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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-22 1:45 |
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Conference: Bucharest University Faculty of Physics 2010 Meeting
Section: Biophysics and Medical Physics;Electricity and Magnetism
Title:
Study of Physical Properties of ITO/PEDOT/P3HT:PCBM(1:1)/LiF/Al Photovoltaic Cells
Authors:
SORINA IFTIMIE 1, A. MAJKIC 2, CRISTINA BESLEAGA 1, ADRIAN RADU 1, IULIA ARGHIR 1, CAMELIA FLORICA 1, M. RADU 1, G. BRATINA 2, S. ANTOHE 1
Affiliation:
1 Faculty of Physics, University of Bucharest, 405 Atomistilor street, PO BOX MG-11, 077125, Magurele-Ilfov, Romania
2 University of Nova Gorica, Vipavska 13, POB 301 SI-5000 Nova Gorica, Slovenia
E-mail
santohe@solid.fizica.unibuc.ro
Keywords:
P3HT, PCBM, bulk-heterojunction, organic photovoltaic cells
Abstract:
Photovoltaic structures based on P3HT:PCBM(1:1) polymers blend were prepared by spin coating technique, using optical glass substrates covered with 30 nm thick ITO, commercially available. Two sets of samples were prepared with the same blend, but differing by the LiF layer thickness. The current-voltage (I-V) characteristics, in dark and at illumination through ITO electrode of the ITO/PEDOT/P3HT:PCBM(1:1)/LiF/Al structures were measured. The action spectra of the cells revealed the features also observed in absorption spectra of the component polymers. Their non-linearity and asymmetry were explained on the base of electrode/organic semiconductor interface behavior. A fill factor (FF) of 0.24 was calculated and the power conversion efficiency was 0.41% for the as prepared samples. The cell parameters in regime of photo-element were determined and their dependence on the thickness of the LiF layer are presented and discussed.
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