Abstract
A series of electroluminescent and conductive phenyl ring-substituted poly(N-phenyl-N-styryl-1-naphthylamine) (P-XNPA, where X=-H (P01), -OCH3 (P02) and -F (P03)) polymers were prepared. The polymers exhibit a high hole mobility, an excellent solubility and a good thermal stability. Their emission color, ionization potential (IP), quantum efficiency, glass transition temperature (Tg), efficiency and stability were all found to be related to the properties of the phenyl substituted side group. As an example, the hole mobility of poly(4-MeONPA) (P02) is 10-5 cm2V-1s-1 at room temperature, compared tothat of poly(N-vinylcarbazole) (PVK) being 10-7 cm2V-1s-1. P02 emits blue light at 450 nm and has a high thermal stability at an onset decomposition temperature above 420°C and Tg of 132°C. A simple organic light-emitting diode (OLED) device fabricated from the same polymer has a maximum luminance of 588 cd/m2 at 175 mA/cm2.