LONGi Green Energy Technology has been granted a patent for a tandem cell that enhances hole transmission performance. The design features a bottom cell, a p-type delafossite hole transporting layer, a perovskite absorbing layer, and a transparent conducting layer, optimizing photoelectric conversion efficiency. GlobalData’s report on LONGi Green Energy Technology 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 LONGi Green Energy Technology, Artificial photosynthesis was a key innovation area identified from patents. LONGi Green Energy Technology's grant share as of July 2024 was 56%. Grant share is based on the ratio of number of grants to total number of patents.
Tandem cell with improved hole transmission performance
The granted patent US12058876B2 describes a tandem cell designed for enhanced photovoltaic performance. The tandem cell consists of a bottom cell, a hole transporting layer made from a semiconductor material with a p-type delafossite structure, a perovskite absorbing layer, and a transparent conducting layer. The hole transporting layer features a valence band top energy level that decreases sequentially away from the bottom cell, optimizing charge transport. The semiconductor material's general chemical formula is specified, allowing for various combinations of elements, including copper, silver, and trivalent rare earth cations, with oxygen group elements. The claims also detail the thickness of the hole transporting layer and the potential inclusion of an n-type heavily doped layer to facilitate carrier recombination.
Additionally, the patent outlines a method for manufacturing the tandem cell, which involves several steps including the formation of the hole transporting layer through a vacuum deposition process, followed by the creation of the perovskite absorbing layer. Specific techniques for forming the perovskite layer, such as co-evaporation and solution coating, are also described. The claims emphasize the structural and compositional variations of the layers, including the sequential increase of component B in the hole transporting layer as it approaches the perovskite layer. This innovative design and manufacturing method aim to improve the efficiency and performance of solar cells by leveraging advanced materials and layered structures.
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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.
