INK COMPOSITION, LUMINESCENT LAYER, AND ELECTROLUMINESCENT ELEMENT

• Main Author: CHISAKA JIRO
• Format: Patent
• Language: English; Japanese
• Published: 24.06.2021
• Subjects: ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; ADHESIVES; BASIC ELECTRIC ELEMENTS; CHEMISTRY; CORRECTION OF TYPOGRAPHICAL ERRORS; DYES; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; LINING MACHINES; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; PAINTS; PERFORMING OPERATIONS; POLISHES; PRINTING; SELECTIVE PRINTING MECHANISMS; SEMICONDUCTOR DEVICES; STAMPS; TRANSPORTING; TYPEWRITERS; USE OF MATERIALS AS ADHESIVES

To provide: an electroluminescent element which can reduce the driving voltage without inhibiting electric energy infusion into quantum dots and has reduced damage to an underlayer caused by lamination, and is excellent in luminous efficacy and durability; a luminescent layer thereof; and an ink composition for forming them.SOLUTION: The ink composition comprises quantum dots and a solvent. The quantum dots comprise a carrier-transporting ligand having at least one functional group selected from the group consisting of a sulfanyl group and a carboxyl group. The solvent comprises one or more solvents selected from the general formulas (1) to (4). The total amount of the solvents of the general formulas (1) to (4) is 50 mass% or more based on the total amount of the solvent.SELECTED DRAWING: None 【課題】量子ドットへの電気エネルギー注入を阻害することなく駆動電圧の低減が可能であり、かつ、積層による下層へのダメージが抑制された発光効率や耐久性に優れた電界発光素子と、その発光層、さらに、それらを形成するためのインキ組成物の提供。【解決手段】上記課題は、量子ドット及び溶剤を含み、前記量子ドットが、スルファニル基及びカルボキシル基からなる群から選ばれる少なくとも１種の官能基を有するキャリア輸送性リガンドを含み、前記溶剤が、一般式（１）〜（４）より選ばれる少なくとも１種の溶剤を含み、一般式（１）〜（４）の溶剤の合計量が、溶剤全量に対して５０質量％以上である、インキ組成物によって解決される。【選択図】 なし