A light-emitting device material with a low refractive index is provided. The light-emitting device material contains an organic compound which has a pyridine skeleton, a diazine skeleton, or a triazine skeleton and in which the proportion of carbon atoms forming a bond by sp
3
hybrid orbitals is within a certain range. The light-emitting device material contains an organic compound including at least one six-membered heteroaromatic ring having 1 to 3 nitrogen atoms and a plurality of aromatic hydrocarbon rings each having 6 to 14 carbon atoms in a ring. At least two of the plurality of aromatic hydrocarbon rings are benzene rings. The organic compound has a plurality of hydrocarbon groups forming a bond by the sp
3
hybrid orbitals. The ordinary refractive index of a layer containing the organic compound with respect to light with a wavelength in the range from 455 nm to 465 nm is 1.5 to 1.75.
提供了一种低折射率的发光设备材料。该发光设备材料含有一种有机化合物,该有机化合物具有
吡啶骨架、
嘧啶骨架或三嗪骨架,并且其中通过sp3杂化轨道形成键的
碳原子比例在一定的范围内。发光设备材料含有至少一个六元杂环芳族环,该六元杂环芳族环具有1至3个
氮原子和多个六至十四个
碳原子的
芳香烃环。至少两个上述多个
芳香烃环是
苯环。该有机化合物具有多个通过sp3杂化轨道形成键的
碳氢化合物基团。含有该有机化合物的层相对于波长在455纳米至465纳米范围内的光的普通折射率为1.5至1.75。