Organic light-emitting display apparatus

An organic light-emitting display apparatus comprising a substrate, and an organic light-emitting device disposed on the substrate;

• said organic light-emitting device comprising an anode layer, a cathode layer, and an organic light-emitting dielectric layer disposed between the anode layer and the cathode layer;
• said organic light-emitting dielectric layer comprising a hole injection layer, a hole transporting layer, a first mixed layer, an emission layer, an electron transporting layer, and an electron injection layer, which are sequentially disposed on said anode layer, nearly to a side of the cathode layer;
• and
• said first mixed layer being a mixed material layer consisting of a bipolar host material and a first functional doping material;
• wherein said bipolar host material is a compound having a function of simultaneously transporting hole and electron;
• said first functional doping material is a material having an electron blocking function, a material having a hole control function, or both thereof in combination;
• wherein a thickness of said first mixed layer is 10-500 Å, which is doped with the first functional doping material in a weight percent ratio of 1%-50%;
• and
• wherein said substrate is a TFT substrate;
• in said organic light-emitting device, the anode layer, the organic light-emitting dielectric layer, and the cathode layer are sequentially disposed on said substrate from bottom to top;
• or
• in said organic light-emitting device, the cathode layer, the organic light-emitting dielectric layer, and the anode layer are sequentially disposed on said substrate from bottom to top.