The invention relates to the field of
display device technology, more particularly, to an organic light-emitting
diode device and a manufacturing method thereof and an organic light-emitting display panel, which changes the traditional micro-cavity structure, spin-coatings the liquid filling agent on the
cathode layer to form the micro-cavity adjusting layer, and make it between the cover and the
cathode layer, on the one hand, controls the thickness of the filling agent by spin-
coating to change the
resonance node of
OLED, to achieve the strongest
resonance effect, and at the same time avoid the defect of high cost of traditional
evaporation; on the other hand, configuring the micro-cavity adjusting layer on the
cathode layer, when
OLED in working state, the length of the
electric current passing through significantly shortens, the resistance reduces, and effectively reduces the working
voltage of
OLED device and improves the emitting efficiency of OLED device.