Oled display substrate and method for manufacturing the same, display device and packaging method thereof

A method for packaging a display device, comprising:

• providing an OLED display substrate;
• forming at least one final solid organic packaging layer;
• and
• providing a packaging cover plate on the last one of the final solid organic packaging layer,
• wherein the step of forming the final solid organic packaging layer comprises:
• forming an initial solid organic packaging layer with a material including a component having an azobenzene group;
• liquefying the initial solid organic packaging layer into a liquid organic packaging layer by irradiating it with ultraviolet light;
• and
• curing the liquid packaging organic layer to obtain the final solid organic packaging layer by irradiating it with visible light.

An OLED display substrate comprising an substrate, a first electrode layer, a light emitting functional layer and a second electrode layer successively,

• wherein the OLED display substrate further comprises a final solid buffer layer between the light emitting functional layer and the first electrode layer;
• the final solid buffer layer is formed by a material comprising a component having an azobenzene group;
• and
• the final solid buffer layer has a HOMO energy level between −6 eV and −4.5 eV and a LUMO energy level between −3 eV and −2 eV.