Electroluminescence device with multiple laminated bodies having common materials and process for producing the same

A process for producing an electroluminescence device comprising at least three kinds of laminated bodies having a common hole transfer layer and a common electron transfer layer, each of the at least three kinds of laminated bodies having an emission region that is independently present in each of the common hole transfer layer and the common electron transfer layer, and said electroluminescence device emitting at least three colors of light,

• said process comprising:
• forming a first electrode, which is common in at least three kinds of said laminated bodies, on a common substrate,
• forming said common hole transfer layer by film formation of a common hole transfer layer forming material on a region containing at least three kinds of said laminated bodies on said first electrode,
• forming said common electron transfer layer by film formation of a common electron transfer layer forming material on a region containing at least three kinds of said laminated bodies on a region containing said common hole transfer layer,
• forming second electrodes for at least three kinds of said laminated bodies on said common electron transfer layer, to face said first electrode,
• in a blue-light emitting laminated body, forming a hole block layer for causing recombination of an electron and a hole in a hole transfer organic material of the common hole transfer layer of the blue-light emitting laminated body, wherein blue-light emission is obtained by said recombination, and
• in a red-light emitting laminated body, forming a red-light emitting layer for causing recombination of an electron and a hole in the red-light emission layer, wherein red-light emission is obtained by said recombination.

An electroluminescence device comprising:

• two kinds of laminated bodies having a common hole transfer layer and a common electron transfer layer, each of the two kinds of laminated bodies having an emission region that is independently present in each of the common hole transfer layer and the common electron transfer layer, said emission region comprising an organic compound,
• said two kinds of laminated bodies each comprising an organic substance containing said emission region, and
• said two kinds of laminated bodies comprising:
• a blue-light emitting laminated body comprising a hole block layer for causing recombination of an electron and a hole in a hole transfer organic material of the common hole transfer layer of said blue-light emitting laminated body, wherein blue-light emission is obtained by said recombination, said blue-light emitting laminated body not comprising a red emission layer;
• and
• a green-light emitting laminated body wherein green emission is obtained by recombination of an electron and a hole in an electron transfer organic material of the common electron transfer layer of said green-light emitting laminated body, said green-light emitting laminated body not comprising a hole block layer or a red emission layer, and
• wherein said electroluminescence device emits two colors of light.

A process for producing an electroluminescence device comprising two kinds of laminated bodies having a common hole transfer layer and a common electron transfer layer, each of the two kinds of laminated bodies having an emission region that is independently present in each of the common hole transfer layer and the common electron transfer layer, and said electroluminescence device emitting two colors of light,

• said process comprising:
• forming a first electrode, which is common in two kinds of said laminated bodies, a blue-light emitting laminated body and a green-light emitting laminated body, on a common substrate,
• forming said common hole transfer layer by film formation of a common hole transfer layer forming material on a region containing two kinds of said laminated bodies on said first electrode,
• forming said common electron transfer layer by film formation of a common electron transfer layer forming material on a region containing two kinds of said laminated bodies on a region containing said common hole transfer layer, and
• forming second electrodes for two kinds of said laminated bodies on said common electron transfer layer, to face said first electrode,
• in said blue-light emitting laminated body, forming a hole block layer for causing recombination of an electron and a hole in a hole transfer organic material of the common hole transfer layer of the blue-light emitting laminated body, wherein blue-light emission is obtained by said recombination, said green-light emitting laminated body not comprising a hole block layer.