Functional material, its preparation method, and organic light emitting diode display panel

An organic light emitting diode display panel comprising an organic light emitting diode and an encapsulation structure for encapsulating the organic light emitting diode, wherein the surface and/or interior of the encapsulation structure comprise(s) a functional material comprising an inorganic mixed powder whose surface has a modified layer, wherein the inorganic mixed powder comprises a primary ingredient and a secondary ingredient;

• the primary ingredient consists of boron oxide, sodium oxide, lithium oxide, and zirconium oxide;
• the secondary ingredient includes any one or more of aluminum oxide, zinc oxide, titanium dioxide, silicon dioxide, calcium oxide, silver complexes, silver phosphate, silver nitrate, tourmaline, silver thiosulfate, carbon nanotubes, aluminum sulfate, manganese, manganese oxide, iron, iron oxide, cobalt, cobalt oxide, nickel, nickel oxide, chromium, chromium oxide, copper, copper oxide, magnesium oxide, boron carbide, silicon carbide, titanium carbide, zirconium carbide, tantalum carbide, molybdenum carbide, boron nitride, chromium nitride, titanium nitride, zirconium nitride, aluminum nitride, chromium boride, Cr3Br4, titanium boride, zirconium boride, tungsten disilicide, and titanium disilicide;
• and
• the modified layer is generated by a reaction of a dianhydride and a diamin.