| abstract |
A light-emitting device is provided, which includes an insulating substrate, a first electrode and a second electrode insulated from each other and formed above the insulating substrate, and an electrolyte disposed on the first electrode and the second electrode. The electrolyte contains an ionic liquid and luminescent pigment having a reversible redox structure. Each of the first electrode and the second electrode have an elongated configuration, in an unit length of each of the first electrode and the second electrode, a surface area is 3 to 1000 times as large as a ground contact area, the surface area being an area of a surface of each of the first electrode and the ground contact area being an area projected upon the insulating substrate as the insulating substrate provided with the first electrode and the second electrode is looked from a top surface of the insulating substrate. |