| 摘要 |
The present invention relates to a light-emitting device, and especially relates to an organic light-emitting device having light-emitting characteristics with three wavelengths, which is mainly to dispose a hole transport layer, an electron blocking layer, a first host material layer, a second host material layer, a hole blocking layer and an electron transport layer between the anode and cathode, wherein the first host material layer is mixed with the first guest light-emitting material which can emit the first color light (B) under the action of an external bias, and the second host material is relatively mixed with the second guest light-emitting material which emits the second color light (G) and the third guest light-emitting material which emits the third color light (R). Since the second guest light-emitting material and the third guest light-emitting material are phosphorous materials, a continuous full-band color light having the characteristics of three-wavelengths can be obtained directly by using the combination of three primaries (red, green, blue). Additionally, the phosphorous material can be effectively utilized to increase the light-emitting efficiency greatly.
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