Light-emitting element, light-emitting device, electronic device, and lighting device

摘要

Provided is a light-emitting device which can emit monochromatic light with high purity due to a microcavity effect and which can emit white light in the case of a combination of monochromatic light. Provided is a high-definition light-emitting device. Provided is a light-emitting device with low power consumption. In a light-emitting device with a white-color filter top emission structure, one pixel is formed of four sub-pixels of RBGY, an EL layer includes a first light-emitting substance which emits blue light and a second light-emitting substance which emits light corresponding to a complementary color of blue, and a semi-transmissive and semi-reflective electrode (an upper electrode) is formed so as to cover an edge portion of the EL layer.

主权项

1. A light-emitting device comprising:
a first light-emitting element comprising a first reflective electrode, a first transparent conductive film, an EL layer, and a semi-transmissive and semi-reflective electrode; a second light-emitting element comprising a second reflective electrode, a second transparent conductive film, the EL layer, and the semi-transmissive and semi-reflective electrode; a third light-emitting element comprising a third reflective electrode, a third transparent conductive film, the EL layer, and the semi-transmissive and semi-reflective electrode; a fourth light-emitting element comprising a fourth reflective electrode, a fourth transparent conductive film, the EL layer, and the semi-transmissive and semi-reflective electrode; a first color filter over the first light-emitting element; a second color filter over the second light-emitting element; and a third color filter over the third light-emitting element, wherein the EL layer includes a first light-emitting substance which emits blue light and a second light-emitting substance which emits light corresponding to a complementary color of blue, wherein an optical path length between the fourth reflective electrode and the semi-transmissive and semi-reflective electrode is set so as to intensify the light corresponding to the complementary color of blue, wherein the semi-transmissive and semi-reflective electrode covers an edge portion of the EL layer, and wherein the fourth light-emitting element does not overlap with a color filter.