Light-Emitting Device, Display Apparatus, Electronic Device, Light-Emitting Apparatus, Lighting Device

    公开(公告)号:US20240349531A1

    公开(公告)日:2024-10-17

    申请号:US18700081

    申请日:2022-10-03

    Abstract: A novel light-emitting device that is highly convenient, useful, or reliable is provided. The light-emitting device includes a first electrode, a second electrode, a first layer, a second layer, and a third layer. The first layer is interposed between the first electrode and the second electrode. The second layer is interposed between the second electrode and the first layer. The third layer is interposed between the second layer and the first layer. The first layer contains a first light-emitting material. The first light-emitting material has an emission spectrum having a peak at a wavelength λ1. The first layer has an ordinary refractive index n1 at the wavelength λ1. The second layer contains a second light-emitting material. The second light-emitting material has an emission spectrum having a peak at a wavelength λ2. The second layer has an ordinary refractive index n2 at the wavelength λ2. The third layer has an ordinary refractive index n31 which is lower than the ordinary refractive index n1 at the wavelength λ1. The third layer has an ordinary refractive index n32 which is lower than the ordinary refractive index n2 at the wavelength λ2.

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