Organic electroluminescent device comprising a patterned photosensitive composition and a method for producing same

A method for producing an organic electroluminescent device, which comprises;

• i) forming a first electrode layer on a substrate,
• ii) forming a first deposition-preventing layer partly on said first electrode layer and forming at least a portion of boundaries of an active area of said electroluminescent device, by photo-curing thereon a photosensitive resin composition comprising a polymerizable compound and a photoinitiator having an initiation wavelength λ, wherein said photosensitive resin composition has a reduced transmission of light of wavelength λ;
• and
• iii) forming an organic luminescent layer and a second electrode layer in that order overlying said first electrode layer within said active area.

A method for producing an organic electroluminescent device, which comprises;

• i) forming a first electrode layer on a substrate,
• ii) forming a first deposition-preventing layer partly on said first electrode layer and forming at least a portion of boundaries of an active area of said electroluminescent device;
• and
• iii) forming an organic luminescent layer and a second electrode layer in that order overlying said first electrode layer within said active area,
• wherein said first deposition-preventing layer has a resistivity falling between 1×1012 and 1×104 Ω·cm.