OLED organic light-emitting material selection Character LCD Modules

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 4.5eV-5.3eV and can be translucent, so having a high work function, the properties of stability and light transmittance of the ITO transparent conductive film having a high work function (Highworkfunction), it is widely applied to the anode. Ag, Al, Ca, In, Li and Mg 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 (Lowworkfunction) metal compound or a low work function metal cathode (e.g.: Mg-Ag magnesium silver).
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.lcd graphic display
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 same material used in the electron transport layer or a hole transport layer, for example, Alq is widely used in green, Balq, and DPVBi are widely used in Blu-ray.

In general, the OLED according to the light emitting material is divided into two types: small molecule 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.OLED Display