Organic electroluminescent element

An organic electroluminescent element, comprising:

• a reflection electrode;
• a transparent electrode;
• and
• an organic light-emitting layer that is between the reflection electrode and the transparent electrode,
• the organic light-emitting layer containing at least three colors of luminescent materials, the luminescent materials being first, second and third luminescent materials, the first luminescent material having a maximum light emission wavelength within a range of 430 nm to 480 nm, the second luminescent material having a maximum light emission wavelength within a range of 510 nm to 610 nm, the third luminescent material having a maximum light emission wavelength within a range of 580 nm to 630 nm,
• the organic electroluminescent element having a light emission surface, an average value of average color rendering indexes in a wide angle region of 30° to 60° with respect to a front direction of the light emission surface being higher than an average color rendering index in the front direction,
• wherein the organic light-emitting layer comprises a first light-emitting layer containing the first luminescent material, a second light-emitting layer containing the second luminescent material and a third light-emitting layer containing the third luminescent material,
• wherein the second and third light-emitting layers are disposed between the reflection electrode and the first light-emitting layer, and
• wherein the second and third light-emitting layers have a relationship of “(n3×d3)/λ3≧(n2×d2)/λ2”, and a value of “(n2×d2)/λ2” is in a range of 0.15 to 0.3, where “n3” denotes a refractive index of material between the reflection electrode and the third light-emitting layer, “d3” denotes a dimension between the reflection electrode and the third light-emitting layer, “λ3” denotes the maximum light emission wavelength of the third luminescent material, “n2” denotes a refractive index of material between the reflection electrode and the second light-emitting layer, “d2” denotes a dimension between the reflection electrode and the second light-emitting layer, and “λ2” denotes the maximum light emission wavelength of the second luminescent material.