Synthesis and characterization of a novel green photoluminescent silicon-containing poly(p-phenylenevinylene)

A novel solution processable photoluminescent polymer containing silyl grou ps has been successfully synthesized through a polycondensation reaction. T he polymer was characterized through FT-IR, NMR, UV-vis spectroscopy, photo luminescent spectroscopy (PL), elemental analysis and cyclic voltammetry (C V). A TGA analysis shows that the polymer is stable up to 300 degrees C bot h in air and in nitrogen. The UV-vis absorption spectra for both the soluti on and film samples are very similar. The band gap obtained from the optica l spectra is 2.53 eV. The maximum emissions of photoluminescence are at 494 and 507 nm for the solution and film samples, respectively. The UV-vis spe ctrum of its polymer film also shows a very small temperature dependence. A cyclic voltammogram illustrates that the polymer can be reversibly n-doped and dedoped in a negative sweep and irreversibly p-doped during a positive sweep. All of the results demonstrate that the obtained polymer is a promi sing green-light emission material for PLED applications.