21-02-2013 дата публикации
Номер: US20130043460A1
Принадлежит:
Disclosed is a carbazole serial compound, having a general formula as: 9. An organic light emitting diode , comprising:an anode;a cathode; andan organic layer disposed between the anode and the cathode,{'claim-ref': {'@idref': 'CLM-00001', 'claim 1'}, 'wherein the organic layer comprises the carbazole serial compound as claimed in .'} This application claims priority of Taiwan Patent Application No. 100129323, filed on Aug. 17, 2011, the entirety of which is incorporated by reference herein.1. Field of the InventionThe disclosure relates to a carbazole serial compound, and in particular relates to an organic light emitting diode utilizing the same.2. Description of the Related ArtThe earliest report of organic electroluminescence was made by Pope et al in 1963, who observed a blue fluorescence from 10-20 μm of crystalline anthracene by applying voltage across opposite sides of a crystal. Thus, the report started a wave of improvements in organic electroluminescence research. However, difficulties of growing large areas of crystals were a challenge. The driving voltage of the devices at the time were too high and the efficiency of organic materials was lower than that of inorganic materials. Because of the disadvantages, the devices were not widely applied due to practical purposes.However, a major development in organic electroluminescence technology was reported in 1987. Tang and VanSlyke of Eastman Kodak Company used vacuum vapor deposition and novel hetero junction techniques to prepare a multilayered device with hole/electron transporting layers. 4,4-(cyclohexane-1,1-diyl)bis(N,N-dip-tolylbenzenamine) (TPAC) was used as the hole transporting layer, and Alq(tris(8-hydroxyquinolinato) aluminum(III)) film with good film-forming properties was used as an electron transporting and emitting layer. A 60-70 nm-thick film was deposited by vacuum vapor deposition with a low-work function Mg:Ag alloy as a cathode for efficient electron and hole injections. The bi-organic- ...
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