Light-Emitting Element, Light-Emitting Device, Electronic Device, Lighting Device, and Organometallic Complex
申请人:Semiconductor Energy Laboratory Co., Ltd.
公开号:US20180062084A1
公开(公告)日:2018-03-01
In a light-emitting element, a layer including an organic compound includes a light-emitting layer; the light-emitting layer includes a tris iridium complex; and on the assumption that there is a rectangle which covers the iridium complex and in which at least one atom of the iridium complex is located over each of four sides when the iridium complex is two-dimensionally seen from a direction of a C3 symmetry axis of the iridium complex, A×B/C
2
is greater than or equal to 2.5, where A represents a maximum length of a long side of the rectangle, B represents a length of a short side of the rectangle when the length of the long side of the rectangle is A, and C represents a width in the direction of the C3 symmetry axis when the iridium complex is two-dimensionally seen from a normal direction of the C3 symmetry axis.
在发光元件中,包括有机化合物的层包括一个发光层;发光层包括一个三核铱配合物;假设存在一个矩形,覆盖铱配合物,在该矩形中,当从铱配合物的C3对称轴方向二维观察时,铱配合物的至少一个原子位于四条边的每一边上,当矩形的长边最大长度为A时,A×B/C2大于或等于2.5,其中A代表矩形的长边的最大长度,B代表矩形的短边长度,当矩形的长边长度为A时,C代表铱配合物从C3对称轴的正常方向二维观察时在C3对称轴方向的宽度。