Triphenylamine Dendrimer Synthesis And Luminescence Properties Of EL/OLED Devices Produced

The paper dibenzothiophene - triphenylamine (ST-G1), naphthalene - triphenylamine Dendritic molecules (NP-G1) as the emission layer with the structure of ITO / TCTA / ST-G1 & NP-G1/BCP / Mg: Ag in the three light-emitting devices, test EL device performance. The device in the open 6V, 12V voltage, brightness and efficiency of close to 1000 cd m-2 and 0.2 lm/W.System test the synthesized materials spectroscopy, single photon fluorescence spectral properties, through the use of Lippert equation, the dipole moment changes, cyclic voltammetry theory discussed in detail a number of branches of molecular structure, molecular plane of , molecular "core" of their single-photon absorption and fluorescence behaviors. The results obtained are as follows:(1) Tound that elements of "nuclear" different result in the different intramolecular charge transfer, thereby affecting the nature of the molecular fluorescence, the greater the degree of conjugation, the stronger the fluorescent molecules. The size of fluorescence intensity: dibenzothiophene core> naphthalene nucleus.(2) Electroluminescence device emitting layer of thick, low HOMO LUMO and high luminous intensity and improve the current efficiency, current density-voltage curves reflect the electrical properties of the device.(3) Electroluminescent devices ITO surface treatment have increased their use of ozone surface work function; organic material vapor pressure is relatively high, relatively poor thermal conductivity, easy to decompose at high temperatures; Light-Emitting Devices on very sensitive to oxygen and water, both of which reduce the luminescence efficiency, affecting the working life of the device.