Patent ID: 8569793

Claim:
An organic light-emitting diode, which comprises: a substrate with a first electrode formed thereon; a first light-emitting region disposed over the first electrode, wherein the first light-emitting region comprises at least one layer of a first light-emitting layer, the at least one first light-emitting layer comprises at least one first dye, and the first dye is a fluorescent dye, a phosphorescence dye, or a mixture thereof; a spacer disposed on the first light-emitting region; a second light-emitting region disposed on the spacer, wherein the second light-emitting region comprises at least one layer of a second light-emitting layer, the at least one second light-emitting layer comprises at least one second dye, and the second dye comprises Ir(piq) 2 (acac), Ir(2-phq) 3 , and Ir(ppy) 3 , and the second light-emitting layer further comprises a host material, in which a content of the Ir(piq) 2 (acac) is 0.01 to 10 wt % of the host material, a content of the Ir(2-phq) 3 is 0.01 to 10 wt % of the host material, and a content of the Ir(ppy) 3 is 0.01 to 10 wt % of the host material; and a second electrode disposed over the second light-emitting region, wherein the spacer is made of a material with a HOMO and LUMO energy levels between those of the first light-emitting region and the second light-emitting region respectively.