LIGHT EMITTING DEVICE, SIGN LAMP, AND DISPLAY SYSTEM

摘要

According to one embodiment, a light-emitting device includes a first light emitter, a second light emitter. The first light emitter includes a first organic layer and a second organic layer. The first organic layer includes a fluorescent material to emit a first light having a first light emission spectrum. The second organic layer is stacked with the first organic layer in a first direction. The second organic layer includes a first phosphorescent material to emit a second light having a second light emission spectrum different from the first light emission spectrum. The second light emitter includes a third organic layer to emit a third light having a third light emission spectrum different from the first light emission spectrum and the second light emission spectrum. A triplet energy of the fluorescent material is higher than a triplet energy of the first phosphorescent material.

主权项

1. A light-emitting device, comprising:
a first light emitter including
a first organic layer including a fluorescent material to emit a first light having a first light emission spectrum, anda second organic layer stacked with the first organic layer in a first direction, the second organic layer including a first phosphorescent material to emit a second light having a second light emission spectrum different from the first light emission spectrum; and a second light emitter including a third organic layer to emit a third light having a third light emission spectrum different from the first light emission spectrum and the second light emission spectrum, a triplet energy of the fluorescent material being higher than a triplet energy of the first phosphorescent material.