Charge trapping in [poly-(2-methoxyl),5-(3,77dimethyloctyloxy)] paraphenylenevinylene synthesized in different routes affected by the energetical distribution of trapping states

摘要

In this study, the thermally stimulated current measurements are used as a direct photoelectrical method to prove distribution of the trapping states in MDMO-PPV ([poly-(2-methoxyl),5-(3,77dimethyloctyloxy)] paraphenylenevinylene) polymers synthesized in the "Gilch" and "Sulfinyl" routes. It was demonstrated that two traps with the Gaussian distribution of the states and effective mean activation energies of about 0.22 and 0.40 eV are prevailing in MDMO-PPV synthetized in the "gilch" route, meanwhile in the material synthesized in the "sulfinyl" route the best expressed traps appear at 0.28 eV.