| 摘要 |
PROBLEM TO BE SOLVED: To provide a light-emitting element having high color purity, and high luminance efficiency, while reducing power consumption.SOLUTION: In a light-emitting element having 150 having a first electrode 101, a second electrode 102, and an EL layer 100, the first electrode has a function for reflecting light, and the second electrode has a function for reflecting light, and a function for transmitting light. The EL layer is provided between first electrode and second electrode, and has a guest material 132. The guest material has a function capable of converting the triplet excitation energy into light emission, has a maximum value of emission spectrum in dichloromethane solution, in a wavelength region of 440-470 nm, and a full width at half maximum of 20-80 nm.SELECTED DRAWING: Figure 1 |
