Functionalized silicon nanowires/conjugated polymer hybrid solar cells: Optical, electrical and morphological characterizations

N. Chehata (1) , A. Ltaief (1) , Emmanuel Beyou (2) , B. Ilahi (1) , B. Salem (3) , T. Baron (3) , P. Gentile (4) , H. Maaref (1) , A. Bouazizi (1)

1 FSM - Faculté des Sciences de Monastir
2 IMP - Ingénierie des Matériaux Polymères
3 LTM - Laboratoire des technologies de la microélectronique
4 SiNaps - Silicon Nanoelectronics Photonics and Structures

We investigate the effects of Si nanowires surface modification with polystyrene (PS) on the performance of bulk heterojunction hybrid solar cells based on poly[2-methoxy-5-(2'-ethylhexyloxy)-1,4-phenylene vinylene] (MEH-PPV) and PS-SiNWs. The optical, electrical and morphological properties of these hybrid nanocomposites have been investigated. Due to charge transfer efficiency, improved electrical coupling between SiNWs and MEH-PPV and homogeneous dispersion of functionalized SiNWs, the performance of studied photovoltaic structure shows a significant improvement with the progressive addition of PS-SiNWs. With polystyrene surrounded SiNWs as acceptor materials, the device typically shows a J(SC) of 7.36 mu A/cm(2), V-OC of 0.87 V and a FF of 48% for the composition MEH-PPV:PS-SiNWs (1:4).

Mots clés: Organic compounds; Composites; Luminescence; Optical properties; Electrical properties

Domaines: Polymères; Matériaux

N. Chehata, A. Ltaief, Emmanuel Beyou, B. Ilahi, B. Salem, et al.. Functionalized silicon nanowires/conjugated polymer hybrid solar cells: Optical, electrical and morphological characterizations. Journal of Luminescence, 2015, 168, pp.315-324. ⟨10.1016/j.jlumin.2015.08.020⟩. ⟨hal-01265838⟩