Abstract: An organic electroluminescent structure has a first electrode, a first primary color luminescent patterned layer disposed on the first electrode, a second primary color luminescent patterned layer disposed on the first electrode, a third primary color luminescent and electron transport layer disposed on the first electrode, the first primary color luminescent patterned layer and the second primary color luminescent patterned layer, and a second electrode disposed on the third primary color luminescent and electron transport layer.

Abstract: A light-emitting material is represented by the following general formula [1]: useful as an emissive layer of organic electroluminescent device (OELD). The chemical structure L is selected from a group consisting of the chemical structures AA, BB, AB, and the combination thereof. The chemical structures A and B are respectively represented by the following general formulas [2] and [3]: The chemical structure X is selected from the group 4A to 6A elements of the periodic table. The chemical structure B is an aromatic hydrocarbon having n benzenes, wherein n is an integer of 1 to 8.

Abstract: An organic electroluminescent structure has a first electrode, a first primary color luminescent patterned layer disposed on the first electrode, a second primary color luminescent patterned layer disposed on the first electrode, a third primary color luminescent and electron transport layer disposed on the first electrode, the first primary color luminescent patterned layer and the second primary color luminescent patterned layer, and a second electrode disposed on the third primary color luminescent and electron transport layer.

Abstract: An organic electroluminescent device (OELD) is provided. The OELD includes a substrate, an anode, a cathode and an emissive layer. The anode and the cathode opposite to the anode are disposed over the substrate. The emissive layer is disposed between the anode and the cathode. The emissive layer includes a light-emitting material. The chemical structure of the light-emitting material represented by the formula [1]: The chemically structure L is selected from a group consisting of the chemical structures AA, BB, AB, and the combination thereof. The chemical structure A of the formula [2]: The chemical structure X is selected from the group 4A to 6A elements of the periodic table. The chemical structure B is aromatic hydrocarbons having n benzene, n is a integer of 1 to 8.

Abstract: An organometallic complex having formula (I) wherein M is a transition metal; A1 and A2 are each independently a monodentate ligand, or are covalently joined to form a bidentate ligand; wherein when X is oxygen, R1, R2, R3, R4 are each independently CN, CF3, C1-20 alkoxyl, or NRR?; and when X is S or NR, R1, R2, R3, R4 are each independently halogen, CN, CF3, C1-20 alkyl, C5-7 aryl, C1-20 alkoxyl, or NRR?; wherein R, R? are each independently C1-20 alkyl or C5-7 aryl; m is the valence of M; and n is 1, 2, or 3.