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

A light-emitting device comprising an EL layer between a first electrode and a second electrode,

• wherein the first electrode is a reflective electrode and the second electrode is a semi-transmissive and semi-reflective electrode,
• wherein the EL layer emits light having an emission peak in a wavelength range from 750 nm to 1000 nm, and
• wherein reflectance of one or both of the first electrode and the second electrode with respect to light with a wavelength of 850 nm is higher than the reflectance thereof with respect to light with a wavelength of 500 nm.

A light-emitting device comprising an EL layer between a first electrode and a second electrode,

• wherein the first electrode is a reflective electrode and the second electrode is a semi-transmissive and semi-reflective electrode,
• wherein the EL layer comprises a light-emitting substance having an emission peak in a wavelength range from 750 nm to 1000 nm, and
• wherein light emitted from the EL layer has longer wavelength than the emission peak of the light-emitting substance.