Patent ID: 9331296
Filing Date: 2016-05-03
CPC Classification: C09K,H01L,H05B

Claim Text:
1. An organic light-emitting device comprising: a pair of electrodes having an anode and a cathode; a light-emitting layer arranged between the pair of electrodes, the light-emitting layer containing a host material and a blue-fluorescent dopant material having the ability to trap electrons; and a hole-blocking layer adjacent to the light-emitting layer, wherein the energy of the lowest unoccupied molecular orbital of the host material (LUMO (host)) and the energy of the LUMO of the blue-fluorescent dopant material (LUMO (dopant)) satisfy the following expression: the energy of the highest occupied molecular orbital of the host material (HOMO (host)) and the energy of the HOMO of the blue-fluorescent dopant material (HOMO (dopant)) satisfy the following expression: the energy of the lowest excited triplet state of the host material (T the host material and a material for the hole-blocking layer are different hydrocarbon compounds, each of the hydrocarbon compounds having a plurality of mono- or higher-valent unsubstituted or alkyl-substituted aromatic hydrocarbon moieties, and the aromatic hydrocarbon moieties being linked together only by a single bond, and a substructure containing the single bond and the aromatic hydrocarbon moieties linked together by the single bond is represented only by general formula [1] or [2]: (wherein thick lines illustrated in formulae [1] and [2] each indicate the single bond).