Measurement of time dependent quantum yield of poly(p-pyridine) and poly(p-phenylenevinylene)

In this paper we report the absolute photoluminescence quantum yield of poly(p-pyridine) (PPy), which is a promising electroluminescent polymer. The influence of vacuum and air on the quantum yield of the PPy is investigated. We find a significant decay of the efficiency under vacuum whereas it is stable in air. We compare the results with those obtained on poly(p-phenylenevinylene)(PPV).