China Three Gorges patented an organic polymer with an asymmetric structure for high-performance perovskite solar cells and organic solar cells. The compound offers good heat stability, controllable absorption levels, and is suitable for large-area applications. The patent outlines a detailed preparation method involving specific compounds and purification techniques. GlobalData’s report on China Three Gorges gives a 360-degree view of the company including its patenting strategy. Buy the report here.

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According to GlobalData’s company profile on China Three Gorges, AI assisted CAD was a key innovation area identified from patents. China Three Gorges's grant share as of February 2024 was 66%. Grant share is based on the ratio of number of grants to total number of patents.

Preparation of asymmetric organic polymer for solar cell materials

Source: United States Patent and Trademark Office (USPTO). Credit: China Three Gorges Corp

A recently granted patent (Publication Number: US11898001B2) discloses a preparation method for an asymmetric organic polymer. The method involves dissolving specific compounds in a mixture of toluene and N, N-dimethylformamide in a three-necked bottle, followed by the addition of Pd2 (dba) 3 and p-(o-tol) 6 mg. The solution is then heated and refluxed for 4 hours, resulting in a viscous solution that is cooled and loaded into anhydrous methanol for sedimentation. The solid obtained after filtration, purification using a Soxhlet extractor, and secondary purification through column chromatography yields a blue-black solid product.

This method provides a detailed procedure for synthesizing the asymmetric organic polymer, starting from specific compounds dissolved in a solvent mixture and undergoing various purification steps to obtain the final product. The use of specific reagents and purification techniques outlined in the patent aims to ensure the successful synthesis of the desired polymer with high purity and yield. The disclosed reaction formula further elucidates the chemical process involved in the preparation method, offering insights into the molecular structure of the resulting blue-black solid product.

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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.