Molecular Crystals and Liquid Crystals, Vol.538, 98-102, 2011
Performance of Organic Light-Emitting Diodes Using an Emissive Material with High Hole Drift Mobility
This study focuses on the performance of organic light-emitting diodes (OLEDs) using an emissive material with high hole drift mobility, tris[4-(5-phenylthiophen-2-yl)]amine (TPTPA), which exhibits the highest level of hole drift mobility (1.0 x 10(-2) cm(2) V(-1) s(-1)) among those reported for organic disordered systems. Clear blue emission was observed from TPTPA which was used as the hole transporting and emissive layer in the OLEDs. The maximum luminance of 1.2 x 10(4) cd/m(2), and the maximum current efficiency of 3.9 cd/A were achieved. The short response times of electroluminescence (ca. 10 ns) were achieved under the application of rectangular-shaped voltages.
Keywords:High hole drift mobility;organic light-emitting diode;transient characteristic;tris[4-(5-phenylthiophen-2-yl)]amine