Improvement of photoelectrochemical and opticalcharacteristics of MEH-PPV using titaniumdioxide nanoparticles

Auteurs :  Farid Habelhames, Leila LAMIRI, Wided Zerguine, Belkacem Nessark
Année : 2013
Domaine : Chimie
Type : Article de journal
Revue : Materials Science in Semiconductor Processing
Résumé en PDF :  (résumé en pdf)
Fulltext en PDF :  (.pdf)
Mots clés : Organic–inorganic compounds MEH-PPV Morphology Photoelectrochemical properties

Résumé : 

The use of bulk heterojunctions can increase the efficiency of exciton dissociation inpolymer-based photovoltaics. We prepared and characterized bulk heterojunctions ofpoly[2-methoxy-5-(20-ethylhexyloxy)-p-phenylenevinylene] (MEH-PPV) and titaniumdioxide nanoparticles deposited by spin coating on indium tin oxide substrates. Thesurface morphology of the MEH-PPVþTiO2 composite films revealed that addition ofTiO2 nanoparticles increased the film roughness. The effect of TiO2 nanoparticles on thephotoelectrochemical and optical characteristics of MEH-PPV polymer heterojunctionswas studied. Addition of TiO2 nanoparticles improved the absorbance of MEH-PPVcomposite films. Moreover, the photocurrent of the composite devices increased withthe TiO2 nanoparticle concentration. These observations provide an insight into newapproaches to improve the light collection efficiency in photoconductive polymers