The invention discloses an
OLED device
cathode and display panel making method, a display panel and a
display device. The organic electroluminescent device
cathode making method comprises steps that a
cathode material is dissolved in a
solvent containing
fluorine compound to form dispersed suspension; the dispersed suspension is formed on a substrate, and the
solvent of the dispersed suspension is volatilized to form a cathode layer. The cathode making method is advantaged in that utilizing a solution method to make a cathode is realized, adverse influence caused by utilizing a cavity
coating method to make the cathode is avoided, making cost is relatively low, the method is applicable to the substrate in various specifications or prepared by various materials, for example, glass, plastic,
metal or
silicon materials can be utilized to make the substrate, the
solvent containing the
fluorine compound has no adverse influence on an
organic layer of an organic electroluminescent device, process
butt joint with an
organic film layer of the solution method can be easily realized, and
batch production of the organic electroluminescent device can be easily realized.