ORGANIC EL ELEMENT AND MANUFACTURING METHOD FOR THE SAME

• Main Authors: YAMAE KAZUYUKI, NISHIMORI TAISUKE
• Format: Patent
• Language: English; Japanese
• Published: 26.01.2017
• Subjects: BASIC ELECTRIC ELEMENTS; ELECTRIC HEATING; ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; SEMICONDUCTOR DEVICES

PROBLEM TO BE SOLVED: To enhance the light extraction efficiency and reliability.SOLUTION: An organic EL element 1 includes a light-transmissible substrate 10, a light control layer 20 provided on the substrate 10, and a light emitting laminate 30 provided on the light control layer 20. The light control layer 20 includes a first layer 21 and a second layer 22 which has a different refractive index from the first layer 21 and is provided on the first layer 21. At least one of the first layer 21 and the second layer 22 has irregularities 23 for diffusing light emitted from the light emitting laminate 30. A first taper angle which the end face of the first layer 21 takes with respect to the substrate 10 is different from a second taper angle which the end face of the second layer 22 takes with respect to the substrate 10.SELECTED DRAWING: Figure 1 【課題】光取り出し効率及び信頼性を向上させる。【解決手段】有機ＥＬ素子１は、透光性の基板１０と、基板１０上に設けられた光制御層２０と、光制御層２０上に設けられた発光積層体３０とを備え、光制御層２０は、第１層２１と、第１層２１とは異なる屈折率を有し、第１層２１上に設けられた第２層２２とを含み、第１層２１及び第２層２２の少なくとも一方は、発光積層体３０が発する光を拡散させる凹凸２３を有し、第１層２１の端面が基板１０に対してなす第１テーパ角度は、第２層２２の端面が基板１０に対してなす第２テーパ角度と異なっている。【選択図】図１