Organic light emitting device

An organic light emitting device comprising:

• an anode;
• a cathode;
• and
• an organic compound layer being placed between the anode and the cathode and including at least a hole transport layer and an emission layer,
• wherein the emission layer contains a blue light emitting material;
• wherein the hole transport layer contains a plurality of kinds of organic compounds;
• wherein an organic compound having the smallest ionization potential among the organic compounds includes a compound having no absorption spectrum peak in a blue color wavelength region in a radical cation state;
• wherein concentration of the organic compound having the smallest ionization potential is 5% by weight or more to 30% by weight or less of the hole transport layer;
• and
• wherein the organic compound having the smallest ionization potential is uniformly contained throughout the hole transport layer.