Organic electroluminescent material, the process for preparing the same and OLED device using the same
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United States of America Patent
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Mar 29, 2016
Grant Date -
Jul 23, 2015
app pub date -
Jan 13, 2015
filing date -
Jan 23, 2014
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Abstract
The present invention provides an organic electroluminescent material, the process for preparing same and an OLED device using same. The organic electroluminescent material has a general formula (I): wherein, each of R1, R2, R3 and R4 is independently selected from the group consisting of H, C1-C20 alkyl, C1-C20 alkoxy, ether groups and aromatic amino groups; each of Z is carbon atom or each of Z is nitrogen atom; R is carbazolyl, wherein, n is an integer ranging from 1 to 3 when each of Z is carbon atom, and n is an integer ranging from 1 to 2 when each of Z is nitrogen atom. The organic electroluminescent material of the invention can be used as emitting layer material in an OLED device and improve the luminescent efficiency and lifetime of the device. The luminescence spectral peakmay be adjusted by changing the group on the molecular structure.
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