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Film forming properties of electrosprayed organic heterojunctions

  • M. Ali (a1) (a2), M. Abbas (a3) (a4), S.K. Shah (a1), E. Bontempi (a5), A. Di Cicco (a1) and R. Gunnella (a1) (a6)...

Abstract

We used the electrospray deposition (ESD) method to fabricate organic photovoltaic devices with poly (3-hexyl-thiophene) (P3HT) and [6,6]-phenyl C61 butyric acid methyl ester (PCBM) blends of different composition ratios and different organic solvent solution, namely chloroform (CLF) and dichlorobenzene (DCB). The morphology and crystallinity of the active layers were investigated by means of atomic force microscopy (AFM), two-dimensional X-ray diffraction (XRD2) and optical absorption, spreading light on the peculiarities of the present growth technique, involving much faster solvent evaporation and film forming processes, and comparatively much more ordered strutures with less need of thermal annealing processes. The power conversion efficiency (PCE) under AM 1.5G solar simulation obtained for devices deposited from DCB as compared to those deposited from CLF, showed significant improvement, in fair agreement with what was found by the overall characterization of the physical properties.

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Film forming properties of electrosprayed organic heterojunctions

  • M. Ali (a1) (a2), M. Abbas (a3) (a4), S.K. Shah (a1), E. Bontempi (a5), A. Di Cicco (a1) and R. Gunnella (a1) (a6)...

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