ORGANIC ELECTROLUMINESCENT DEVICE AND PREPARATION METHOD THEREOF

摘要

Disclosed are an organic electroluminescent device and a preparation method thereof. The organic electroluminescent device is a top-emitting organic electroluminescent device having a reversed structure, and the preparation method is: dissolving zinc oxide with acetic acid to obtain a zinc oxide solution with a concentration of 0.3 g/ml—0.6 g/ml, adding a phthalocyanine substance in a mass of 1% - 10% of the mass of the zinc oxide to obtain a mixture, spin-coating the mixture on a glass substrate (1) and then drying to obtain a cathode (2), and then preparing by vapour deposition, an electron injection layer (3), an electron transport layer (4), a luminescent layer (5), a hole transport layer (6), a hole injection layer (7) and an anode (8), successively, so as to obtain the organic electroluminescent device. The organic electroluminescent device uses a reversed structure, and the cathode (2) uses zinc oxide and a phthalocyanine substance as starting materials such that the electron injection capability of the cathode (2) is improved, and the light rays are reflected, increasing the light emitting efficiency and improving the light emitting effect; thus, the preparation method is simple and low cost.