Abstract: The present invention provides an organic electroluminescence (EL) element that suppresses leakage current flowing between an upper electrode and an under electrode through an organic layer. The organic EL element (51) is provided at a pixel region (R11) surrounded by a bank (3) on the substrate, and comprises: an organic layer (9) including at least one layer of the light-emitting layer (6); an upper electrode (7) and an under electrode (2) which hold the organic layer (9) therebetween; and a leakage current block layer (5) formed between the upper electrode (7) and the under electrode (2) at the boundary region (R12) between the pixel region (R11) and the bank region (R13), and formed between the upper electrode (7) and the under electrode (2) at the boundary region (R12) between the pixel region (R11) and the bank region (R13).

Abstract: An organic electroluminescent device comprising a supporting substrate, a sealing substrate and an organic electroluminescent element, comprising: the organic electroluminescent element mounted on the supporting substrate, and enclosed between the supporting substrate and the sealing substrate, and an insulating layer that covers the organic electroluminescent element, wherein the supporting substrate and/or the sealing substrate adhered to the insulating layer is formed of a material having thermal conductivity of 2 W/m·K or more, and wherein one surface of the supporting substrate and/or the sealing substrate formed of the material having the thermal conductivity, which is the surface constituting an exterior of the organic electroluminescent device, has surface roughness (Ra value) of 10 nm or more and 1 mm or less.

Abstract: A coating solution for an application method in which a coating solution is discharged through a slit discharge port includes an organic compound that is a solid at 20° C., a first solvent having a boiling point of lower than 170° C. and a second solvent having a boiling point of 170° C. or higher.

Abstract: The present invention provides an organic electroluminescence (EL) element that suppresses leakage current flowing between an upper electrode and an under electrode through an organic layer. The organic EL element (51) is provided at a pixel region (R11) surrounded by a bank (3) on the substrate, and comprises: an organic layer (9) including at least one layer of the light-emitting layer (6); an upper electrode (7) and an under electrode (2) which hold the organic layer (9) therebetween; and a leakage current block layer (5) formed between the upper electrode (7) and the under electrode (2) at the boundary region (R12) between the pixel region (R11) and the bank region (R13), and formed between the upper electrode (7) and the under electrode (2) at the boundary region (R12) between the pixel region (R11) and the bank region (R13).