ORGANIC LIGHT-EMITTING DEVICE, DISPLAY APPARATUS, IMAGE INFORMATION-PROCESSING APPARATUS, AND IMAGE-FORMING APPARATUS

摘要

Provided is an organic light emitting device having high efficiency and capable of being driven at a low voltage. An organic light emitting device (1) includes a positive electrode (21), a negative electrode (26), and an organic compound layer including at least a light emission layer (23) between the positive electrode (21) and the negative electrode (26). The organic light emitting device (1) includes: between the positive electrode (21) and the light emission layer (23), a first layer (22a) including a first organic semiconductor material and a transition metal oxide; and a second layer (22b) making contact with the first layer (22a) at an interface on a side closer to the positive electrode (21) and including a second organic semiconductor material. The refractive index of the first organic semiconductor material is less than 1.6. The ionization potential of the first organic semiconductor material is equal to or larger than the ionization potential of the second organic semiconductor material.