Studies on preparation of poly(PV-co-DMeOPV) and its characteristic of PL and EL

In this contribution, how to prepare the electroluminescence materials of Poly(PV-co-DMeOPV) based on Wessling solutable precusor route was described. The determined spectrum shapes of the PL and EL of co-polymer having 1 : 1 mole ratio all are single-peak type, and different from the double-peak shapes of PL and EL spectra of PPV. And the emissive maximum magnitudes of PL and EL of above co-polymer are 520 nm and 570 nm, respectively. The PL peak lies on about middle position between 515 nm and 601 nm which are the PL short-wave peaks of PPV and PDMeOPV, respectively. For the sake of discussing the influence of co-polymerization on luminescence property of co-polymer, the EHMACC/CO(Crystal Orbital) program is used to calculate the energy bands of PPV, PDMeOPV and 1 : 1 molar ratio co-polymer. The results show that due to the p-π conjugation between the - OCH ₃ and the main chain, the energy gap of co-polymer decreases, and the emission spectrum is red-shift; this kind of effect will become stronger and stronger with the increasing of - OCH ₃ number on the conjugative chain.