Luminescent Properties of Organic Electroluminescent Devices Using Alq_3 and TPD Materials with CuPc, Buffer Layer

摘要

The optical properties of electroluminescent device (EL) fabricated using Alq_3, (8-hydroxy-quinoline)aluminum) and TPD (N, N'-bis (-3-methylphenyl)-(1,1'-biphenyl)-4,4'-diamine) with CoPc (copper phthalocyanine) buffer layer were investigated. The triple-layered EL device consists of five layers, ITO/CuPcITPD/Alq_3/AI and the cell was fabricated by the vacuum evaporation method. We obtained a turn-on voltage at 5 V and the maximum emission peak at 525 nm from the measurement of EL spectrum, and EL intensities tend to increase with increasing applied voltage.