LONGi Green Energy Technology had 18 patents in advanced materials during Q4 2023. LONGi Green Energy Technology Co Ltd filed patents for a tandem cell with improved hole transmission performance and a simplified structure for optimized photoelectric conversion efficiency. Another patent involves a solar cell with a perovskite layer that gradually decreases in band gap from the light-facing surface to the back surface, resulting in a wide absorption spectrum and improved energy conversion efficiency while simplifying the structure and improving industrial production. GlobalData’s report on LONGi Green Energy Technology gives a 360-degreee view of the company including its patenting strategy. Buy the report here.

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LONGi Green Energy Technology grant share with advanced materials as a theme is 33% in Q4 2023. Grant share is based on the ratio of number of grants to total number of patents.

Recent Patents

Application: Laminated battery and method for fabrication thereof (Patent ID: US20230371292A1)

The patent filed by LONGi Green Energy Technology Co Ltd describes a tandem cell and its manufacturing method aimed at enhancing the hole transmission performance of the cell. The tandem cell consists of a bottom cell, a hole transporting layer with a p-type delafossite structure semiconductor material, a perovskite absorbing layer, and a transparent conducting layer. The valence band energy level of the hole transporting layer decreases away from the bottom cell, serving the dual purpose of carrier transport and recombination, simplifying the cell structure, and optimizing photoelectric conversion efficiency.

The claims detail the composition and structure of the tandem cell, including the semiconductor material formula, layer thickness, and energy levels. The method involves processes like vacuum deposition, co-evaporation, and annealing to form the various layers of the cell. The patent emphasizes the use of specific materials and sequential layering techniques to enhance the performance of the tandem cell, catering to a range of bottom cell types like crystalline silicon, gallium arsenide, and organic photovoltaic cells. Overall, the patent focuses on improving the efficiency and structure of tandem cells through innovative material selection and layering techniques.

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GlobalData, the leading provider of industry intelligence, provided the underlying data, research, and analysis used to produce this article.

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.