Substrate with an electrode for an oled device and such an oled device
AssigneeSaint-Gobain Glass France
InventorFabien Lienhart
Life of this patent
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Abstract
A substrate carrying an OLED electrode, with a sheet resistance of less than 25 Ω/square, includes an electrically conducting coating, an essentially inorganic thin electrically conducting layer which is a work-function-matching layer and which exhibits a sheet resistance at least 20 times greater than the sheet resistance of the electrically conducting coating, with a thickness of at most 60 nm, and, between the electrically conducting coating and the work-function-matching layer, a thin buffer layer, which is essentially inorganic and which has a surface resistivity within a range from 10−6 to 1 Ω·cm2.
Claims22
A substrate carrying an electrode intended to form the anode or the cathode of an organic light-emitting diode (OLED) device, said electrode being based on an electrically conducting stack with a sheet resistance of less than 25 Ω/square comprising:
- an electrically conducting coating of one or more thin layers forming at least 90% of the electrical conduction of the stack,
- an essentially inorganic thin electrically conducting layer which is a work-function-matching layer, to be placed in contact with an organic layer for injection of the charges of the OLED, wherein the work-function-matching layer exhibits a sheet resistance at least 20 times greater than the sheet resistance of the electrically conducting coating with a thickness of at most 60 nm, and
- between the electrically conducting coating and the work-function-matching layer, a thin buffer layer, which is essentially inorganic and which has a surface resistivity within a range from 10−6 to 1 Ω·cm2.
Dependencies are inferred from the claim text.