▎ 摘　　要

NOVELTY - The device has a substrate (1), an anode (2), a hole injection layer (3), a hole transport layer (4), an electron blocking layer (5), a red light emitting layer, a hole blocking layer, an electron transport layer, an electron injection layer and a conductive cathode orderly laminated from bottom to top. The hole injection layer has double effects of optical coupling enhancement and carrier transmission balance. The surface of the processed film forms a light scattering micro-structure using solvent treatment. USE - Red light organic LED (OLED) device with integrated hole injection layer with optical coupling enhancement and carrier transmission balance. ADVANTAGE - The device is simple to process, and has high luminous efficiency, and reduces hole mobility, realizes double effect of red light OLED device light coupling enhancement and hole/electron transmission balance and overcomes defect of serious leakage current caused by traditional solvent engineering technology. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for preparing a red light OLED device with an integrated hole injection layer with enhanced light coupling and balanced carrier transport, comprising (i) cleaning the substrate and anode, drying with nitrogen; (ii) using spin coating, printing, spraying or evaporation methods, preparing hole injection layer on the surface of the anode using hole injection layer materials; (iii) heating preferred solvent in a closed container to generate high-concentration vapor atmosphere for gas phase treatment, and adjusting flow rate of the solvent gas, placing hole injection layer film in a container and allowing to stand for a set time before taking it out, and choosing different annealing temperatures according to the solvent used to anneal and drying the film; (iv) using spin coating, printing, spraying or evaporation methods, laminating surface of the hole injection layer treated in step (iii) to prepare a hole transport layer, electron blocking layer, red light emitting layer, hole blocking layer, electron transport layer, electron injection layer; and (v) replacing the mask, and then evaporating cathode material on the surface of the electron injection layer prepared in step (iv) to form the electrode cathode layer, and making the functional layers of the OLED. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of the structure of an organic light emitting diode (Drawing includes non-English language text). Substrate (1) Anode (2) Hole injection layer (3) Hole transport layer (4) Electron blocking layer (5)