Substrate for an organic light-emitting device, use and process for manufacturing this substrate, and organic light-emitting device

Abstract

The invention relates to a substrate for an organic light-emitting device especially a transparent glass substrate, which includes, on a first main face a bottom electrode film the electrode film being formed from a thin-film multilayer coating comprising, in succession, at least a contact layer based on a metal oxide and/or a metal nitride; a metallic functional layer having an intrinsic electrical conductivity property; an overlayer based on the metal oxide and/or a metal nitride, especially for matching the work function of said electrode film, said substrate including a base layer, the base layer covering the main face.

1 . A substrate for an organic light-emitting device comprising, on a first main face, a bottom electrode film, the electrode film being formed from a thin-film multilayer coating comprising, in succession:
 a base layer, said base layer covering said main face   a contact layer based on a metal oxide and/or a metal nitride;   a metallic functional layer having an intrinsic electrical conductivity property; and   an overlayer based on metal oxide and/or on metal nitride.   
     
     
         2 . The substrate according to  claim 1 , wherein the base layer has a thickness of between 10 and 150 nm. 
     
     
         3 . The substrate according to  claim 1 , wherein the substrate comprises an etch stop layer between the base layer and the contact layer. 
     
     
         4 . The substrate according to  claim 1 , wherein a combination of layers comprising the contact layer, the functional layer, the overlayer, and all the layers located between the contact layer and the overlayer, are etched in the same etch pattern. 
     
     
         5 . The substrate according to  claim 1 , wherein the substrate has, a light transmission TL equal to or greater than 50% and, an absorption of 1-RL-TL equal to or less than 15%, wherein RL is light reflectance. 
     
     
         6 . The substrate according to  claim 1 , wherein the substrate has, on the overlayer, an RMS roughness equal to or less than 3 nm. 
     
     
         7 . The substrate according to  claim 1 , wherein the metallic functional layer is based on at least one of a pure material selected from the group consisting of silver, gold, aluminum and copper, optionally alloyed or doped with another material selected from the group consisting of Ag, Au, Pd, Al, Pt, Cu, Zn, Cd, In, Si, Zr, Mo, Ni, Cr, Mg, Mn, Co and Sn. 
     
     
         8 . The substrate according to  claim 1 , wherein the contact layer is doped. 
     
     
         9 . The substrate according to  claim 1 , wherein the overlayer matches a work function of the electrode film. 
     
     
         10 . The substrate according to  claim 1 , wherein the metallic functional layer is directly on at least one subjacent blocking film, directly beneath at least one superjacent blocking film, or the metallic functional layer is directly on at least one subjacent blocking film and is directly beneath at least one superjacent blocking film. 
     
     
         11 . The substrate according to  claim 1 , comprising a bottom bus electrode structure above the bottom electrode film, said bus electrode structure being in electrical contact with the bottom electrode film. 
     
     
         12 . The substrate according to  claim 1 , comprising an OLED system above the bottom electrode film. 
     
     
         13 . The substrate according to  claim 12 , comprising a top electrode film above said OLED system. 
     
     
         14 . The substrate according to  claim 1 , comprising a bottom bus electrode structure, an OLED layer above the bottom electrode film, a top electrode film above said OLED system and a top bus electrode structure. 
     
     
         15 . An organic light-emitting device comprising the substrate according to  claim 1 . 
     
     
         16 . A glazing unit comprising the organic light-emitting device according to  claim 15 . 
     
     
         17 . The organic light-emitting device according to  claim 15 , comprising a plurality of adjacent organic light-emitting systems, each emitting white light or, by a series of three systems, red light, green light and blue light, the systems being connected in series. 
     
     
         18 . A top-emitting and/or bottom-emitting organic light-emitting device comprising the substrate according to  claim 1 . 
     
     
         19 . The substrate according to  claim 1 , wherein the contact layer and the functional metallic layer are deposited n times on the base layer and an optional etch stop layer, where n is an integer equal to or greater than 1, to form a structure, the structure being surmounted by a sequence comprising: contact layer/functional metallic layer/overlayer.