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UNIVERSITY OF BUCHAREST
FACULTY OF PHYSICS Guest
2024-11-23 18:34 |
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Conference: Bucharest University Faculty of Physics 2016 Meeting
Section: Solid State Physics and Materials Science
Title:
Study of Performances of Hybrid Polymeric/biologic Photovoltaic Cells
Authors:
Melania Loredana ONEA(1), Sorina IFTIMIE(1), Adrian RADU(1), Lucian ION(1), Stefan ANTOHE(1,2)
Affiliation:
1)University of Bucharest, Faculty of Physics, Romania
2)Academy of Romanian Scientists, Bucharest, Romania
E-mail
onea.melania@gmail.com
Keywords:
Keywords: chlorophyll-a, P3HT, PCBM, PV cells
Abstract:
We report the fabrication of hybrid photovoltaic cells based on biologic and polymeric thin films deposited onto optical glass substrates, by spin-coating. Chlorophyll-a was used as constitutive of the active layer and as buffer layer together with poly (3,4-ethylenedioxythiophene)-poly (styrenesulfonate), PEDOT:PSS. Their photovoltaic performances were compared with those obtained for classical structures – glass/ITO/PEDOT:PSS/Chl-a:P3HT:PCBM(10:1:1)/LiF/Al and glass/ITO/Chl-a/PEDOT:PSS/P3HT:PCBM(1:1)/LiF/Al.. Optical investigations were performed for active layers, Chl-a:P3HT:PCBM(10:1:1) and P3HT:PCBM(1:1) in the visible range, at room temperature. Morphological features were analyzed by atomic force microscopy (AFM) and scanning electron microscopy (SEM) and showed a good miscibility between the constitutive materials. Electrical and photoelectrical measurements were made in dark and AM 1.5 conditions, at room temperature, too. The action spectra showed an enlargement of the spectral response of samples containing chlorophyll-a as part of the active layer. Parameters characterizing a photovoltaic cell, short circuit current, Isc, open circuit voltage, Voc, and fill factor, FF, were calculated and discussed.
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