Photocurrent in and miscibility of poly(N-vinylcarbazole)/poly(methyl methacrylate) blends

Steady-state photocurrent in poly(N-vinylcarbazole)(PVCz) (26,48 wt%)/poly(methyl methacrylate)(PMMA) blends is for the first time measured. The PVCz(26,48 wt%)/PMMA blends showed almost the same carrier-generation efficiencies at electric fields higher than 1 x 10(5) V.cm(-1). The results are explained by high miscibility of the PVCz(26,48 wt%)/ PMMA blends, suggesting the existence of PVCz chains in continous PMMA-rich phase in the phase-separated structure. The miscibility is also evaluated by means of excimer fluorescence of PVCz in these blends and fluorescence microscopy.