Electro-optical Properties and Temporal Stability of the Guest-Host DCNP/PEK-c Polymer Thin Film

The polyetherketone(PEK-c)guest-host system thin films in which the range of the weight percent of 3-(1,1-dicyanothenyl)-1-phenyl-4,5-dihydro-1H-pry azole(DCNP)is from 20% to 50% were prepared.The predicted high value of electro-optical(EO) coefficient γ33=48.8 pm/V by using two-level model was obtained when the weight percent of DCNP in the polymer system is 40%,whereas EO coefficients are attenuated at higher chromophore loading than 40%.The temporal stability of the EO activity of the guest-host polymer was evaluated by probing the decay of the orientational order of the chromophores in the polymer system.