Patent ID: 9461260
Filing Date: 2016-10-04
CPC Classification: H01L

Claim Text:
1. An organic light emitting device comprising: an anode; a cathode; and organic compound layers placed between the anode and the cathode, wherein the organic compound layers include at least a hole transport layer and an emitting layer, the hole transport layer and the emitting layer being in contact with each other; wherein the hole transport layer has an arylamine compound and an aromatic hydrocarbon compound; wherein the aromatic hydrocarbon compound may have an alkyl group and the aromatic hydrocarbon compound satisfies the following requirements (i) and (ii): (i) the compound comprises a compound constituted only of carbon atom and hydrogen atom, and (ii) the compound has a partial structure represented by one of the following general formulae (ii-1) and (ii-2): wherein the emitting layer has a host and an electron trap dopant; and wherein the host and the electron trap dopant satisfy the following expressions (A) and (B): where, in the expressions (A) and (B), E