ORGANIC ELECTROLUMINESCENT ELEMENT, AND ELECTRONIC EQUIPMENT

• Main Authors: NISHIMURA KAZUKI, AOYAMA YOSHINORI
• Format: Patent
• Language: English; Japanese
• Published: 19.08.2022
• Subjects: ADHESIVES; CHEMISTRY; DYES; ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; HETEROCYCLIC COMPOUNDS; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC CHEMISTRY; PAINTS; POLISHES

To provide an organic electroluminescent element and electronic equipment of which the excellent efficiency and long life can be made compatible.SOLUTION: An organic electroluminescent element is provided which includes: an anode; a light-emitting layer including a host material; a first electron transport layer including a first compound; a second electron transport layer including a second compound; and a cathode, in this order, wherein an absolute value of difference between an affinity value of the host material and an affinity value of the first compound is equal to or less than 0.20, an absolute value of difference between the affinity value of the first compound and the affinity value of the second compound is equal to or less than 0.20, the first compound and the second compound are different compounds, and electron mobility of the second electron transport layer is less than 1.00×10-4 cm2/Vs, the second electron transport layer includes no Li, and the second electron transport layer includes no quinolate complex of Li.SELECTED DRAWING: None 【課題】効率と寿命を両立できる有機エレクトロルミネッセンス素子、及び電子機器を提供する。【解決手段】陽極と、ホスト材料を含む発光層と、第１の化合物を含む第１の電子輸送層と、第２の化合物を含む第２の電子輸送層と、陰極と、をこの順で含み、前記ホスト材料のアフィニティ値と、前記第１の化合物のアフィニティ値と、の差の絶対値が０．２０以下であり、前記第１の化合物のアフィニティ値と、前記第２の化合物のアフィニティ値と、の差の絶対値が０．２０以下であり、前記第１の化合物と、前記第２の化合物と、は異なる化合物であり、前記第２の電子輸送層の電子移動度が１．００×１０－４ｃｍ２／Ｖｓ未満であり、前記第２の電子輸送層がＬｉを含まず、前記第２の電子輸送層がＬｉのキノラート錯体を含まない有機エレクトロルミネッセンス素子。【選択図】なし