Abstract: A method of producing a film having excellent external quantum efficiency when used in a light emitting layer of a light emitting device is provided. A method of film production includes preparing an ink containing a specific metal complex, storing the ink for 3 days or more under light shielding, and forming a film by using the stored ink. The total content of metal complexes having a molecular weight larger by 16, 32 or 48 than that of the specific metal complex according to an area percentage value determined by liquid chromatography is 0.6 or less when the content of the specific metal complex is taken as 100.

Abstract: A method of producing a film having excellent external quantum efficiency when used in a light emitting layer of a light emitting device is provided. A method of film production includes preparing an ink containing a specific metal complex, storing the ink for 3 days or more under light shielding, and forming a film by using the stored ink. The total content of metal complexes having a molecular weight larger by 16, 32 or 48 than that of the specific metal complex according to an area percentage value determined by liquid chromatography is 0.6 or less when the content of the specific metal complex is taken as 100.

Abstract: A method of producing a film having excellent external quantum efficiency when used in a light emitting layer of a light emitting device is provided. A method of film production includes preparing an ink containing a specific metal complex, storing the ink for 3 days or more under light shielding, and forming a film by using the stored ink. The total content of metal complexes having a molecular weight larger by 16, 32 or 48 than that of the specific metal complex according to an area percentage value determined by liquid chromatography is 0.6 or less when the content of the specific metal complex is taken as 100.

Abstract: A composition which is useful for producing a light emitting device having excellent luminance life is provided. The composition contains a primary fluorinated alcohol represented by the formula (1), a secondary fluorinated alcohol represented by the formula (1?) and an electron injectable compound or an electron transportable compound, wherein the content of the secondary fluorinated alcohol is 0.01% by mass to 0.75% by mass with respect to the total content of the primary fluorinated alcohol and the secondary fluorinated alcohol: CnH2n?m+1FmOH??(1) Cn?H2n??m?+1Fm?OH??(1?) In the formula (1), n represents an integer of 1 to 10, and m is an integer satisfying 1?m?2n+1. In the formula (1?), n? represents an integer of 3 to 10, and m? is an integer satisfying 1?m??2n?+1.

Abstract: A composition is provided which contains a fluorinated alcohol represented by formula (1) and a charge transporting compound: CnFH2nF+1?mFFmFOH??(1) nF and mF are each independently an integer of 1 or more and satisfy 2nF+1?mF. An amount of hydrogen fluoride generated from the fluorinated alcohol under atmospheric pressure at 25° C. is 5.0 ppm by volume or less.

Abstract: A composition which is useful for producing a light emitting device having excellent luminance life is provided. The composition contains a primary fluorinated alcohol represented by the formula (1), a secondary fluorinated alcohol represented by the formula (1?) and an electron injectable compound or an electron transportable compound, wherein the content of the secondary fluorinated alcohol is 0.01% by mass to 0.75% by mass with respect to the total content of the primary fluorinated alcohol and the secondary fluorinated alcohol: CnH2n?m+1FmOH ??(1) Cn?H2n??m?+1Fm?OH ??(1?) In the formula (1), n represents an integer of 1 to 10, and m is an integer satisfying 1?m?2n+1. In the formula (1?), n? represents an integer of 3 to 10, and m? is an integer satisfying 1?m??2n?+1.

Abstract: A composition is provided which contains a fluorinated alcohol represented by formula (1) and a charge transporting compound: CnFH2nF+1?mFFmFOH??(1) nF and mF are each independently an integer of 1 or more and satisfy 2nF+1?mF. An amount of hydrogen fluoride generated from the fluorinated alcohol under atmospheric pressure at 25° C. is 5.0 ppm by volume or less.

Abstract: A method of producing a film having excellent external quantum efficiency when used in a light emitting layer of a light emitting device is provided. A method of film production includes preparing an ink containing a specific metal complex, storing the ink for 3 days or more under light shielding, and forming a film by using the stored ink. The total content of metal complexes having a molecular weight larger by 16, 32 or 48 than that of the specific metal complex according to an area percentage value determined by liquid chromatography is 0.6 or less when the content of the specific metal complex is taken as 100.

Abstract: A fuel injection control apparatus for controlling a fuel injection valve including an arithmetic processing section that determines whether a necessary fuel amount is injectable or not within a fuel injectable range from a first fuel injection start timing, computes a second fuel injection start timing in which the necessary fuel amount is injectable within the fuel injectable range in the case that it is not injectable, and controls the fuel injection valve at the computed second fuel injection start timing so as to start fuel injection.

Abstract: A fuel injection control apparatus for controlling a fuel injection valve including an arithmetic processing section that determines whether a necessary fuel amount is injectable or not within a fuel injectable range from a first fuel injection start timing, computes a second fuel injection start timing in which the necessary fuel amount is injectable within the fuel injectable range in the case that it is not injectable, and controls the fuel injection valve at the computed second fuel injection start timing so as to start fuel injection.