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.
本发明提供了一种可用于生产具有出色发光寿命的发光器件的组合物。该组合物含有由式(1)表示的一次
氟化醇、由式(1′)表示的二次
氟化醇以及一种可注入电子的化合物或一种可传输电子的化合物,其中二次
氟化醇的含量占一次
氟化醇和二次
氟化醇总含量的 0.01% 至 0.75%:
CnH2n-m+1FmOH (1)
Cn′H2n′-m′+1Fm′OH (1′)
在式(1)中,n 代表 1 至 10 的整数,m 是满足 1≤m≤2n+1 的整数。在式(1′)中,n′代表3至10的整数,m′是满足1≤m′≤2n′+1的整数。