Light emitting device composition and light emitting device containing the same

A method for producing a composition for light emitting device containing a host material and a guest material blended therein, comprising

• a host material preparation step of preparing a host material containing an aromatic compound having a condensed ring skeleton in which only three or more benzene rings are condensed,
• a determination step of determining the blending ratio of the guest material to said host material,
• a guest material preparation step of preparing a guest material which contains an aromatic amine compound and with which, when mixed with said host material at said blending ratio, the total amount of sodium atoms contained in said host material and sodium atoms contained in said guest material with respect to the total amount of said host material and said guest material is 400 ppb by mass or less, and
• a production step of mixing said host material and said guest material at said blending ratio to obtain a composition for light emitting device.

A method for producing a composition for light emitting device containing a host material and a guest material blended therein, comprising

• a guest material preparation step of preparing a guest material containing an aromatic amine compound,
• a determination step of determining the blending ratio of the host material to said guest material,
• a host material preparation step of preparing a host material which contains an aromatic compound having a condensed ring skeleton in which only three or more benzene rings are condensed and with which, when mixed with said guest material at said blending ratio, the total amount of sodium atoms contained in said host material and sodium atoms contained in said guest material with respect to the total amount of said host material and said guest material is 400 ppb by mass or less, and
• a production step of mixing said guest material and said host material at said blending ratio to obtain a composition for light emitting device.

A method for producing a composition for light emitting device containing a host material and a guest material blended therein, comprising

• a host material preparation step of preparing an aromatic compound having a condensed ring skeleton in which only three or more benzene rings are condensed as the host material,
• a guest material preparation step of preparing an aromatic amine compound as the guest material,
• a determination step of determining the blending ratio of said host material and said guest material,
• a purification step of purifying at least a part of said aromatic compound and said aromatic amine compound such that, when said host material and said guest material are mixed at said blending ratio, the total amount of sodium atoms contained in said host material and sodium atoms contained in said guest material with respect to the total amount of said host material and said guest material is 400 ppb by mass or less, and
• a production step of mixing said host material containing said aromatic compound and said guest material containing said aromatic amine compound at said blending ratio to obtain a composition for light emitting device.