Idemitsu Kosan. has filed a patent for a color conversion particle with a core and shell that emits light upon absorbing excitation light. The shell, made of chalcogenide perovskite, induces a Stokes shift with band alignment. GlobalData’s report on Idemitsu Kosan 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 Idemitsu Kosan, Anti-wear lubricants was a key innovation area identified from patents. Idemitsu Kosan's grant share as of January 2024 was 29%. Grant share is based on the ratio of number of grants to total number of patents.
Color conversion particle with core and shell emitting light
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The patent application (Publication Number: US20240034926A1) describes a color conversion particle with a core and a shell that absorbs excitation light and emits light at the core or interface upon irradiation. The shell is made of a chalcogenide perovskite, and the core and shell have band alignment inducing a Stokes shift. The chalcogenide perovskite can have various crystal structures and chemical formulas, with the band alignment satisfying specific conditions to achieve the desired emission properties.
Furthermore, the color conversion particle can have a shell thickness ranging from 2 nm to 300 nm, with a band gap of the shell being 3.4 eV or less. The shell may consist of multiple layers or cores, and the core can contain a light-absorbing material. Additionally, the core and shell structures can vary, with the core being composed of a different chalcogenide perovskite from the shell. The patent also covers powders, solutions, thin films, sheets, and devices incorporating these color conversion particles for various applications.
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