Idemitsu Kosan has been granted a patent for an organic electroluminescence device featuring an anode, cathode, and an emitting layer. The emitting layer includes a delayed fluorescent compound and a deuterium-containing compound, with specific energy relationships between the compounds defined in the claims. 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 July 2024 was 42%. Grant share is based on the ratio of number of grants to total number of patents.

Organic electroluminescence device with specific fluorescent compounds

Source: United States Patent and Trademark Office (USPTO). Credit: Idemitsu Kosan Co Ltd

The patent US12075699B2 describes an organic electroluminescence device that includes an anode, a cathode, and an emitting layer situated between them. The emitting layer is characterized by the presence of a delayed fluorescent compound (M2) and another compound (M3) that contains at least one deuterium atom. Notably, the relationship between the singlet energies of these compounds is defined by a specific numerical formula, ensuring that the singlet energy of M3 exceeds that of M2. Additional claims expand on the composition of the emitting layer, allowing for the inclusion of a fluorescent compound (M1) and stipulating that the singlet energy of M2 must also be greater than that of M1.

Further claims detail the structural characteristics of compound M3, which may include various partial structures and functional groups, such as cyano or amino groups, and residues derived from a range of organic compounds. The patent also specifies that both M2 and M3 must contain deuterium atoms, enhancing their properties. The device may incorporate electron and hole transporting zones, which consist of one or more organic layers, potentially improving the efficiency of the electroluminescent process. The claims also outline specific energy relationships and structural requirements for the compounds involved, indicating a focus on optimizing the performance of the organic electroluminescence device for potential applications in electronic devices.

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GlobalData’s Patent Analytics tracks patent filings and grants from official offices around the world. 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.