The choice of the organic light emitting material in Character LCD Module

The characteristics of the organic material deeply affect the performance of the photoelectric characteristics of the component. The choice of the anode material, the material itself must ITO transparent conductive film is a high work function (High work function) 4.5eV-5.3eV and can be translucent, so having a high work function, stable and light-transmissive nature will has been widely used in the anode. In the cathode portion, in order to increase the efficiency of the light emitting element, the electron and hole injection usually requires a low work function metal such as Ag, Al, Ca, In, Li and Mg (Low work function) on a composite metal or a low work function Country of the cathode (e.g.: Mg-Ag magnesium silver).custom lcd module
Suitable for the transmission of electronic organic materials may not be suitable for passing holes, organic light-emitting diode electron transport layer and hole transport layer must choose different organic materials. Currently the most used to produce the electron-transporting layer material must Built membrane stability, thermal stability and good electron transport ships commonly used fluorescent dye compound. The Alq, Znq, Gaq, Bebq, Balq, DPVBi, ZnSPB, PBD, OXD, BBOT etc.. The hole transport layer material is an aromatic amine fluorescent compounds, such as the TPD, TDATA and other organic materials.
The material of the organic light emitting layer is required to have a strong fluorescence in the solid state, the carrier transport properties, good thermal stability and chemical stability, high quantum efficiency and the vacuum vapor deposition characteristics, general organic light emitting layer material usually used with The electron transport layer or the hole transport layer using the same material.
In general, the OLED according to the light emitting material is divided into two types: small molecular OLED and a polymer OLED (also referred to as PLED). Small molecule OLED and polymer OLED differences mainly in the preparation process of the device: small molecular devices using vacuum thermal evaporation process, the polymer devices using spin coating or spray printing process.SPI oled