| abstract |
The invention discloses an organic light-emitting device which comprises a transparent substrate, an anode, a hole transfer layer, an electron blocking layer, a light emitting layer, a hole blocking layer, an electron transfer layer and a cathode which are sequentially stacked, wherein the hole blocking layer is made from an organometallic complex, the ligand of the organometallic complex is hydroxyquinoline, hydroxyquinoline derivative, hydroxyl benzoquinoline or hydroxyl benzoquinoline derivative. The hole blocking layer of the organic light-emitting device is made from an organometallic complex, the film formation quality of the organometallic complex is good so as to be good for preventing the diffusion of a hole to the light emitting layer, and compared with a traditional organic light-emitting device, the luminous efficiency is improved. The invention further provides a preparation method of the organic light-emitting device. |