ORGANIC EL ELEMENT, ORGANIC EL PANEL, AND MANUFACTURING METHOD FOR ORGANIC EL ELEMENT

• Main Authors: SATO MUNEHARU, SEKIMOTO YASUHIRO, ISHINO SHINICHIRO, ODA TOMOHIKO, HASEGAWA MINEKI, AKIYAMA TOSHIYUKI, KAMIYA KEN, TAKADA MASAKAZU
• Format: Patent
• Language: English; Japanese
• Published: 18.05.2022
• Subjects: ADVERTISING; BASIC ELECTRIC ELEMENTS; CRYPTOGRAPHY; DISPLAY; DISPLAYING; EDUCATION; ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; LABELS OR NAME-PLATES; PHYSICS; SEALS; SEMICONDUCTOR DEVICES; SIGNS

To provide an organic EL element, an organic EL panel, and a manufacturing method for an organic EL element, in which the increase in driving voltage is suppressed even if the carrier injection property to a light-emitting layer decreases due to deterioration of a functional layer.SOLUTION: An organic EL element 1 includes an anode 13, a plurality of functional layers including a light-emitting layer 17, and a cathode 20 that are stacked in this order. For each of the functional layers, when the value obtained by dividing the thickness of the functional layer by the effective carrier mobility, which is the addition value of the effective electron mobility of the functional layer and the effective hole mobility, is the effective film thickness of the functional layer, the effective film thickness of the light-emitting layer is 30% or less of the total value of the effective film thicknesses of all the functional layers.SELECTED DRAWING: Figure 1 【課題】機能層の劣化により発光層へのキャリア注入性が低下しても、駆動電圧が上昇しづらい有機ＥＬ素子および有機ＥＬパネル、および、有機ＥＬ素子の製造方法を提供する。【解決手段】陽極１３と、発光層１７を含む複数の機能層と、陰極２０とがこの順に積層されてなる有機ＥＬ素子１であって、機能層のそれぞれについて、機能層の実効電子移動度と実効ホール移動度との加算値である実行キャリア移動度で機能層の膜厚を除した値を機能層の実効膜厚としたとき、発光層の実効膜厚は、全ての機能層の実効膜厚を合計した値の３０％以下である。【選択図】図１