The Synthesis And Characterization Of Photoelectricity Polymer In Solar Cells

Due to its good electron-donation ability,polyphenylvinylene(PPV) takes an important role in the study of organic photovoltaic materials.In this research, polyphenylvinylene(PPV) derivatives,including symmetric poly(2,5-dibutoxy)-phenylvinylene and non-symmetric poly(2-(2-ethylhexyloxy)-5-alkoxybenzene)-phenylvinylene,were prepared through etherification,chloromethylation and condensation reactions using hydroquinone as starting material.In the preparation of ether,the kinetic model of the etherification reaction was established.With this model,the reaction rate constant,activation energy parameters were calculated.Based on the kinetic model and its parameters,the etherification's reaction conditions were optimized for preparation of non-symmetrical ether,which gives better yields of non-symmetrical ethers.Followed in chloromethylation,reaction conditions were optimized and high quality bis-chloromethylation products were obtained.Using single chloromethylation products as molecule-weight-control adjustor,PPV derivatives with different narrow distributed molecular weight were synthesized.The relationship between polymers and their UV-Vis absorption properties were studied and the energy band gap of polymers were calculated,which would facilitate to the study of optical polymers in the future.Meanwhile,using HPLC,GC-MS technical,approaches have been set up in the determination of the products and by-side products in the reactions.