My research interests are the elaboration of organic solar cells devices based on organic nanocomposites Organic nanocomposites are composed of an organic conducting polymer mixed with carbon derivative materials such as: C60, Carbon nanotubes (CNTs), PC70BM, Carbon nanopearls (CNPs),
In my PhD thesis, I have studied organic photovoltaic cells based on MEH-PPV:C60 donnor:acceptor nanocomposites The structure of the investigated photovoltaic cells was ITO/MEH-PPV:C60/Al The photoactive layers were composed of the MEH-PPV polymer, acting as electron donnor material and the C60 molecules, acting as electron acceptors This study has emphasized the interplay between nanocomposites morphology and their photovoltaic properties We have studied the influence of C60 concentration on the dissociation of photogenerated pairs and charge transport We have also studied the variation of the photovoltaic parameters according to the organic solvent used to deposit the photoactive layer These effects could be correlated to the different morphologies resulting from the elaboration conditions The best photovoltaic performances have been performed with a new method of mixing donnor/acceptor compounds Organic dyes have been added to the MEH-PPV:C60 active layer in order to increase the absorption of the solar spectrum photons
Recently, I am mainly interested on the study of MEH-PPV : Si NW hybrid nanocomposites Silicon Nanowires (Si-NW) are synthesised by (VLS) technique in a French Laboratory (CEA, Grenoble, France) We demonstrate a photovoltaic response in such structures with a high charge transfer investigated by photoluminescence quenching
Another important research area that I am interested in is the elaboration of conducting, flexible and transparent electrodes based on CNTs films We fabricate PET/CNTs flexible electrodes by vacuum filtration method, which could replace the conventionnel ITO (Indium-Tin-Oxide) transparent electrodes usually used in optoelectronic devices