02

AI Technical Summary

Technical Problem

Traditional inorganic nanoparticles are prone to agglomeration in polymer matrices and have poor refractive index controllability, making it difficult to meet the design requirements of high-performance optoelectronic devices.

Method used

Carbonized polymer dots (CPDs) were used as organic/inorganic hybrid materials. High-refractive-index CPDs were prepared by a solvent-thermal method, and a cross-linked structure was formed during the thermal curing process to prepare a high-refractive-index carbonized polymer dot film layer.

Benefits of technology

A film layer with high refractive index, easy synthesis and stable structure is achieved, the problem of agglomeration of inorganic nanoparticles in the polymer matrix is ​​solved, and the refractive index and processing performance of the material are improved.

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Abstract

An organic / inorganic hybrid high-refractive index carbonized polymer dot film layer and its preparation method belong to the technical field of high-refractive index nanoparticle preparation. It first prepares high-refractive index CPDs by a solvent thermal method, then dissolves them in a solvent, and obtains a film layer solidification liquid after uniform dissolution; then it is coated on a substrate and thermally cured to obtain a high-refractive index carbonized polymer dot film layer. The high-refractive index carbonized polymer dot film layer prepared by the present invention has a high refractive index and is easy to form and process. It can be used to prepare anti-reflective coatings by preparing film layers with different refractive index gradients to increase the visible light transmittance of the substrate, which can be used to improve the light extraction efficiency of OLEDs; or a high-refractive index carbonized polymer dot film layer and a low-refractive index polymer are stacked to prepare a Bragg reflector. By controlling the thickness of the stacking layer, high reflectivity of light in a specific band can be achieved, which can be used in colorful structural color anti-counterfeiting coatings.
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