A kind of polymer electroluminescence (EL) material poly(p-phenylene vinylene) (PPV) was synthesized and the EL devices were fabricated by spin-coatin. It was shown that this material had strong PL and good EL performance

and the spectra shapes changed with the thickness of the PPV thin films

also the EL spectra changed with the drive voltages

this is attributed to the reabsorption of the PPV film itself.Moreover

the PPV film was found can act as the hole transport layer (HTL) of the multi-layer TEFL devices. The EL devices using PPV as HTL and 8-hydroxyquino-line aluminum (Alq3) as emitting material were made

high brihtness more than 3700nt was measured

much better than that of those devices without PPV HTLs.