Marubeni has been granted a patent for a semiconductor nanoparticle complex featuring a core-shell structure with indium and phosphorus. The complex includes halogen and a ligand of mercapto fatty acid esters, enhancing its dispersibility in polar media while maintaining high fluorescence quantum yield. GlobalData’s report on Marubeni 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 Marubeni, Fuel cell powered drones was a key innovation area identified from patents. Marubeni's grant share as of July 2024 was 45%. Grant share is based on the ratio of number of grants to total number of patents.
Semiconductor nanoparticle complex with high fluorescence and dispersibility
The granted patent US12054657B2 describes a semiconductor nanoparticle complex characterized by a core-shell structure, where the core comprises indium (In) and phosphorus (P), and is enveloped by one or more shell layers. The complex incorporates halogen, with a specified molar ratio of halogen to In ranging from 0.80 to 15.00. A key feature of this complex is the ligand, which includes mercapto fatty acid esters defined by a specific general formula. These esters must have a molecular weight of 700 or less and a solubility parameter (SP) value of 9.20 or higher, with the average SP of the ligand falling between 9.10 and 11.00. The claims further detail various configurations of the ligand, including mass ratios relative to the semiconductor nanoparticle and the inclusion of aliphatic ligands.
Additionally, the patent outlines specific structural characteristics of the semiconductor nanoparticle complex, such as the composition of the shell layers, which may include materials like zinc selenide (ZnSe) and zinc sulfide (ZnS). The claims also specify the desired quantum yield and emission spectrum characteristics of the complex, indicating a quantum yield of 80% or higher and a full width at half maximum of the emission spectrum of 38 nm or lower. Furthermore, the patent encompasses a dispersion liquid containing the semiconductor nanoparticle complex in an organic medium, as well as methods for modifying the surface of the nanoparticles using the described mercapto fatty acid esters. This innovation may have implications for various applications in optoelectronics and nanotechnology.
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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.
