Transfer substrate and method for fabricating organic electroluminescent element

Abstract

A transfer substrate includes a light transmissive support substrate; a light-heat conversion layer formed on the light transmissive support substrate; and a transfer layer formed on the light heat conversion layer. The transfer layer is a layer transferred as a luminescent layer of an organic electroluminescent element and is made of a metal complex, a fluorescent luminescent dopant and an aromatic hydrocarbon whose matrix skeleton has four to seven rings.

1 . A transfer substrate comprising:
 a light transmissive support substrate;   a light-heat conversion layer on said light transmissive support substrate; and   a transfer layer on said light heat conversion layer,   wherein,
 said transfer layer is a layer transferred as a luminescent layer of an organic electroluminescent element and is made of a metal complex, a fluorescent luminescent dopant and an aromatic hydrocarbon whose matrix skeleton has four to seven rings. 
   
     
     
         2 . The transfer substrate according to  claim 1 , wherein said metal complex is a complex in which quinolinol is coordinated to a metal selected from aluminium, gallium and indium. 
     
     
         3 . The transfer substrate according to  claim 1 , wherein said aromatic hydrocarbon is used in an amount within a range of not larger than 50 wt % in said transfer layer. 
     
     
         4 . The transfer substrate according to  claim 1 , wherein said transfer layer has a laminated structure including a mixed layer of said metal complex and said fluorescent luminescent dopant and a layer of said aromatic hydrocarbon. 
     
     
         5 . The transfer substrate according to  claim 1 , wherein said transfer layer has a laminated structure including a layer made of said metal complex, a layer of said fluorescent luminescent dopant, and a layer made of said aromatic hydrocarbon. 
     
     
         6 . The transfer substrate according to  claim 1 , wherein said fluorescent luminescent dopant is made of a green luminescent material or a red luminescent material. 
     
     
         7 . A method for fabricating an organic electroluminescent element comprising the steps of:
 forming a pattern of a lower electrode on a device substrate;   forming an organic layer including at least a luminescent layer on said lower electrode; and   forming an upper electrode laminated on said lower electrode through said organic layer,   wherein,
 said luminescent layer is formed by (a) providing a transfer substrate obtained by forming, on a light transmissive support substrate, a light heat conversion layer and a transfer layer constituted of three types of organic materials including a host material and a fluorescent luminescent dopant in this order, (b) placing said transfer substrate in face-to-face relation with said device substrate in such way that said transfer layer is opposed to a side of said device substrate, and (c) sublimating said transfer layer by beam irradiation from a side of said support substrate to transfer said transfer layer to above of said device substrate.