A pyrromethene metal complex is used as a fluorescent dye to form a light emitting device. The light emitting device has a substance which brings about light emission between an anode and a cathode. By applying electrical energy, the device generates emission having an emission peak wavelength of 580 to 720 nm. The device contains at least one of: a diketopyrrolo[3,4-c]pyrrole derivative and an organic fluorescent material having a fluorescent peak wavelength of 580 to 720 nm; and a light emitting device composition containing a pyrromethene metal complex.
                            一种
吡咯甲烷金属配合物被用作荧光
染料,形成发光装置。发光装置具有一种物质,在阳极和阴极之间引起发光。通过施加电能,该装置产生具有580到720纳米的发射峰波长的发射。该装置包含以下至少一种:二酮
吡咯[3,4-c]
吡咯衍
生物和具有580到720纳米荧光峰波长的有机荧光材料;以及含有
吡咯甲烷金属配合物的发光装置组成。